When a hydrogen atom is covalently bonded to either oxygen, , or fluorine there will be an attraction between that hydrogen and a lone pair of on a nitrogen, oxygen, or fluorine atom on an adjacent molecule. This attraction is called a bond.

The mass of the object obtained is 1.32 g and the percent yield is  34.3%.

We know that the reaction equation shows the way the reactants are able to interact so as to obtain the products. We have that;

Number of moles of sodium sulfate = 0.196 M  * 57.9/1000 L

= 0.011 moles

Number of moles of magnesium chloride = 0.398 M * 167/1000 L

= 0.066 moles

Given that the reaction is 1:1, the limiting reactant is sodium sulfate

Then;

Mass of the magnesium sulfate produced = 0.011 moles * 120 g/mol

= 1.32 g

The percent yield of the magnesium sulfate = 0.453 g/ 1.32 g * 100/1

= 34.3%

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Answer:

Find root causes.

Explanation:

i hope the answer be right

Acetaldehyde is a toxic compound created in alcohol metabolism.

what is alcohol metabolism?

Alcohol dehydrogenase, an enzyme found in the liver cells, is responsible for the majority of alcohol metabolism (ADH).

Alcohol metabolism is governed by a number of processes.

The two enzymes involved in the most common of these methods are alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ADH) (ALDH). These enzymes assist in breaking down the alcohol molecule so that the body can eliminate it. ADH first breaks down alcohol into acetaldehyde, an extremely dangerous molecule and known carcinogen. In a following phase, acetaldehyde is further transformed to acetate, a less active byproduct, for rapid removal. Acetate can then be easily converted into carbon dioxide and water.

The researchers reported that heavy drinking leads to elevated acetaldehyde levels, which leads to inhibited ALDH enzymes, and in turn causes these adverse effects. The alcohol does not properly metabolize.

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Answer:

0.1498 g of O2.

Explanation:

The Behavior of Gases => Ideal Gas Law.

The ideal gas law is a single equation that relates the pressure, volume, temperature, and the number of moles of an ideal gas, which is:

where P is pressure in atm, V is the volume in liters, n is the number of moles, R is the ideal gas constant (0.082 L*atm/mol*K), and T is the temperature in the Kelvin scale.

So we have to convert pressure from 700.0 mmHg to atm, volume from 120.0 mL to L, and 15 °C to K.

Let's convert pressure taking into account that 1 atm equals 760 mmHg, like this:

Remember that 1 L equals 1000 mL, so 120.0 mL would be equal:

And the conversion from °C to K is just sum °C with 273, so 15 °C in K is:

Finally, we can use the ideal gas formula, solving for 'n' (number of moles) and replacing the data that we have, as follows:

Now, the final step is to convert 4.680 x 10⁻³ moles of O2 to grams using the molar mass of O2 that can be calculated using the periodic table, which is 32 g/mol. The conversion will look like this:

The answer would be that there are 0.1498 g of O2.

When a mycelium infiltrates an unexploited source of dead organic matter, Fungal digestive enzymes are most likely to appear within the food source soon thereafter.

A network of hyphae with fungal filaments is called mycelium. Although they can thrive in various habitats, such as rotting tree trunks, mycelia frequently grow underground. Mycelium can be produced by a single spore. Many fungi, including mushrooms, grow their fruiting bodies from mycelium. Mycelia are crucial to the health of the soil. They decompose organic matter, returning essential elements to the ecosystem as a result.

Fungal enzymes are active in an acidic environment that mimics the physiology of the human stomach. In vitro, fungi enzymes enhance the digestion of dietary fat, protein, and carbohydrates. The research of digestive deterioration with aging has been established using an adapted in vitro technique.

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The mass of soap formed to satisfy the law of conservation of mass is 918g.

According to the rule of conservation of mass, in a chemical process, mass neither creates nor destroys itself. When coal is burned, for instance, the carbon atom in it transforms into carbon dioxide. Although the carbon atom's shape changes from solid to gas, its mass remains constant.

The mass of the reactants and products in a chemical reaction must equal each other according to the law of conservation of mass.

Fat + sodium hydroxide  = soap + glycerin

890+ 120  = soap  + 92

1010 = soap + 92

soap = 1010 - 92

soap = 918g.

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The statement that correctly compares the weight and the mass of an object is as follows: its weight changes based on location but the mass stays the same (option C).

Weight is the force on an object due to the gravitational attraction between it and the Earth. Weight is a function of an object's mass and it's gravitational force.

Mass, on the other hand, is the quantity of matter which a body contains, irrespective of its bulk or volume. It is one of four fundamental properties of matter and is measured in kilograms in the SI system of measurement.

An object's mass does not change, however, its weight is subjective to changes in location. This means that a ball on Earth will weigh differently from a ball in mars.

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Answer:

67 electrons

Explanation:

Most of the time, the number of protons is the same as the number of electrons because of their relation.

Answer:

yes there R, The Earth’s outer core is in a state of turbulent convection

Explanation:

have good day

Answer:

Technically? Yes. Because the Earth's outer core is in a state of turbulent convection as the result of radioactive heating and chemical differentiation. This sets up a process that is a bit like a naturally occurring electrical generator, where the convective kinetic energy is converted to electrical and magnetic energy.

Explanation:

Brainlest, Please!

Answer

AlBr₃ is the limiting reactant

Explanation

Mass of AlBr₃ = 23.45 g

Mole of AlBr₃ = Mass/molar mass = 23.46 g/266.69 g/mol = 0.08797 mol

Mass of Na₂O = 34.57 g

So mole of Na₂O = mass/molar mass = 34.57 g/61.9789 g/mol = 0.5578 mol

Mole ratio of AlBr₃ to Na₂O = (0.08797/0.08797) : (0.05578/0.08797) = 1:6

To know the limiting reactant, write a chemical equation for the reaction and compare the reactant mole ratio in the equation with the mole ratio above.

2AlBr₃ + 3 Na₂O -----> Al₂O₃ + 6NaBr

Mole ratio in the equation = 2:3

Comparing the mole ratio, AlBr₃ will be the first to be completely consumed.

Therefore, AlBr₃ is the limiting reactant

By exchanging electrons with one another, atoms create new materials. When two atoms share at least one pair of electrons, this is known as a covalent link. Ionic bonds form when positive  are attracted to one another and share an electron as a consequence.

When two atoms share , they establish a  connection. Because the two positively charged atomic nuclei and shared, negatively charged electrons in a covalent bond are attracted to one another by electrostatic forces, the bond is stable.

One or more pairs of electrons from each atom are shared by the other atoms to form a covalent link. The two atomic nuclei are pulling these electrons in opposite directions. When the gap between two atoms' electronegativities is too narrow for an electron transfer to take place and form ions, a covalent bond is created.

Reactants interact with one another in a chemical reaction, breaking the bonds that hold their atoms together.

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Answer:

Here's your answer on the Image!

Explanation:

I took the K-12 Quiz

The difference in the temperature change can be explained by the difference in the specific heat capacity for water (4.186 J/g°C) and the specific heat capacity for the metal you used (metals have small values for specific heat capacities).

Specific heat capacity is a material characteristic that quantifies how much heat (in Joules) is needed to change the temperature of 1 g of the material by a single degree (°C or K). Water has a relatively high specific heat capacity (4.186 J/g°C), which means that you need to add 4.186 Joules of heat to increase the temperature of 1 g of water by 1 °C.

On the other hand, metals have small values for their specific heat capacities (0.900 J/g°C for aluminum, 0.386 J/g°C for copper, 0.420 J/g°C for steel), which means that their temperature will drastically change for the same amount of heat invested or taken away.

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Answer: so the answer will be 25 J

Explanation: The mass is 0.5 kg and the velocity is 10 meters per second. So: KE = (1/2)(0.5)(10)^2. Thus the kinetic energy of the ball is 25 J

Taking into account the reaction stoichiometry, 1 mole of potassium hydroxide would react with 1 mole of hydrochloric acid

In first place, the balanced reaction is:

KOH + HCl  → KCl + H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

You can see that the stoichiometric mole ratio of KOH to that of HCl is 1:1. This means that 1 mole of KOH will require 1 mole of HCl.

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Answer:

a. 25.5 moles of Pb will be formed.

b. 54.8 moles of PbO are needed.

c. PbS is the limiting reactant.

Explanation:

1st) It is necessary to write the balanced chemical reaction:

From the balanced chemical reaction we know that 1 mole of PbS reacts with 2 moles of PbO to produce three moles of Pb and 1 mole of SO2.

2nd) Using the stoichiometry of the reaction and a mathematical rule of three, we can calculate the moles of Pb that will be produced from 17 moles of PbO and excess of PbS:

So, 25.5 moles of Pb will be formed.

3rd) Using the stoichiometry of the reaction and a mathematical rule of three, we can calculate the moles of PbO that are needed to make 27.4 moles of SO2 in excess of PbS:

So, 54.8 moles of PbO are needed.

4th) Using the stoichiometry of the reaction we can calculate the limiting reactant:

- Calculation from 17.6 moles of PbS:

From the stoichiometry of the reaction 1 mol of PbS reacts with 2 moles of PbO, so the 17.6 moles of PbS will need 35.2 moles of PbO to react properly, but we have 36g of PbO, so PbO will be the excess reactant and PbS the limiting reactant.

- Calculation from 36 moles of PbO:

We can do this calculation to confirm the previous one:

In this case, we can see that 36 moles of PbO will need 18 moles of PbS to react properly, but we only have 17.6 moles of PbS. Here we confirm that PbS is the limiting reactant.

Answer:Many of the physical properties of solutions differ significantly from those of the pure substances discussed in earlier chapters, and these differences have important consequences. For example, the limited temperature range of liquid water (0°C–100°C) severely limits its use. Aqueous solutions have both a lower freezing point and a higher boiling point than pure water. Probably one of the most familiar applications of this phenomenon is the addition of ethylene glycol (“antifreeze”) to the water in an automobile radiator.

Explanation:

To find the order of a reaction with respect to one reactant, you will monitor the Percentage as the reactant of product is changed.

To determine the reaction order from experimental data, either the differential rate law or the integrated rate law can be used. In the rate law, the exponents are frequently positive integers: 1 and 2 or even 0. As a result, the reactions in each reactant are of zeroth, first, or second order. Changes in the concentration of the reactants or products can be used to calculate the rate. changes in reactant or product mass or volume If the reaction is the result of multiple reaction steps with different orders, the order of the reaction can be changed by adjusting the reagent concentration. Because the order is often ruled by the slowest reaction, you can manipulate the relative reaction speed by varying the concentrations.

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Answer:

Explanation:

You will watch the Percentage when the reactant of the product is changed in order to determine the sequence of a reaction with respect to one reactant.

Either the differential rate law or the integrated rate law can be used to infer the reaction order from experimental data.

The exponents of the rate law are frequently positive numbers, such as 1 and 2 or even 0.

Because of this, each reactant undergoes reactions of the zeroth, first, or second order.

The rate can be calculated using changes in the concentration of the reactants or products.

A change in the reactant, product, or reactant's volume by changing the reagent concentration, the reaction order can be modified if it involves several steps that have been performed in a different sequence.

You can also control the relative reaction speed by changing the concentrations because the order is frequently determined by the slowest reaction.

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Solar energy is converted into chemical energy i.e. glucose with the help of photosynthesis.

Photosynthesis is the process in which light energy is converted to chemical energy in plant cells. In cellular respiration, plants use the chemical energy that is stored during the process of photosynthesis. Photosynthesis is a process in which plants convert energy from the sun into usable energy that is used by the cells in different activities. Plants use the light energy of the sun, carbon dioxide, and water to make glucose and oxygen. The glucose is stored in different parts of the plant while on the other hand, the oxygen is released in the atmosphere.

So we can conclude that with the help of the photosynthesis process, Solar energy is converted into chemical energy.

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Applying too much sample to the TLC (thin layer chromatography) plate results in reduced separation between the spots.

When performing thin layer chromatography it is necessary to not apply too much of the sample onto the plate. Once the elution solvent starts climbing up the plate, all the components of the sample will be separated along the plate according to the intensity of their interactions with the plate and the solvent (quantified as the Rf value - retention factor).

In a sample that is too concentrated or too much of it has been applied, the separation will be negatively affected because the huge spots originating from the sample components will overlap, making Rf determination difficult, if not impossible.  

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The pH value of the resulting solution is 11.9.

To calculate the pH value of the solution we need to calculate the molarity (c) of the solution, using the number of moles of HCl (n) and the volume of the solution (V = 662 mL = 0.662 L).

c = n/V

To obtain the number of moles of HCl, we are going to use the mass of HCl (m = 18.4 g) and its molar mass (M = 36.5 g/mol):

n = m/M

n = 18.4 g / 36.5 g/mol

n = 0.504 mol

Now we can calculate the molarity:

c = 0.504 mol / 0.662 L

c = 0.761 M

Because HCl is a monoprotic acid, the molarity of the solution is equal to the concentration of H⁺ ions ([H⁺] = 0.761 M), which is important for calculating pH:

pH = -log[H⁺]

pH = -log(0.761)

pH = 11.9

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Aldol condensation is an easy way of making carbon-carbon bond.

In the field of chemistry, we can describe aldol condensation as a type of bond that occurs due to electrophilic substitution at the alpha carbons of the enol.

Aldol condensation is known to be the easiest way for one carbon to form bonds with another carbon.

Such an aldol reaction that takes place between carbonyl compunds instead of aldehydes or enols is referred to as crossed aldol condensation.

Aldol reactions are known to be an important part of synthesizing organic compounds as carbon-carbon bonds are formed due to it.

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To be considered a true hydrate, a compound must follow a few rules, and one of these rules is the color being the same before and after heating. In this case we have a difference in the color, the residue after heating when dissolved in water is forming a yellow brown solution, and in the meanwhile, a colorless solution is formed when a sample of the original compound is dissolved in water, which is not a characteristic of a true hydrate.

Answer:

12.

Explanation:

Beryllium is in Group 2 (Column 2) with the atomic number 4.

The atomic number to the next element in the group would be right below it, Magnesium (Mg). Magnesium has an atomic number 12.

The atomic number is the small number on the top left corner of the square of the element.

Answer:

ngl ts ngl ts ts ngl...imma keep it a buck.96 ion got the answers kanye do.

Explanation:

A compound differs from a mix in that a compound has a definite composition by the mass of the elements it contains. Option C.

A compound may be a substance formed by the chemical combination of two or more elements. a mix is a substance formed by physically mixing two or more substances. a mix is two or more substances that are not chemically combined, and a compound is 2 or more elements that are chemically combined.

This differs from compounds, which are composed of drugs in fixed proportions. Substances during a mixture do not chemically combine to form new substances as compounds do. A compound may be a substance formed by the combination of two other chemical elements. a mix is a substance formed from two or more substances that can be separated using physical methods.

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Answer:

Explantion

Here, we want to get the number of moles in 60 g sample of NaCl

Mathematically, to get this, we have to divide the mass given by the molar mass of NaCl

Thenmolar mass of NaCl is 58.44 g/mol

Thus, we have the number of moles as:

9 = T = 40 degrees Celsius, P = 2 atm is the greatest density

10 = T = 50 degrees Celsius, P = 0.5 atm  is the smallest number of moles of gas .

The gas with the highest atomic mass will be contained in the flask with the highest density.

At constant volume and pressure, the ratio of the gas's moles to the temperature is inverse. Since the temperature was dropped, the flask containing helium will thus contain the most moles of gas.

Pressure and temperature have a straight relationship, PV = nRT, according to the ideal gas law. The pressure will be maximum in the heated helium flask because of this. d.

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Pendulum shows the path it takes as it swings back and forth and it is because of kinetic energy is converted into potential energy only once

Pendulum is the point mass suspended by the weightless and inextensible string fixed rigidly to support pendulum is also used in scientific instrument and it form because of gravity and in that pendulum potential energy is transformed to the kinetic energy and come back again and weight of pendulum is released and then it get active and gravity pull it back and that's why kinetic energy is converted into potential energy only once

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The  effectiveness of columns is the number of theoretical plates, the  the Fractional distillation is separation of a mixture of two liquids.

Fractional distillation divides a mixture into a number of distinct parts known as fractions.

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The molarity of the bromide ion is 0.882 M .

Molar concentration is a measure of the attention of a chemical species, specially of a solute in an answer, in phrases of amount of substance in keeping with unit quantity of solution.

In chemistry, the maximum typically used unit for molarity is the number of moles consistent with liter, Molarity refers to the attention of a compound or ion in a solution, and normality refers back to the molar attention handiest of the acid aspect or handiest of the base component of the solution. therefore, normality gives know-how of the solution's concentration in acid-base reactions.

Pb⁺² + 2Br⁻ => PbBr₂

19.38 ml × 0.5690 M = 11.03 millimoles of Pb⁺²

millimoles of Br⁻  = 2 × millimoles of Pb⁺²

                           = 2 × 11.03

                           = 22.06 millimoles of Br⁻

= 22.06 millimoles/25 ml

molarity = 0.882 M in Br⁻.

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