Mole ratios

Front

What is a mole ratio?

Back

A mole ratio is a ratio that shows the relative amounts of moles of reactants and products in a balanced chemical equation.

Front

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

Back

To determine the mole ratio, look at the coefficients in front of each substance in the balanced equation.

Front

In the reaction 2Na + S → Na2S, what is the mole ratio of Na to Na2S?

Back

The mole ratio of Na to Na2S is 2:1.

Front

In the reaction 6CO2 + 6H2O → C6H12O6 + 6O2, what is the mole ratio of CO2 to H2O?

Back

The mole ratio of CO2 to H2O is 1:1.

Front

What is the mole ratio of N2 to NH3 in the reaction N2 + 3H2 → 2NH3?

Back

The mole ratio of N2 to NH3 is 1:2.

Front

If 8 moles of Na are consumed in the reaction 2Na + S → Na2S, how many moles of Na2S are produced?

Back

4 moles of Na2S are produced.

Front

What is the total number of moles of water needed to produce 2.5 moles of glucose (C6H12O6) in the reaction 6CO2 + 6H2O → C6H12O6 + 6O2?

Back

15 moles of water are needed.

Front

In the equation ___N2 + ___F2 → ___NF3, what is the coefficient in front of N2?

Back

The coefficient in front of N2 is 1.

Front

What can be determined from a balanced chemical equation?

Back

The mole ratio of any two substances in the reaction.

Front

What is the mole ratio of H2 to O2 in the reaction 2H2 + O2 → 2H2O?

Back

The mole ratio of H2 to O2 is 2:1.