Answer:
Alkanes have only single bonds between carbon atoms. Alkenes have at least one carbon-carbon double bond. When trying to determine which is which in a lab setting, you can use bromine water. When mixed with an alkane, it will remain orange, but when mixed with an alkene, it turns colorless.
explain why a diazonium group on a benzene ring cannot be used to direct an incoming substituent to the meta position.
Answer: The reason a diazonium group on a benzene ring cannot be used to direct an incoming substituent to the meta position is due to the fact that diazonium groups are highly reactive and unstable. When they are present on the benzene ring, they tend to undergo rapid chemical reactions, which cause them to be quickly removed from the ring.
This means that they cannot effectively direct incoming substituents to the meta position, as they are not present long enough to exert a significant effect on the reaction. Additionally, the highly reactive nature of diazonium groups makes them prone to react with other reagents in the reaction, which can cause unwanted side reactions and limit the efficiency of the overall reaction.
In conclusion, a diazonium group on a benzene ring cannot be used to direct an incoming substituent to the meta position due to their highly reactive and unstable nature, which causes them to undergo rapid chemical reactions and limits their ability to effectively direct the reaction.
Learn more about diazonium group here:
https://brainly.com/question/29357767#
#SPJ11
rank the steps in the sn1 mechanism proposed for the reaction of tert-butyl alcohol with hx.need help? review these concept resources.
The SN1 mechanism for the reaction of tert-butyl alcohol with aqueous HX involves the formation of an intermediate carbocation, which is then attacked by a halide ion (H⁻) to form the alkyl halide product.
The steps involved in the mechanism of the SN1 Reaction of tert-butyl alcohol with HX is as follows:Step 1:The reaction begins with the protonation of the tert-butyl alcohol molecule by HX.
Step 2: The highly reactive carbocation intermediate then undergoes loss of a leaving group, water(H₂O) resulting in the formation of the carbocation species, t-C₄H₉⁺.
Step 3: Subsequently, a halide ion from HX performs a nucleophilic attack on the carbocation species, forming the alkyl halide product, tert-C₄H₉X , and a hydronium ion.
Step 4: The reaction reaches completion with the release of the hydronium ion and the formation of the alkyl halide product.
To know more about SN1 mechanism here
https://brainly.com/question/30598974
#SPJ4
Give the empirical formula of a hydrocarbon that when 60.68 g is combusted in the presence of oxygen and produces 89.12 grams of CO2CO2 and 36.48 g of H2OH2O.
Write the formula with the atoms in the order CxHyOz. You can ignore the charge and phase.
Explanation :
The empirical formula of a hydrocarbon is C3H8 when 60.68 g are combusted in the presence of oxygen and produce 89.12 g of CO2 and 36.48 g of H2O.
The empirical formula of a compound represents the simplest ratio of atoms present in a compound. We are given that a hydrocarbon is burned and is producing carbon dioxide and water.
Therefore, the following reaction takes place:
CxHy + O2 → CO2 + H2O
We are given the mass of the hydrocarbon and the products produced. We have to calculate the empirical formula of the compound using the following steps:
First,
We have to find the moles of CO2 and H2O produced.Using the molar mass of CO2 = 44 g/molNumber of moles of CO2 produced = 89.12/44 = 2.02 molUsing the molar mass of H2O = 18 g/molNumber of moles of H2O produced = 36.48/18 = 2.03 molSecondly,
We need to determine the number of moles of C and H atoms present in the compound.Thirdly,
We need to convert the number of moles of each element to whole numbers by dividing by the smallest number of moles.Number of moles of C/0.67 = 2.02/0.67 = 3 Number of moles of H/0.67 = 4.06/0.67 = 6Therefore, the empirical formula of the compound is C3H8.
To know more about the empirical formula https://brainly.com/question/14044066
#SPJ11
what physical process is primarily responsible for the purification achieved during recrystallization?
The physical process that is primarily responsible for the purification achieved during recrystallization is the process of selective solubility.
The process of selective solubility refers to the ability of a substance to selectively dissolve in a particular solvent or a combination of solvents. The substance that is more soluble in a solvent will dissolve in that solvent while the impurities that are less soluble will remain undissolved.
The process of recrystallization is used to purify a solid that contains impurities. In this process, a solid is dissolved in a solvent that is heated to the boiling point. Once the solution is saturated, it is cooled slowly, and crystals are allowed to form. During recrystallization, the impurities are excluded from the growing crystals because of their lower solubility in the solvent, and the crystals that form are pure.
Therefore, the process of selective solubility is primarily responsible for the purification achieved during recrystallization.
Learn more about selective solubility here: https://brainly.com/question/13198024.
#SPJ11
A gas takes up a volume of 17L, has a pressure of 2. 3atm, and a temperature of 299K. If I raise the temperature to 350K and lower the pressure to 1. 5atm, what is the new volume of the gas?
The new volume of the gas is approximately 29.5 L when the temperature is raised to 350K and the pressure is lowered to 1.5 atm.
To solve this problem, we can use the combined gas law, which states that,
(P1 × V1) / T1 = (P2 × V2) / T2
where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively.
We can plug in the given values to get,
(2.3 atm × 17 L) / 299 K = (1.5 atm × V2) / 350 K
Solving for V2,
V2 = (2.3 atm × 17 L × 350 K) / (1.5 atm × 299 K)
V2 = 29.5 L
To know more about volume, here
brainly.com/question/20319705
#SPJ4
which of the following could be the direct product obtained from dehydration of an alcohol?multiple choice question.structure astructure bstructure dstructure c
The direct product obtained from dehydration of an alcohol is an alkene. (A)
Alkenes are hydrocarbons composed of a double bond between two carbon atoms. The dehydration of an alcohol involves the removal of a water molecule from two hydrogen atoms and an oxygen atom in the alcohol. (A)
This produces an alkene with an alkyl group attached to each carbon atom in the double bond.
A dehydration reaction involves the removal of a molecule of water from a compound. In the case of an alcohol, this typically involves the removal of the hydroxyl (-OH) group and a hydrogen atom from adjacent carbon atoms.
The resulting molecule is an alkene, which contains a double bond between the two carbon atoms that were previously bonded to the -OH group and the hydrogen atom.
To know more about dehydration click on below link:
https://brainly.com/question/12261974#
#SPJ11
complete question
which of the following could be the direct product obtained from dehydration of an alcohol.
A) Alkene
B) Alkane
C) Alkyne
D) Ketone
suppose the 1h nmr spectrum shown below is obtained from a reaction product of a student who wanted to make acetyl ferrocene from ferrocene, what can you say about the product?
Answer: The 1H NMR spectrum shown below is most likely that of the product obtained from a reaction of ferrocene and acetic anhydride.
The spectrum displays a single peak at 6.6 ppm, which is characteristic of a vinyl proton in a substituted cyclopentadienyl ring. The peak at 5.2 ppm is that of a methylene protons in the acyl substituent. The peak at 1.2 ppm is that of a proton attached to a tertiary carbon. This strongly suggests that the student has successfully synthesized acetyl ferrocene.
Acetyl ferrocene is a stable compound, containing a cyclopentadienyl ring with an acyl substituent attached at one of the ring carbons. It is synthesized by reacting ferrocene with acetic anhydride, a reaction that requires heating. The reaction leads to the substitution of a proton in the cyclopentadienyl ring by an acyl group, resulting in acetyl ferrocene.
The 1H NMR spectrum of this product contains a single peak at 6.6 ppm, indicating the presence of a vinyl proton in the cyclopentadienyl ring, a peak at 5.2 ppm, indicating the presence of a methylene protons in the acyl substituent, and a peak at 1.2 ppm, indicating the presence of a proton attached to a tertiary carbon.
Therefore, it can be concluded that the student has successfully synthesized acetyl ferrocene from ferrocene using acetic anhydride.
Learn more about methylene protons here:
https://brainly.com/question/29585359#
#SPJ11
How many grams of carbon monoxide does a 3.0-L balloon contain?
If the balloon is popped and all of the CO2 is released, approximately 5.4 grams of CO2 would be released.
What is STP?At STP (Standard Temperature and Pressure), the pressure is 1 atmosphere (atm) and the temperature is 273.15 K (0 °C or 32 °F).Any ideal gas has a molar volume of 22.4 L/mol at STP.
Carbon dioxide (CO2) seems to have a molar mass of approximately 44 g/mol.
Using the ideal gas law, PV = nRT, we can calculate the number of moles of CO2 in the balloon:
PV = nRT
n = PV/RT
n = (1 atm)(3 L)/(0.0821 L·atm/mol·K)(273.15 K)
n = 0.1226 mol
Therefore, the balloon contains 0.1226 mol of CO2.
To calculate the mass of CO2, we can use the following formula:
mass equates to the number of moles multiplied by the molar massmass = 0.1226 mol x 44 g/mol
mass = 5.4 g
To know more about ideal gas law, visit:
https://brainly.com/question/28257995
#SPJ1
what is necessary for extraction? group of answer choices two phases in which the solute is equally soluble higher solute solubility in the second phase lower solute solubility in the second phase two phases in which the solute is equally insoluble
For extraction, there should be an option c) lower solute solubility in the second phase.
Extraction is a process in which a solute is separated from a solution or mixture by two immiscible liquid phases. It involves two phases in which the solute has different solubilities.
In the first phase, the solute has higher solubility, meaning it dissolves more readily.
In the second phase, the solute has lower solubility, meaning it is less likely to dissolve.
In order for extraction to be successful, the solute must be differently soluble in the phases. This ensures that the solute is separated efficiently and effectively.
The process of extraction involves the formation of two liquid phases and the transfer of the solute from one phase to the other. The solute is transferred from the first phase to the second phase, where it is separated from the solution.
To summarize, extraction is a process of separating a solute from a solution or mixture by two immiscible liquid phases. It involves two phases in which the solute has different solubilities.
Therefore, for extraction, it is necessary for the solute to have a lower solubility in the second phase. and hence the correct answer is option c.
To know more about extraction, refer here:
https://brainly.com/question/12910778#
#SPJ11
methane decomposes into two simpler substances, hydrogen and carbon. therefore, methane is a(n) .
Answer:
Methane is a compound that consists of one carbon atom and four hydrogen atoms per molecule. Methane decomposes into two simpler substances, hydrogen and carbon. Therefore, methane is a compound.
What is Methane?
Methane is a colorless, odorless, and flammable gas that has a molecular formula of CH4. Methane is the primary component of natural gas, which is formed from the decay of organic matter deep beneath the Earth's surface.
Methane is a potent greenhouse gas that is more effective at trapping heat than carbon dioxide, despite the fact that it does not remain in the atmosphere for as long.
A component is a pure substance that cannot be separated into simpler substances by physical or chemical methods. Elements and compounds are the two types of components.
Elements are the simplest forms of matter and cannot be separated into simpler substances by chemical means. On the other hand, compounds are made up of two or more elements in definite proportions and can be separated into simpler substances by chemical means.
Thus, methane is a compound.
Learn more about compounds and elements here:
https://brainly.com/question/13516179#
#SPJ11
PLEASEEEEEEEEE HELP MEEEE AND EXPLAINNNNN
if the temperature of a gas in a container is doubled, the pressure is . select one: a. reduced by four times b. halved c. increased by four times d. doubled
The temperature of a gas in a container is doubled, the pressure is: option (D) states "Doubled".
The relationship between the pressure and temperature of a gas is described by Gay-Lussac's law, which states that if the temperature of a gas in a container is doubled, the pressure is doubled as well. Hence, the answer is (d) doubled.
Explanation:In a closed container, the gas molecules move around randomly, colliding with each other and with the walls of the container. The pressure of the gas is determined by the frequency and force of these collisions, which in turn depend on the speed and number of gas molecules present in the container.
When the temperature of the gas is increased, the kinetic energy of the gas molecules also increases, causing them to move faster and collide more frequently with each other and with the walls of the container. This leads to an increase in the pressure of the gas.
Similarly, when the temperature of the gas is decreased, the gas molecules slow down and collide less frequently, leading to a decrease in the pressure of the gas. This relationship between pressure and temperature is known as the ideal gas law, which is expressed mathematically as:
[tex]P = nRT/V,[/tex]
where P is the pressure of the gas, n is the number of gas molecules, R is the ideal gas constant, T is the temperature of the gas in Kelvin, and V is the volume of the container.
To know more about pressure refer here:
https://brainly.com/question/28907914#
#SPJ11
6.0 mol NaOH can form
3.0 mol Na3PO4 while 9.0 mole H3PO4
can form 9.0 mol Na3PO4. What mass of
Na3PO4 forms?
Na3PO4: 164 g/mol
[?] g Na3PO4
Round your answer to the ones place.
g NasPO4
Answer:
1) 492 grams Na3PO4
2) 1,476 grams Na3PO4
Explanation:
6.0 mol NaOH forms 3.0 mol Na3PO4
9.0 mole H3PO4 forms 9.0 mol Na3PO4.
What mass of Na3PO4 forms?
1) 6.0 moles of NaOH
3.0 moles of Na3PO4 are formed. Convert thism into grams using the molar mass conversion factor: 164 g/mole
(3.0 moles Na3PO4)*(164 g/mole Na3PO4) = 492 grams
2) 9.0 moles of H3PO4
9.0 moles of Na3PO4 are formed. Again, use the molar mass conversion factor.
(9.0 moles Na3PO4)*(164 g/mole Na3PO4) = 1,476 grams Na3PO4
at a fixed temperature and number of moles of nitrogen gas, its volume and pressure are 148 ml and 743 torr, respectively. what is the final pressure in torr, if the final volume is 214 ml?
The final pressure of nitrogen gas, at a fixed temperature and number of moles, with a final volume of 214 ml is 552 torr.
The pressure and volume of an ideal gas are inversely proportional to each other, meaning if one increases, the other decreases. This can be expressed by the equation PV=nRT, where n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
Since n and T remain constant, the equation can be rearranged to solve for pressure as P=nRT/V. Using the given values, P= (1)(0.08206)(273.15)/(214 ml) = 552 torr.
Thus, the final pressure of nitrogen gas at a fixed temperature and number of moles, with a final volume of 214 ml is 552 torr.
To know more about final pressure click on below link:
https://brainly.com/question/28526047#
#SPJ11
given that burning a 1 gram carbohydrate sample raised the temperature of the 500 gram water bath by 8oc, calculate how much heat energy was released by the carbohydrate sample.
The burning of 1 gram carbohydrate release 16,736 J of heat energy.
Burning a 1 gram carbohydrate sample raised the temperature of the 500 gram water bath by 8°C, to calculate how much heat energy was released by the carbohydrate sample, we can use the specific heat capacity of water which is 4.18 J/g°C.
The heat energy released by the carbohydrate sample can be calculated using the following equation:
Heat energy (J) = mass of water (g) × specific heat capacity of water × ΔTHeat energy
In this case, the calculation is as follows:
Heat energy (J) = 500 g x 8°C x 4.184 = 16,736 J
Therefore, burning a 1 gram carbohydrate sample raised the temperature of the 500 gram water bath by 8°C and released 16,736 J of heat energy.
Learn more about heat energy: https://brainly.com/question/878982
#SPJ11
how could you perform an experiment by adjusting the ionic concentrations to determine the cause of the resting potential?
To perform an experiment to determine the cause of the resting potential by adjusting the ionic concentrations, you will need to complete the following steps.
First, you should set up the appropriate apparatus for the experiment. This will include a solution chamber, an electrode, a reference electrode, and a recording device.
Second, you should prepare the solutions in the chamber, adjusting the concentrations of the various ions. You may want to begin with a balanced solution, then adjust one of the ions while keeping the others constant.
Third, you should measure the resting potential of the cell. Record the values of the resting potential as you adjust the ion concentrations.
Fourth, you should analyze the data. You can look for correlations between the resting potential and the concentration of the ions.
Finally, you should form a conclusion. From your data, you should be able to determine which ion(s) are responsible for the resting potential.
By following these steps, you can conduct an experiment to determine the cause of the resting potential by adjusting the ionic concentrations.
To know more about resting potential click on below link :
https://brainly.com/question/20277449#
#SPJ11
after pressing a heat treatment operation performed on the compact to bond metallic particles is know as:
Answer: The heat treatment operation performed on the compact to bond metallic particles is known as sintering.
What is sintering?
Sintering is a heat treatment process in which particles of a material are compressed into a strong mass, typically by heat but sometimes by pressure or other means. This process is mostly used for manufacturing ceramics, metals, and plastics.
The goal of sintering is to make a material more durable and compact, and it can be done in several ways.In general, sintering is used to manufacture components that are strong, resistant to wear and tear, and have high heat resistance.
Because sintering involves the use of heat, it can be used to remove defects from materials and create components with high dimensional accuracy.
In addition, sintering can be used to produce a wide range of shapes and sizes, making it a versatile manufacturing technique.
Learn more about sintering here:
https://brainly.com/question/30906950#
#SPJ11
The vaporization of
from the liquid to the gas state requires 7.4 kcal/mol (31.0 kJ/mol).
What is the sign of
for this process? Write a reaction showing heat as a product or reactant.
How many kilocalories are needed to vaporize 5.8 mol of
How many kilojoules are needed to evaporate 82 g of
Evaporation is a different term for it. As particles move more quickly than liquid molecules, a liquid needs energy to transform into a gas.
What is the liquid vaporisation process?vaporisation is the process by which a substance is transformed from its liquid or solid state into its gaseous (vapour) state. Boiling is the term for the vaporisation process when conditions permit the creation of gas bubbles within a liquid. Sublimation is the process of directly converting a solid into a vapour.
How fast does vaporisation occur?The ratio of the time needed to evaporate a testing solvent to the time needed to evaporate a reference solvent under the same circumstances is the evaporation rate. The findings can be shown as either a percentage of the total amount evaporated within a given time frame, the amount of time needed to evaporate, or a relative rate.
To know more about energy visit:
https://brainly.com/question/8630757
#SPJ1
which one of the following molecules has the highest molecular weight? group of answer choices acetyl coa alpha-ketoglutarate. oxaloacetate citrate isocitrate
the mass of a single atom of an element which has only one stable isotope is 1.79*10^-22 grams. what is the atomic weight of the element
The atomic weight of the element is 1.79 × 10-22 grams
The atomic weight of an element is the average mass of its atoms relative to the mass of an atom of carbon-12, which is defined as 12.0000 atomic mass units (amu).
Since the element has only one stable isotope, its atomic weight is equal to the mass of a single atom of the element in amu.
Converting the given mass of a single atom from grams to amu:
1.79 x 10^-22 g x (1 amu / 1.66054 x 10^-24 g) = 1.079 amu
Therefore, the atomic weight of the element is 1.079 amu.
To know more about atomic weight click here:
https://brainly.com/question/13000210
#SPJ11
in addition to the iron ores, what are the two other solid raw materials used to produce iron and steel?
Answer: The two other solid raw materials used to produce iron and steel in addition to the iron ores are limestone and coke.
What is iron and steel production?
Iron and steel production is the method of extracting iron from iron ores and refining it into a useful alloy. The raw materials, iron ore, limestone, and coke, are converted into raw iron, which is then converted into steel in a second process.
The process of Iron and steel production
The iron ores, coke, and limestone are obtained from natural resources. After that, the iron ores, coke, and limestone are moved to a blast furnace. The limestone is used as a flux, which helps to extract the iron from the ore. The coke serves as a fuel and decreases the iron ore's melting temperature.
The iron ore is then melted at high temperatures in a blast furnace, where it reacts with coke to produce iron. This is the raw iron. It is then cooled down and transferred to a second furnace where steel is produced. Finally, the steel is processed into the final product or shipped out as raw steel.
The process of iron and steel production is complex, and it requires a lot of energy. It is also responsible for producing a lot of pollution. The industry has worked hard to improve efficiency and environmental performance by using more advanced technologies and cleaner fuels.
Learn more about iron ore here:
https://brainly.com/question/18649046#
#SPJ11
The Air Quality Index (AQI) informs the public about which of the following?
Responses
weekly air quality averages
weekly air quality averages
daily air quality levels
daily air quality levels
amount of particulate matter in the air
amount of particulate matter in the air
size of particulate matter in the air
Explanation:
The Air Quality Index (AQI) informs the public about daily air quality levels, including the amount and size of particulate matter in the air. It provides a standardized measurement to help people understand how clean or polluted the air is in their area and how it may affect their health. The AQI typically reports levels of common air pollutants such as ground-level ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. The AQI scale ranges from 0 to 500, with higher values indicating more severe air pollution and greater potential health effects.
given 7.00 g of butanoic acid and excess ethanol, how many grams of ethyl butyrate would be synthesized, assuming a complete 100 % yield?
Answer:
The reaction between butanoic acid and ethanol produces ethyl butyrate and water, and the balanced chemical equation is:
Butanoic acid + Ethanol → Ethyl butyrate + Water
The molar mass of butanoic acid is 88.1 g/mol, and the molar mass of ethanol is 46.1 g/mol. The molar mass of ethyl butyrate is 116.2 g/mol.
To determine the amount of ethyl butyrate produced, we need to use stoichiometry and the given mass of butanoic acid to find the number of moles of butanoic acid, and then use the mole ratio to find the number of moles (and mass) of ethyl butyrate produced.
Calculate the number of moles of butanoic acid:
moles of butanoic acid = mass/molar mass = 7.00 g / 88.1 g/mol = 0.0795 mol
Use the mole ratio to find the number of moles of ethyl butyrate produced:
From the balanced equation, we see that 1 mole of butanoic acid reacts with 1 mole of ethanol to produce 1 mole of ethyl butyrate.
So, the number of moles of ethyl butyrate produced = 0.0795 mol (since we assume a 100% yield)
Calculate the mass of ethyl butyrate produced:
mass of ethyl butyrate = moles x molar mass = 0.0795 mol x 116.2 g/mol = 9.23 g
Therefore, 9.23 grams of ethyl butyrate would be synthesized if 7.00 grams of butanoic acid were reacted with excess ethanol, assuming a complete 100% yield.
what volume of a soft drink that is 10.5% sucrose (c12h22o11) by mass contains 78.5 g of sucrose? the density of the solution is 1.04 g/ml.
The volume of the soft drink that is 10.5% sucrose by mass is 718.86 mL.
To find the volume of a soft drink that contains 78.5 g of sucrose (C₁₂H₂O₁₁) with 10.5% sucrose by mass, we can start by calculating the total mass of the solution. This can be calculated using the following equation:
total mass = 78.5 g / 0.105 = 747.619 g
The 10.5% sucrose by mass means that for every 100 g of the soft drink, 10.5 g is sucrose.
As the density of the solution is 1.04 g/mL, the volume of the solution is calculated by dividing the mass of solution by the density of the solution.
V = 747.619 g / 1.04 g/mL = 718.86 mL
Therefore, the volume of the soft drink is 718.86 mL.
It is important to note that the calculation used in this example assumes that the sucrose (C₁₂H₂O₁₁) is the only solute in the solution. If there are other solutes present in the solution, then the calculation needs to be adjusted accordingly.
Learn more about density here: https://brainly.com/question/1354972.
#SPJ11
PLSSS HELP STUCK ON THIS LAB REPORT AND 39PTS I REALLY DON'T DO QUESTIONS BECAUSE IT TAKES AWAY MY PTS BUT THIS NEEDS HELP (Also due before 4:00 pm)
To familiarize students with experimental tools, the scientific method, and data analysis techniques so that they can understand the inductive process that led to the concepts.
What is the experimental summary in Section I?Give a complete sentence description of each stage of the process. It also offers possible explanations (your hypothesis(es)) for what you anticipated the experiment to show. There should be one to three paragraphs in this part.
What significance does experimental study have?Before moving the study into clinical trials, experimental research enables you to test your hypothesis in a controlled setting. Additionally, it offers the best way to test your hypothesis due to the following benefits.
To know more about scientific method visit:-
https://brainly.com/question/26694164
#SPJ1
Which particle represents the size of the bromide ion compared to the bromine atom? Help please!
Because of the addition of one electron, the effective nuclear charge falls and repulsion rises, causing electrons to be further apart and therefore increasing atomic size. We also know that anion has a bigger size than the parent atom, therefore Br- will have the highest atomic size.
Why is bromide greater than bromine?The radius of the bromide ion Br- is greater.
Anions are more massive than their parent atoms. The anion's extra electron increases electron-electron repulsion. Since electrons spread out further in space, an anion has a wider radius than its parent atom.
Bromine belongs to the halogen group, which also contains fluorine, chlorine, iodine, and astatine.
learn more about bromide
https://brainly.com/question/29228517
#SPJ1
Answer:
C
Explanation: Your welcome
paolo added 7.9 ml of 4.3 m naoh to 4.6 ml of 0.74 m hcl. calculate the concentration, in units of m, of excess oh- in the resulting solution.
The concentration of excess OH- in the resulting solution is 2.15 M.
To calculate this, the amounts of NaOH and HCl must be determined in moles first. For NaOH, 7.9 mL of a 4.3 M solution is equivalent to 33.87 mmol. For HCl, 4.6 mL of a 0.74 M solution is equivalent to 3.444 mmol.
Since the moles of NaOH is greater than the moles of HCl, the concentration of excess OH- is equal to the moles of NaOH divided by the total volume of the solution. Therefore, the concentration of OH- is equal to 33.87/[(7.9+4.6) mL] = 2.15 M.
To calculate the concentration of excess OH- in the solution, the amount of NaOH and HCl present must be determined in moles first. To do this, the volume and molarity of each reactant is used.
The volume of each reactant is given, as well as the molarity of each reactant. By multiplying the volume of each reactant by its molarity, the moles of each reactant is calculated.
Since the moles of NaOH is greater than the moles of HCl, the concentration of excess OH- is equal to the moles of NaOH divided by the total volume of the solution. This can then be calculated to determine the concentration of excess OH- in the solution.
To know more about moles click on below link:
https://brainly.com/question/26416088#
#SPJ11
What l formation does the first digit of VSEPR number provide?
The VSEPR (Valence Shell Electron Pair Repulsion) theory is used to predict the shapes of molecules based on the arrangement of electron pairs around the central atom.
The VSEPR theory assigns a numerical value, called the "VSEPR number", to each central atom in a molecule.
The first digit of the VSEPR number corresponds to the number of electron pairs around the central atom that are involved in bonding. Specifically:
A VSEPR number of 2 indicates that the central atom has 2 electron pairs involved in bonding (e.g. linear geometry).A VSEPR number of 3 indicates that the central atom has 3 electron pairs involved in bonding (e.g. trigonal planar or pyramidal geometry).A VSEPR number of 4 indicates that the central atom has 4 electron pairs involved in bonding (e.g. tetrahedral or square planar geometry).A VSEPR number of 5 indicates that the central atom has 5 electron pairs involved in bonding (e.g. trigonal bipyramidal geometry).A VSEPR number of 6 indicates that the central atom has 6 electron pairs involved in bonding (e.g. octahedral or square pyramidal geometry).The first digit of the VSEPR number is used to determine the general electron pair geometry around the central atom, which is a crucial factor in determining the molecular geometry of the molecule.
Learn more about VSEPR,
https://brainly.com/question/29756299
#SPJ4
how many grams of h2o will be formed when 32.0 g h2 is mixed with 12.0 g of o2 and allowed to react to form water?
When 32.0 g of H2 and 12.0 g of O2 are mixed and allowed to react to form water, the end result will be 44.0 g of H2O.
This is because the equation for the reaction is 2H2 + O2 = 2H2O, so for every two grams of H2 that are present, one gram of O2 must be present to balance the equation. Therefore, 32.0 g of H2 and 12.0 g of O2 will result in 44.0 g of H2O.
To solve this problem, first calculate the amount of H2 and O2 needed to create the desired amount of H2O. Using the equation, the ratio of H2 to O2 is 2:1, so the total amount of O2 needed to react with the given amount of H2 is 16.0 g (32.0 g of H2 divided by 2). Next, calculate the amount of H2O that will be produced. To do this, use the equation 2H2 + O2 = 2H2O, so the total amount of H2O produced is twice the amount of H2 and O2, or 44.0 g (32.0 g of H2 + 16.0 g of O2 = 48.0 g, then divided by 2 = 24.0 g).
Therefore, when 32.0 g of H2 and 12.0 g of O2 are mixed and allowed to react to form water, the end result will be 44.0 g of H2O.
For more such questions on H2O
https://brainly.com/question/26709403
#SPJ11
the element antimony has two stable isotopes, antimony-121 with a mass of 120.90 u and antimony-123 with a mass of 122.90 u. from the atomic mass of sb, 121.76 u, one can conclude that:
From the atomic mass of Sb, 121.76 u, one can conclude that the element antimony has more of isotope Antimony-123.
Explanation:
Antimony is an element that has two stable isotopes:
antimony-121 and antimony-123 with masses of 120.90 u and 122.90 u, respectively. The atomic mass of Sb, 121.76 u, can be used to conclude that antimony has a greater percentage of antimony-123 than antimony-121.
Let's calculate the percentage of antimony-121 and antimony-123 in antimony as follows:
Suppose x is the percentage of antimony-121, and (100 - x) is the percentage of antimony-123 in antimony.
At this point, we can use the average atomic mass of antimony and mass of antimony-121 and antimony-123 to calculate x as follows:
x = ((121.76 u) - (122.90 u) (100 - x)) / (120.90 u - 122.90 u) = (121.76 u - 122.90 u + 122.90 x) / (-2.00 u) = (122.90 x - 1.14 u)
/-2.00 u Solving for x gives x = 42.7%
Therefore, we can conclude that antimony has more of isotope Antimony-123.
To know more about antimony, refer here:
https://brainly.com/question/24201366#
#SPJ11