Mole to Mole Stoichiometry Practice

What is stoichiometry?

• A method for measuring temperature in chemical reactions.

• The branch of chemistry that deals with the calculation of reactants and products in chemical reactions based on the balanced chemical equations.

• A technique used to separate mixtures in chemistry.

• The study of the properties and behavior of gases.

Tags

NGSS.HS-PS1-7

What is the mole ratio of NH3 to O2 in the reaction 4NH3 + 5O2 -> 4NO + 6H2O?

• 4:5

• 3:5

• 2:5

• 5:4

How many moles of Li2SO3 are needed to react with 0.0589 moles of BF3?

• 0.0884 moles of Li2SO3 are needed.

• 0.0589 moles of Li2SO3 are needed.

• 0.1178 moles of Li2SO3 are needed.

• 0.0442 moles of Li2SO3 are needed.

If 0.685 moles of H2O are produced, how many moles of O2 are needed?

• 0.751 moles of O2 are needed.

• 0.851 moles of O2 are needed.

• 0.951 moles of O2 are needed.

• 1.051 moles of O2 are needed.

Tags

NGSS.HS-PS1-7

What is the mole ratio of Li2SO3 to BF3 in the reaction 2BF3 + 3Li2SO3 -> B2(SO3)3 + 6LiF?

• 1:1

• 2:3

• 3:2

• 4:5

Tags

NGSS.HS-PS1-7

What does a balanced chemical equation represent?

• A representation of the conservation of mass, showing that the number of atoms of each element is the same on both sides of the equation.

• An equation that shows the speed of a chemical reaction.

• A formula that indicates the temperature at which a reaction occurs.

• A statement that describes the physical state of reactants and products.

If 11.98 moles of H2O are produced, how many moles of CO2 are produced?

• 8.50 moles of CO2 are produced.

• 10.65 moles of CO2 are produced.

• 12.00 moles of CO2 are produced.

• 9.75 moles of CO2 are produced.

What is the mole ratio of O2 to H2O in the combustion of octane?

• 20:16

• 25:18

• 30:24

• 15:12

Tags

NGSS.HS-PS1-7

What is the significance of mole ratios in stoichiometry?

• Mole ratios are used to convert between moles of reactants and products in chemical reactions.

• Mole ratios determine the temperature at which a reaction occurs.

• Mole ratios are used to calculate the pressure of gases in a reaction.

• Mole ratios indicate the color change during a chemical reaction.

Tags

NGSS.HS-PS1-7

If 8.056 moles of B2(SO3)3 are produced, how many moles of Li2SO3 must have reacted?

• 20.00 moles of Li2SO3 must have reacted.

• 22.50 moles of Li2SO3 must have reacted.

• 24.17 moles of Li2SO3 must have reacted.

• 26.00 moles of Li2SO3 must have reacted.

Tags

NGSS.HS-PS1-7