Stoichiometry Practice

How do you calculate the percent yield of a reaction?

• Percent Yield = (Actual Yield / Theoretical Yield) x 100.

• Percent Yield = (Theoretical Yield / Actual Yield) x 100.

• Percent Yield = Actual Yield + Theoretical Yield.

• Percent Yield = (Actual Yield - Theoretical Yield) x 100.

Given the reaction CH4 + 2O2 → 2H2O + CO2, how much CO2 is produced from 35g of O2?

• 12.0 g

• 18.5 g

• 24.1 g

• 30.0 g

What is the role of the periodic table in stoichiometry?

• It provides atomic masses needed for calculations.

• It lists all known chemical reactions.

• It shows the arrangement of electrons in an atom.

• It indicates the solubility of compounds.

How many moles of Fe can be produced from 6 moles of H2 in the reaction Fe2O3 + 3H2 → 2Fe + 3H2O?

• 2 moles Fe

• 4 moles Fe

• 6 moles Fe

• 8 moles Fe

What is the molar mass of C6H12O6?

• 150.12 g/mol

• 180.18 g/mol

• 200.00 g/mol

• 165.25 g/mol

How do you find the molar mass of a compound?

• Multiply the number of atoms by their atomic mass.

• Add the atomic masses of all atoms in the compound.

• Divide the total mass by the number of atoms.

• Subtract the atomic mass of the lightest atom from the heaviest.

How do you convert grams to moles?

• Moles = grams / molar mass.

• Moles = grams x molar mass.

• Moles = grams + molar mass.

• Moles = grams - molar mass.

What is the purpose of using coefficients in a balanced equation?

• Coefficients indicate the relative amounts of reactants and products.

• Coefficients are used to balance the charges in a reaction.

• Coefficients represent the temperature at which a reaction occurs.

• Coefficients are used to identify the state of matter of each substance.

What is the first step in solving a stoichiometry problem?

• Write a Balanced Equation.

• Identify the limiting reactant.

• Calculate the molar mass of reactants.

• Determine the final temperature of the reaction.

What is the significance of a balanced chemical equation?

• It ensures the law of conservation of mass is followed.

• It allows for the prediction of reaction rates.

• It indicates the temperature at which a reaction occurs.

• It shows the physical states of the reactants and products.