Mole to Mole Stoichiometry Practice

Front

What is stoichiometry?

Back

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

Front

What does a balanced chemical equation represent?

Back

A balanced chemical equation represents the conservation of mass, showing that the number of atoms of each element is the same on both sides of the equation.

Front

How do you determine the mole ratio from a balanced equation?

Back

The mole ratio is determined by the coefficients in front of the reactants and products in a balanced chemical equation.

Front

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

Back

The mole ratio of O2 to H2O in the combustion of octane (2C8H18 + 25O2 -> 16CO2 + 18H2O) is 25:18.

Front

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

Back

0.951 moles of O2 are needed.

Front

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

Back

The mole ratio of NH3 to O2 is 4:5.

Front

How many moles of O2 are needed to produce 25.69 moles of H2O?

Back

21.41 moles of O2 are needed.

Front

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

Back

The mole ratio of Li2SO3 to BF3 is 3:2.

Front

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

Back

24.17 moles of Li2SO3 must have reacted.

Front

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

Back

0.0884 moles of Li2SO3 are needed.