Intro to Stoichiometry - Mole Ratios

Stoichiometry refers to...?

• Determining if there are more reactants than products in a chemical reaction

• The measurement of elements on the periodic table

• The ratio of reactants to products expressed by a chemical equation

• both b and c

The ratio of reactants to products in a balanced chemical equation is most similar to a ...

• a recipe with the amounts of each ingredient needed

• a list of the ingredients needed in the recipe

• A recipe with the amounts of each ingredient and the product yield

• a list of the most important ingredients in the recipe

Write your answer as a ratio or a fraction e.g. 2/3

Based on the following chemical reaction, what is the ratio of ammonia (NH₃) to hydrogen?

N₂ + 3H₂ --> 2NH₃

Based on the following chemical reaction, what is the ratio of ammonia (NH₃) to nitrogen?

N₂ + 3H₂ --> 2NH₃

Based on the following chemical reaction, what is the ratio of hydrogen to nitrogen?

N₂ + 3H₂ --> 2NH₃

Based on the following chemical reaction, what is the ratio of oxygen to water produced?

2H₂ + O₂ --> 2H₂O

Based on the following chemical reaction, what is the ratio of hydrogen to water produced?

2H₂ + O₂ --> 2H₂O

2H₂ + O₂ --> 2H₂O

Based on the ratios in the chemical equation, if you have 4 mol of hydrogen, how many moles of water will be produced?

• 1

• 2

• 4

• 8

3H₂ + N₂ --> 2NH₃

Based on the ratios in the chemical equation, if you have 33 mol of hydrogen, how many moles of ammonia will be produced?

• 11

• 22

• 33

• 66

C₃H₈ + 5O₂ --> 4H₂O + 3CO₂

Based on the ratios in the chemical equation, how many moles of oxygen are required if 80 moles of water are produced?

• 20

• 60

• 80

• 100