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 chemical reaction, derived from the coefficients in a balanced equation.

Front

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

Back

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

Front

Given the reaction 4 FeS + 7 O2 → 2 Fe2O3 + 4 SO2, what is the mole ratio of Fe2O3 to O2?

Back

The mole ratio of Fe2O3 to O2 is 2:7.

Front

In the reaction 4Al + 3O2 → 2Al2O3, how many moles of Al2O3 are produced from 6 moles of O2?

Back

4 moles of Al2O3 are produced from 6 moles of O2.

Front

What is the mole ratio of CO2 to C6H12O6 in the reaction 6CO2 + 6H2O → C6H12O6 + 6O2?

Back

The mole ratio of CO2 to C6H12O6 is 6:1.

Front

In the reaction 2AgNO3 + BaCl2 → 2AgCl + Ba(NO3)2, how many moles of AgCl are produced from 6 moles of BaCl2?

Back

12 moles of AgCl are produced from 6 moles of BaCl2.

Front

What is a limiting reactant?

Back

A limiting reactant is the reactant that is completely consumed first in a chemical reaction, limiting the amount of product that can be formed.

Front

In the reaction 4NH3 + 6NO → 5N2 + 6H2O, if you have 16 moles of NH3 and 30 moles of NO, which is the limiting reactant?

Back

The limiting reactant is NH3.

Front

How do you calculate the number of moles of product formed from a given amount of reactant?

Back

Use the mole ratio from the balanced equation to convert moles of reactant to moles of product.

Front

What is the mole ratio of reactants to products in a balanced equation?

Back

The mole ratio of reactants to products is determined by the coefficients in the balanced equation, indicating how many moles of each are involved.