How many grams are in 87g of potassium bromide?

Answers

Answer 1

The number of mole present in 87 grams of potassium bromide, KBr is 0.731 mole

How do i determine the number of mole present?

We'll begin our calculation by obtaining the molar mass of potassium bromide, KBr. Details below:

Molar mass of ptassium, K = 39 g/molMolar mass of bromine, Br = 80 g/molMolar mass of potassium bromide, KBr =?

Molar mass of potassium bromide, KBr = K + Br

Molar mass of potassium bromide, KBr = 39 + 80

Molar mass of potassium bromide, KBr = 119 g/ mol

Finally, we shall determine the number of mole present. Details below:

Mass of potassium bromide, KBr = 87 grams Molar mass of potassium bromide, KBr = 119 g/mol Mole of potassium bromide, KBr =?

Mole = mass / molar mass

Mole of potassium bromide, KBr = 87/ 119

Mole of potassium bromide, KBr = 0.731 mole

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Complete question:

How many moles are in 87g of potassium bromide?


Related Questions

how many moles of oh- are in 55.85 ml of 0.350 m naoh? do not include units and place answers in 3 sig figs. be sure to include any zeros before the decimal and do not put answer in scientific notation.

Answers

The number of moles of OH- in 55.85 mL of 0.350 M NaOH is 0.01976 moles.

This can be calculated using the following equation:
the number of moles of OH- in 55.85 mL of 0.350 M NaOH is 0.01976 moles with 3 significant figures.
To determine the number of moles of OH⁻ present in 55.85 mL of 0.350 M NaOH, we use the formula;

Molarity = Moles of solute ÷ Volume of solution in L

It can be simplified to:

Molarity = Moles of solute ÷ (Volume of solution in mL ÷ 1000)Moles of solute = Molarity × (Volume of solution in mL ÷ 1000)

Thus, the number of moles of OH⁻ present in 55.85 mL of 0.350 M NaOH is given by;

Moles of OH⁻ = 0.350 M × (55.85 mL ÷ 1000) = 0.0196 moles

Therefore, there are 0.0196 moles of OH⁻ present in 55.85 mL of 0.350 M NaOH.

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how many signals are expected to appear between 3350-3500 cm -1 in the ir spectrum of a primary amine?

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Answer: In summary, a primary amine should show between one and three signals in the IR spectrum between 3350 cm-1 and 3500 cm-1.

The exact number of signals depends on the structure and chemical environment of the molecule.


The infrared (IR) spectrum of a primary amine should show signals between 3350 cm-1 and 3500 cm-1, with the exact number depending on the structure and chemical environment of the molecule. Generally, primary amines should exhibit signals at 3300 cm-1, 3350 cm-1, 3420 cm-1 and 3500 cm-1. These signals correspond to the stretching vibrations of the N-H bond, C-N bond, C-H bond and the N-H out of plane bend, respectively.

To determine the number of signals expected between 3350 cm-1 and 3500 cm-1, one needs to consider the structure and environment of the molecule in question. In an unmodified primary amine, a total of two signals should be seen, namely the C-H bond at 3350 cm-1 and the N-H out of plane bend at 3500 cm-1.

However, if the primary amine has a ring structure or is part of a larger, more complex molecule, additional signals may appear, including the C-N bond at 3420 cm-1.

In summary, a primary amine should show between one and three signals in the IR spectrum between 3350 cm-1 and 3500 cm-1. The exact number of signals depends on the structure and chemical environment of the molecule.

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what is the concentration of the naoh solution which requires 37.96 ml of naoh to titrate 0.702 g of khp?

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The concentration of NaOH solution that requires 37.96 mL of NaOH to titrate 0.702 g of KHP is 0.0896 M.

To calculate the concentration of the NaOH solution which requires 37.96 mL of NaOH to titrate 0.702 g of KHP, we first need to know the balanced equation of the reaction between NaOH and KHP.

The balanced equation is as follows:

NaOH(aq) + KHC₈H₄O₄(aq) = KNaC₈H₄O₄(aq) + H₂O(l)

According to the equation, one mole of NaOH reacts with one mole of KHP (potassium hydrogen phthalate) to produce one mole of NaKC₈H₄O₄ (sodium hydrogen phthalate) and one mole of H2O (water).

Thus, the mole of NaOH required to titrate KHP is:

Mole of NaOH = (mass of KHP) / (molar mass of KHP)

Molar mass of KHP = 204.22 g/mol (mass of KHP is given as 0.702 g)

Mole of NaOH = 0.702 g / 204.22 g/mol = 0.0034 mol NaOH

The volume of NaOH is also given as 37.96 mL. But we need to convert it to liter.

Liters of NaOH = 37.96 mL / 1000 mL/L = 0.03796 L

Concentration (M) of NaOH can be calculated by dividing the number of moles of NaOH by the volume of NaOH in

.

Concentration (M) of NaOH = 0.0034 mol NaOH / 0.03796 L

NaOH = 0.0896 M

Therefore, the concentration of NaOH solution that requires 37.96 mL of NaOH to titrate 0.702 g of KHP is 0.0896 M.

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Match the following terms to their units. A. Atomic mass B. Molarity C. Molar mass - mol/liter amu g/mol ne relationship between the atomic mass of an element and a mole point)​

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The matching is like :- (A) Atomic mass - amu (atomic mass units) (B) Molarity - mol/liter (C) Molar mass - g/mol (grams per mole)

The atomic mass (in amu) is used to convert between the mass of an element and the number of moles of that element, while the molar mass (in g/mol) is used to convert between the mass of a compound and the number of moles of that compound. Molarity (in mol/L) is used to express the concentration of a solution. In chemistry, the atomic mass of an element is the mass of a single atom of that element relative to the mass of a carbon-12 atom, which is defined as exactly 12 atomic mass units (amu). The atomic mass is typically given in units of amu, and it is used to convert between the mass of an element and the number of moles of that element. Molarity is a unit of concentration that is commonly used in chemistry. It is defined as the number of moles of solute per liter of solution. The unit for molarity is mol/L, which is often abbreviated as M. Molar mass is the mass of one mole of a substance. It is expressed in units of grams per mole (g/mol). The molar mass is used to convert between the mass of a compound and the number of moles of that compound. For example, if we know the atomic mass of an element (in amu), we can use it to calculate the molar mass of that element (in g/mol). Similarly, if we know the molarity of a solution (in mol/L) and the molar mass of the solute (in g/mol), we can calculate the mass of the solute in a given volume of the solution.

In summary, the atomic mass, molarity, and molar mass are all important concepts in chemistry that are expressed in different units. Understanding these units and how to use them is essential for many calculations in chemistry.

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a solution at room tempearature with a ph of less than 7 will be: select the correct answer below: acidic basic neutral depends on the solution
a. Acidic
b. Basic
c. Neutral
d. Depens on the solution

Answers

The correct answer is the option a) acidic. A solution at room temperature with a pH of less than 7 will be acidic.

What are acids and bases?

Acids and bases are two types of chemical compounds that are important to human life. Acids are substances that have a pH of less than 7. They taste sour and, when mixed with a base, form a neutral substance. Acids are often used in industrial processes, such as cleaning or etching metals, as well as in medicine.

Bases are substances that have a pH of greater than 7. They taste bitter and have a slippery feel. When mixed with an acid, they form a neutral substance. Bases are commonly used in cleaning products and in the production of fertilizers and plastics.

A solution at room temperature with a pH of less than 7 will be acidic.

Therefore, the correct answer is (a) Acidic.

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g fully reacting an aldehyde with an alcohol will produce? a. an acetal b. a primary alcohol c. no reaction d. a carboxylic acid

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Fully reacting an aldehyde with an alcohol will produce an acetal.

What is an acetal?

Acetal is a functional group consisting of two ether groups bonded to the same carbon atom. It's also called a 1,1-dialkoxyalkane.

Acetals are generated by the reaction of carbonyl compounds with alcohols under acidic or basic conditions.

Acetals can be used as protecting groups for carbonyls in organic synthesis. The carbonyl group is made less reactive by formation of the acetal, which shields it from further reaction.

Therefore, reaction with nucleophiles such as organolithium reagents or Grignard reagents is prevented.

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Which one of the following compounds is not a product of reaction between 1,3-butadiene and HBr? Select one a. (S)-3-bromo-1-butene b. (R)-3-bromo-1-butene c. (E)-1-bromo-2-butene d. (Z)-1-bromo-2-butene e. (Z)-2-bromo-2-butene

Answers

The correct option is E. The compound that is not a product of the reaction between 1,3-butadiene and HBr is (Z)-2-bromo-2-butene.

A chemical reaction is a process in which one or more substances (reactants) are transformed into new substances (products) by breaking and forming chemical bonds. Chemical reactions are essential in many natural and synthetic processes, including the formation of the molecules that make up living organisms and the production of materials such as medicines, fuels, and plastics.

Chemical reactions involve the rearrangement of atoms, ions, or molecules, resulting in the formation of new substances with different properties from those of the reactants. The reactants and products of a chemical reaction can be represented by a chemical equation, which shows the identities and quantities of the reactants and products.

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what is the percent yield if 578 g of h3po4 are produced when 10.0 moles of water react with an excess of p4o10?

Answers

The percent yield of H₃PO₄ when 10.0 moles of water react with an excess of P₄O₁₀ is 88.4%.

The balanced chemical equation is:

P₄O₁₀ + 6H₂O → 4H₃PO₄

We can find the theoretical yield of H₃PO₄ by using stoichiometry, which is the relationship between the number of moles of the reactants and products in a chemical reaction.

6.0 mol of H₂O reacts with P₄O₁₀ to give 4 moles of H₃PO₄ according to the balanced chemical equation.

Therefore, the number of moles of H₃PO₄ formed will be:

10.0 mol of H₂O x (4 mol of H₃PO₄ / 6 mol of H2O) = 6.67 mol of H₃PO₄

Now we can find the theoretical yield of H₃PO₄ using its molar mass, which is 98.0 g/mol.

Theoretical yield = 6.67 mol of H₃PO₄ x 98.0 g/mol = 653.6 g of H₃PO₄

The actual yield of H₃PO₄ formed in the reaction is given as 578 g.

Percent yield = actual yield / theoretical yield x 100%

Percent yield = 578 g / 653.6 g x 100% = 88.4%

Therefore, the percent yield will be lower than the expected value of 100%. It will be 88.4%.

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est Your Knowledge Question 2 Question 2 of 3 2 Identify the variables that must remain constant to maintain an equilibrium constant and equilibrium position. : Color Variables that Must Remain Constant Variables that Do Not Need to Remain Constant : Concentration : Pressure # Size # Temperature Check Answer

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The variables that must remain constant to maintain an equilibrium constant and equilibrium position are concentration, temperature, and pressure.

What is equilibrium constant?

Equilibrium constant (Kc) is defined as the ratio of the products of the concentrations of the products of a chemical reaction to the products of the concentrations of the reactants, each raised to their stoichiometric coefficients.

The term ‘equilibrium’ refers to a condition where the concentrations of the reactants and products in a reversible reaction are constant over time.

Identify the variables that must remain constant to maintain an equilibrium constant and equilibrium position

The variables that must remain constant to maintain an equilibrium constant and equilibrium position are given below:

Concentration Temperature Pressure

The variables that do not need to remain constant are color and size.

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I NEED HELP ON THIS ASAP!

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The correct numbers and symbol of elements represented by X are: (1). calcium (2). 18 (3) 15

The Atomic symbolThe element's symbol, atomic number, and mass number must all be known in order to create the notation of an atom. Atomic number is written as a subscript, and the mass number of the atom appears above the symbol.We can calculate the mass of an atom by adding the numbers of protons and neutrons. The letter "A" is used to signify it. An atom's atomic number is determined by how many protons are found in its nucleus or how many electrons are present in an electrically neutral atom. The letter "Z" is used to signify it.

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The amount of open space between particles when compared to the total possible volume of the particles is called its _______.

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The amount of open space between particles when compared to the total possible volume of the particles is called its porosity. Porosity is a term used to describe the amount of open space or voids in a substance.

The open space or void can be filled with air or water, and it determines how much fluid the substance can hold.

Porosity is calculated as the ratio of the volume of open space to the total volume of the substance, usually expressed as a percentage or decimal fraction.

A high porosity means that the substance has a lot of open space or void, while a low porosity means that there is less open space or void between particles.

Porosity is an important measurement used in various fields, including petroleum, geology, and engineering, to determine how efficient a substance is in holding fluid.

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if a sample has 50 atoms of 87 rb and 50 atoms of sr, how many half-lives has the sample gone through?

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Answer: If a sample has 50 atoms of 87Rb and 50 atoms of Sr, it has gone through the equivalent of 77.7 billion years in half-lives.


In order to answer this question, we need to know the half-lives of both 87Rb and Sr. The half-life of 87Rb is 48.8 billion years and the half-life of Sr is 28.9 billion years.

Therefore, the sample has gone through the equivalent of (50/50) x 48.8 billion years, or 48.8 billion years, of 87Rb's half-life.

It has also gone through (50/50) x 28.9 billion years, or 28.9 billion years, of Sr's half-life. In total, the sample has gone through the equivalent of 77.7 billion years in half-lives.


In summary, if a sample has 50 atoms of 87Rb and 50 atoms of Sr, it has gone through the equivalent of 77.7 billion years in half-lives.


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the precise amount of air required for the complete combustion of a hydrocarbon can be calculated by considering the stoichiometric conversion of the hydrocarbon to co2 and h2o. determine the stoichiometric air-fuel ratios for combustion of cyclohexane, cyclohexene, and benzene.

Answers

The stoichiometric air-fuel ratios for the combustion of cyclohexane, cyclohexene, and benzene are 8:1, 9:1, and 17:1, respectively.

The stoichiometric air-fuel ratio for combustion of hydrocarbons, such as cyclohexane, cyclohexene, and benzene, is the amount of air necessary for complete combustion of the hydrocarbon.

This can be determined by considering the stoichiometric conversion of the hydrocarbon to carbon dioxide (CO2) and water (H2O).

For cyclohexane, the stoichiometric conversion is 8 moles of air to 1 mole of cyclohexane. This means the stoichiometric air-fuel ratio is 8:1.

Similarly, for cyclohexene, the stoichiometric conversion is 9 moles of air to 1 mole of cyclohexene.

Therefore, the stoichiometric air-fuel ratio for cyclohexene is 9:1. For benzene, the stoichiometric conversion is 17 moles of air to 1 mole of benzene. This yields a stoichiometric air-fuel ratio of 17:1.

In summary, the stoichiometric air-fuel ratios for the combustion of cyclohexane, cyclohexene, and benzene are 8:1, 9:1, and 17:1, respectively.

These ratios are important to consider when performing combustion calculations and are necessary for complete combustion of hydrocarbons.

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if 20.0 ml of a 0.0800 m hno3, 35.0 ml of a 0.0500 m kscn, and 80.0 ml of a 0.0700 m fe(no3)3 are combined, what is the initial concentration of fe3 in the mixture? do not use scientific notation in your answer.

Answers

Answer: The initial concentration of Fe3 in the mixture is 8.95 mL.

The initial concentration of Fe3 in the mixture can be calculated using the equation: c1V1 + c2V2 + c3V3 = c, where c is the total molarity, V1, V2, and V3 are the volumes of the respective solutions, and c1, c2, and c3 are the initial molarities.

In this case, we have 20.0 ml of a 0.0800 M HNO3, 35.0 ml of a 0.0500 M KSCN, and 80.0 ml of a 0.0700 M Fe(NO3)3.

We can then calculate the initial concentration of Fe3 in the mixture as follows:

c = (0.0800 M * 20.0 mL) + (0.0500 M * 35.0 mL) + (0.0700 M * 80.0 mL)

c = (1.6 mL) + (1.75 mL) + (5.6 mL)

c = 8.95 mL

Therefore, the initial concentration of Fe3 in the mixture is 8.95 mL.


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all atoms can be easily detected by atomic emission, this is advantageous compared with atomic absorption. group of answer choices true false

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The statement, "all atoms can be easily detected by atomic emission, this is advantageous compared with atomic absorption," is false.

Atomic absorption and atomic emission spectroscopy are two commonly employed techniques for the determination of elements present in a sample.

The advantage of atomic emission spectroscopy over atomic absorption spectroscopy, and vice versa, is dependent on the particular sample to be analyzed.

The principle of atomic absorption spectroscopy is that an atom in the gaseous state absorbs ultraviolet or visible radiation to move from the ground state to an excited state.

As a result, the intensity of the transmitted radiation decreases in proportion to the concentration of the absorbing species.

When a sample is analyzed, the sample is vaporized and the amount of absorption is measured at a specific wavelength.

The amount of radiation that is absorbed by the sample is directly proportional to the amount of the analyte present in the sample.

This information can then be used to estimate the analyte's concentration in the original sample.In atomic emission spectroscopy, the sample is excited by a high-energy source, causing the atoms to reach a higher energy state.

The atoms will eventually return to their ground state by releasing the excess energy, which is emitted as light.

The frequency and intensity of the light emitted is used to determine the concentration of the analyte present in the sample. This process is known as atomic emission spectroscopy.

Atomic absorption spectroscopy is superior in cases where the analyte concentration is low or the sample is a complex mixture,

whereas atomic emission spectroscopy is superior when high sensitivity is required or when the sample contains multiple elements.

Thus, it can be concluded that not all atoms can be easily detected by atomic emission, and that both methods have advantages and disadvantages.

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The smallest unit of life that can sustain itself is called an organism or an biosphere or a population

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The smallest unit of life that can sustain itself is called an organism.

An organism is a living entity that is composed of one or more cells, which are the basic structural and functional units of life. These cells are capable of carrying out all the necessary processes for the organism's survival, including metabolism, growth, reproduction, and response to stimuli. An organism can exist as a single-celled or multi-celled entity, and can range in size from microorganisms like bacteria to large mammals like elephants. The biosphere is the term used to describe the global ecological system that encompasses all living organisms and their interactions with each other and their physical environment. A population is a group of individuals of the same species living in a specific geographic area.

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A mixture of oxygen carbon dioxide and nitrogen has a total pressure of 0. 97-atm what is the partial pressure of 02 if the pco2 is 0. 70-atm and the pn2 is 0. 12-atm

Answers

The partial pressure of O2 is 0.15 atm if the pco2 is 0. 70-atm and the pn2 is 0

we have a mixture of three gases: oxygen (O2), carbon dioxide (CO2), and nitrogen (N2).

We are given the total pressure of the mixture, which is 0.97 atm, as well as the partial pressures of CO2 and N2, which are 0.70 atm and 0.12 atm, respectively.

To find the partial pressure of O2, we need to subtract the partial pressures of CO2 and N2 from the total pressure.

Partial pressure of O2 = Total pressure - Partial pressure of CO2 - Partial pressure of N2

Partial pressure of O2 = 0.97 atm - 0.70 atm - 0.12 atm

Partial pressure of O2 = 0.15 atm

Therefore, the partial pressure of O2 is 0.15 atm.

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is crystal violet a basic substance or an acidic substance? is congo red a basic or an acidic substance? describe how you were able to arrive at this conclusion and relate your findings to your experimental observations.

Answers

Crystal violet and Congo red are both acidic substances. This can be determined through the use of pH testing.

When a pH test is performed on a solution, a color change will occur depending on the acidity or basicity of the solution. Crystal violet and Congo red are both acids and not basic because when exposed to a base, such as sodium hydroxide, they will turn a pinkish color.

Similarly, when an acid is added to the solution, they will turn a bluish color. In an experiment, these color changes can be observed, thus helping to determine the nature of the substance.

To further prove the acidic nature of crystal violet and congo red, a titration can be conducted. A titration is a laboratory technique in which a solution of known concentration is used to determine the concentration of an unknown solution. In this experiment, a titrated solution is prepared by mixing a known quantity of crystal violet or congo red with a known quantity of a base, such as sodium hydroxide.

The solution will then be titrated against a known concentration of acid. The end point of the titration can be determined when the solution turns a pinkish color. The results of this experiment will indicate that crystal violet and congo red are both acidic substances.

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what is the name of the material that resists oxidation at elevated temperatures so air can be used as a plasma gas?

Answers

The material that resists oxidation at elevated temperatures so air can be used as a plasma gas is stain steel.

Stаinless steels аre most commonly used for their corrosion resistаnce. The second most common reаson stаinless steels аre used is for their high temperаture properties; stаinless steels cаn be found in аpplicаtions where high temperаture oxidаtion resistаnce is necessаry, аnd in other аpplicаtions where high temperаture strength is required.

The high chromium content which is so beneficiаl to the wet corrosion resistаnce of stаinless steels is аlso highly beneficiаl to their high temperаture strength аnd resistаnce to scаling аt elevаted temperаtures.

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how many moles of iron metal are produced when 3.2 mol iron (iii) oxide and 2.3 mol carbon monoxide react? fe2o3 3co -------> 2fe 3co2 step by step

Answers

Answer : When 3.2 moles of iron (III) oxide and 2.3 moles of carbon monoxide react, 2 moles of iron metal are produced.

2 moles of iron metal are produced when 3.2 moles of iron (III) oxide (Fe2O3) and 2.3 moles of carbon monoxide (CO) react. The balanced chemical equation for this reaction is: Fe2O3 + 3CO --> 2Fe + 3CO2.

This reaction is a combustion reaction, meaning it involves the oxidation of iron (III) oxide by the carbon monoxide. Oxygen from the iron oxide is released as carbon dioxide (CO2) and the iron is left in the reduced form, or elemental iron (Fe).

To calculate the moles of iron metal produced, the mole ratio of Fe2O3 to Fe must be determined. From the balanced equation, it can be seen that for every 1 mole of Fe2O3, 2 moles of Fe are produced. Therefore, to calculate the number of moles of Fe, multiply the number of moles of Fe2O3 by 2. In this case, that would be 3.2 moles of Fe2O3 x 2 = 6.4 moles of Fe.

Finally, to get the number of moles of Fe metal produced, subtract the number of moles of Fe2O3 from the number of moles of Fe. In this case, 6.4 moles of Fe - 3.2 moles of Fe2O3 = 2 moles of Fe metal.



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Calculate the approximate volume of a 0.600 mol sample of gas at 15.0ºC and a pressure of 0.63 atm.

Answers

Answer:

The approximate volume of the gas is 14.8 L.

Explanation:

To calculate the approximate volume of the gas, we can use the Ideal Gas Law, which relates the pressure, volume, temperature, and number of moles of a gas:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant (0.08206 L·atm/(mol·K)), and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15:

T = 15.0ºC + 273.15 = 288.15 K

Then, we can rearrange the Ideal Gas Law to solve for the volume:

V = (nRT) / P

Plugging in the given values:

V = (0.600 mol)(0.08206 L·atm/(mol·K))(288.15 K) / 0.63 atm

V ≈ 14.8 L

Therefore, the approximate volume of the gas is 14.8 L.

Answer:

the approximate volume of the gas sample at 15.0ºC and 0.63 atm pressure is 14.9 L.

Step by step explanation:

To calculate the volume of a gas sample, we can use the Ideal Gas Law:

PV = nRT

where P is the pressure in atmospheres, V is the volume in liters, n is the number of moles, R is the gas constant (0.08206 L·atm/K·mol), and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin by adding 273.15:

T = 15.0ºC + 273.15 = 288.15 K

Next, we can plug in the values and solve for V:

V = (nRT) / P

V = (0.600 mol)(0.08206 L·atm/K·mol)(288.15 K) / (0.63 atm)

V ≈ 14.9 L

Therefore, the approximate volume of the gas sample at 15.0ºC and 0.63 atm pressure is 14.9 L.

The chemical weathering process known as oxidation would be most effective in the breakdown of which of the following Earth minerals?
pyroxenes
quartz
calcite
halite
feldspar

Answers


The chemical weathering process known as oxidation would be most effective in the breakdown of pyroxenes, quartz, calcite, and feldspar Earth minerals.

Oxidation is a chemical reaction between oxygen and other substances in the environment which causes a breakdown of the Earth minerals, resulting in their decomposition. Halite, or sodium chloride, is an example of a mineral that is not affected by the oxidation process.

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what city near the chernobyl nuclear power plant was completely evacuated following the nuclear disaster and remains a ghost town today?

Answers

The city of Pripyat, Ukraine, located approximately 2.5 miles away from the Chernobyl Nuclear Power Plant, was completely evacuated following the nuclear disaster of April 26th, 1986.

This city, which was home to nearly 50,000 residents at the time, remains a ghost town today. The Chernobyl Nuclear Power Plant was in the process of conducting a safety test at the time of the disaster, which involved shutting down the reactor and ensuring its safety systems were working. Unfortunately, a flaw in the reactor caused a chain reaction and led to a large amount of radiation being released into the environment.

The fallout from the disaster was massive, and the nearby city of Pripyat was severely affected. In response, the Ukrainian government ordered the entire city to be evacuated immediately. Over the course of three days, 50,000 residents were relocated to safer areas, leaving the city a ghost town. Today, Pripyat is still considered uninhabitable and is a popular tourist attraction. Tourists can explore the deserted city and observe the effects of the disaster firsthand.

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(ANSWER THE FULL THING PLS OR I WILL REPORT, if you do answer it all, I will mark brainliest)

In a model experiment baking soda (sodium bicarbonate) is combined with white vinegar (5% acetic acid) under the following circumstances:
Sodium bicarbonate + acetic acid → carbon dioxide + water + sodium acetate


NaHCO3 (s) + CH3COOH (l) → CO2 (g) + H2O (l) + NaCH3COO (aq)


1. What are the “reactants” in this reaction?



2. What “forms” are the reactants each in?



3. What are the “products” in this reaction?



4. What “forms” are each product in this reaction found in?



5. Is this equation balanced? Why or why not?



6. If I told you this reaction is “endothermic” and you touched the bottom of the catch tray after the reaction runs would it feel hot or cold? Why?



7. If I increase the amounts of both reactants would you expect the reaction to speed up or slow down? Why?



8. If I increase the amount of one reactant only, what would you expect to happen? Why?



9. How do I know that carbon dioxide is being produced? What is my “direct observation”?



10. If I went to the store and purchased apple cider vinegar which has a known concentration of 10% acetic acid and used it in place of white vinegar, what variable am I altering and what result would you expect?


11. If I tried this experiment with baking soda that had been open and in my refrigerator for two months and was still “cold” when I started the experiment, what results might we expect? Why?


12. If I was setting up my experiment and I carefully allow both the baking soda and vinegar to reach room temperature before I started my experiment - what part of an experimental design would I be affecting? Select one.

a. Independent variable

b. Dependent variable

c. Constant

d. Control

13. If I warmed my vinegar to a temperature of 85℉ from room temperature of 72℉, what result would you expect and why? Select one.

a. The reaction would proceed faster as you could see from more rapid foaming because there are more particle collisions between warmer reactants.

b. The reaction would proceed faster as you could see from more rapid foaming because there are fewer particle collisions between warmer reactants.

c. The reaction would proceed more slowly because there are more particle collisions between warmer reactants.

d. The reaction would not proceed because the activation energy wouldn’t be reached.

14. If I used laboratory grade acetic acid (100% concentration) describe how the following variables would change:

a. Concentration of reactants (independent variable) -


b. Formation of products (dependent variable) -


c. Rate of reaction (slope of the line) -


15. If this sample “unlabelled graph” were used from this experiment - how could we label each portion of the graph? What type of relationship do we see?

Answers

Answer:

The reactants in this reaction are sodium bicarbonate (NaHCO3) and acetic acid (CH3COOH).

Sodium bicarbonate is in solid form (s) while acetic acid is in liquid form (l).

The products in this reaction are carbon dioxide (CO2), water (H2O), and sodium acetate (NaCH3COO).

Carbon dioxide is in gas form (g), water is in liquid form (l), and sodium acetate is in aqueous form (aq).

This equation is balanced because the number of atoms of each element is the same on both sides of the equation.

If the reaction is endothermic and heat is absorbed, the bottom of the catch tray would feel cold because the heat is being absorbed from the surroundings.

If the amounts of both reactants are increased, the reaction would speed up because there are more reactant particles available to collide and react.

If the amount of one reactant is increased, the reaction rate would increase only up to a certain point, after which the rate would remain constant because the other reactant becomes limiting.

Carbon dioxide is being produced because bubbles of gas (CO2) are observed during the reaction.

By using apple cider vinegar with a known concentration of 10% acetic acid, the concentration of the acetic acid in the reaction is altered. This would result in a faster reaction because a higher concentration of reactants leads to more frequent collisions and a higher reaction rate.

If baking soda that has been open and in the refrigerator for two months is used, the reaction may not occur as efficiently as fresh baking soda because it may have absorbed moisture and become less reactive. This could result in a weaker reaction with less carbon dioxide produced.

The correct answer is c. Constant. By allowing both the baking soda and vinegar to reach room temperature before the experiment, you are controlling a constant variable in the experimental design.

The correct answer is a. The reaction would proceed faster as you could see from more rapid foaming because there are more particle collisions between warmer reactants.

a. If laboratory grade acetic acid (100% concentration) is used, the concentration of reactants (independent variable) would increase because the concentration of acetic acid would be higher.

b. The formation of products (dependent variable) would also increase because there would be more reactants available to react, leading to a higher yield of products.

c. The rate of reaction (slope of the line) would increase because a higher concentration of reactants leads to a higher reaction rate.

List at least 5 industries and 5 daily activities that contribute to the build-up of harmful gasses in the atmosphere and one way of combating each of these emission build-ups and then describe the way that your method of combating the build-up of each emission might change the way in which we live.

Answers

Industries that add to the buildup of hazardous gases in the atmosphere include: Transportation (cars, trucks, airplanes, ships) (cars, trucks, airplanes, ships) agricultural production, energy production (coal-fired power plants, oil refineries, and natural gas facilities), and (livestock farming, fertilizer use)

Which three steps can we take to lessen greenhouse emissions and global warming?

By generating energy on-site using renewables and other environmentally friendly energy sources, greenhouse gas emissions can be decreased. Rooftop solar panels, solar water heating, small-scale wind power, natural gas or renewable hydrogen-powered fuel cells, and geothermal energy are a few examples.

How can we in Class 8 lessen the greenhouse effect?

We must cut back on greenhouse gas emissions if we want to lessen the greenhouse effect. via increasing tree planting and reducing deforestation. Pollution and the greenhouse effect can be reduced by reducing the usage of fossil fuels.

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35.0 ml of 0.255 m nitric acid is added to 45.0 ml of 0.328 m mg(no3)2. what is the concentration of nitrate ion in the final solution?

Answers

The concentration of nitrate ion in the final solution when 35.0 ml of 0.255 m nitric acid is added to 45.0 ml of 0.328 m Mg(NO₃)₂ is 0.48 M.

The concentration of HNO₃ and Mg(NO₃)₂ are 0.255M and 0.328M respectively.

The volume of HNO₃ is 35ml.

Volume of Mg(NO₃)₂ is 45ml.

We are supposed to find out the concentration of nitrate ions in the final solution.

Step 1: Calculation of the number of moles of HNO₃ used:

Molarity of HNO₃  = 0.255M

Moles of HNO₃  used = Volume of HNO₃  × Molarity of HNO₃

Moles of HNO₃  used = 35ml × 0.255MMoles of HNO₃  used = 0.00893moles.

Step 2: Calculation of the number of moles of Mg(NO₃)₂ used:

Molarity of Mg(NO₃)₂ = 0.328M

Moles of Mg(NO₃)₂ used = Volume of Mg(NO₃)₂ × Molarity of Mg(NO₃)₂

Moles of Mg(NO₃)₂ used = 45ml × 0.328M

Moles of Mg(NO₃)₂ used = 0.01476moles.

Moles of (NO₃) = 2 x Moles of Mg(NO₃)₂ used = 0.02952

Step 3: Calculation of concentration of nitrate ion in the final solution.

The number of moles of nitrate ion in the solution= 0.02952 + 0.00893 = 0.03845

The concentration of nitrate ion in the solution = (Moles of nitrate ion in the solution)/ (Total Volume of Solution)

The concentration of nitrate ions in the solution = 0.03845mol/(80.0/1000)L= 0.48M in nitrate ions.

Therefore, the concentration of nitrate ions in the final solution is 0.48M.

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a conductor is distinguished from an insulator with the same number of atoms by the number of: electrons protons nearly free atoms nearly free electrons molecules

Answers

A conductor is distinguished from an insulator with the same number of atoms by the number of: electrons protons nearly free atoms nearly free electrons molecules. This statement is true.

What Is A Conductor?

The given statement "a conductor is distinguished from an insulator with the same number of atoms by the number of: electrons protons nearly free atoms nearly free electrons molecules" is true because a conductor is distinguished from an insulator with the same number of atoms by the number of nearly free electrons. A conductor is a substance that easily transmits heat or electricity through it. The reason why conductors do that is that they have free electrons available in their outer shells, so when a voltage is applied to them, the free electrons become excited and start to flow. On the other hand, an insulator is a substance that does not allow electricity or heat to flow through it. Insulators have a high amount of resistance, which means that they do not allow electrical current to pass through them.

The question was incomplete, but most probably your question was:

A conductor is distinguished from an insulator with the same number of atoms by the number of: electrons protons nearly free atoms nearly free electrons molecules (True/False)

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the strongest intermolecular forces are nearly as strong as the forces that hold atoms together in a molecule. true false

Answers

The statement "the strongest intermolecular forces are nearly as strong as the forces that hold atoms together in a molecule" is a false statement. The forces that hold atoms together within a molecule are primarily chemical bonds that are incredibly powerful forces.

Intermolecular forces are the forces of attraction and repulsion between different molecules or particles. In contrast, intramolecular forces refer to the forces that hold atoms together within a molecule.

There are three main types of intermolecular forces:

Van der Waals forcesHydrogen bondsDipole-dipole interactions

These forces are considerably weaker.

The forces that hold atoms together within a molecule are primarily chemical bonds that are incredibly powerful forces. The forces of chemical bonds involve the sharing or transfer of electrons between atoms. Covalent bonds, ionic bonds, and metallic bonds are examples of chemical bonds that hold atoms together in molecules. These bonds are so strong that they are difficult to break.

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A container has a pressure of 5,64 atm and a volume of 26.0 L. The volume of the container was decreased until the pressure was 9:17 atm. What is the new volume?​

Answers

The new volume of the container after the decrease in the former volume would be = 15.99L

How to calculate the final volume of the container?

The initial pressure in the container (P1) = 5.64 atm

The final pressure in the container (P2) = 9.17 atm

The initial volume of the container = 26.0 L

The final volume of the container = ?

to

Using Boyle's law formula;

P1V1 = P2V2

5.64 ×26.0 = 9.17 ×V2

make V2 the subject of formula;

V2 = 5.64×26/9.17

V2 = 146.64/9.17

V2 = 15.99L

Therefore, the new volume of the container is 15.99L which decreased due to increase in pressure.

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if a glass marble weighs 3150 mg, what is the mass in centigrams? group of answer choices 31,050 cg 31.5 cg 3.15 cg none of these 315 cg

Answers

The mass of a glass marble, which is 3150 mg, is 0.315 centigrams. Therefore, the correct option is 3.15 cg.

A type of rock that is created from metamorphic rock composed mainly of carbonate minerals, particularly calcite or dolomite, is known as marble.

Marble is often used as a building material, and it has been used in sculptures for thousands of years. Marble has also been used for flooring, wall coverings, and countertops, among other things.

Marble is resistant to moisture, which makes it ideal for use in bathrooms and kitchens. It's also a great heat-resistant material, which is why it's used in fireplace surrounds and other applications where heat is present.

The marble surface is created by polishing or honing a marble slab. Honing roughs the surface of the stone, while polishing shines it to a high gloss.

Because of its visual appeal, durability, and ease of maintenance, marble is often used in high-end homes and commercial buildings.

It has a smooth texture that feels cool to the touch, making it ideal for hot climates because it keeps surfaces cool.

The substance is well-known for its attractive appearance, and it is frequently used in bathrooms and spas for its aesthetic

A metric unit of mass equal to one-hundredth of a gram (or 10−5 kilogram) is known as a centigram (cg). When determining the weight of objects or ingredients, the centigram is frequently used.

This unit is equal to 0.01 grams in the metric system. The abbreviation "cg" stands for centigrams. To convert a weight from milligrams to centigrams, simply move the decimal point two places to the left.

The formula for converting milligrams to centigrams is as follows: 1 milligram = 0.01 centigrams. As a result, the mass of a glass marble that weighs 3150 mg is equal to 0.315 centigrams.

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