Mole Ratios & Mole to Mole Calculations

Front

What is a mole ratio?

Back

A mole ratio is a ratio that relates the amounts in moles of any two compounds involved in a chemical reaction, derived from the coefficients of a balanced chemical equation.

Front

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

Back

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

Front

Using the equation: Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l), how many moles of Fe can be produced from 6 moles of H2?

Back

4 moles Fe.

Front

Using the equation: 2H2 + O2 → 2H2O, how many moles of H2O are produced from 8 moles of H2?

Back

8 moles H2O.

Front

What is the mole ratio of ethane (C2H6) to oxygen (O2) in the reaction: 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

The mole ratio of ethane to oxygen is 2:7.

Front

How many moles of CO2 are produced when 17.5 moles of O2 react fully in the reaction: 2 C2H6 + 7 O2 → 4 CO2 + 6 H2O?

Back

10.0 moles CO2.

Front

What is the significance of coefficients in a balanced chemical equation?

Back

Coefficients indicate the number of moles of each substance involved in the reaction, which are used to determine mole ratios.

Front

If 3 moles of H2 react, how many moles of O2 are needed in the reaction: 2H2 + O2 → 2H2O?

Back

1.5 moles O2 are needed.

Front

In the reaction: 4Fe + 3O2 → 2Fe2O3, what is the mole ratio of Fe to O2?

Back

The mole ratio of Fe to O2 is 4:3.

Front

What is the mole-to-mole conversion?

Back

Mole-to-mole conversion is the process of using mole ratios from a balanced equation to convert between moles of reactants and products.