Introduction to Stoichiometry

Acid rain can be destructive to both the natural environment and human-made structures. The equation below shows a reaction that occurs that may lead to the formation of acid rain. 3NO2 + H2O -> 2HNO3 + NO How many moles (precise to the nearest 0.01 mol) of nitric acid are produced from 300.00 mol of nitrogen dioxide?

200.00 mol

Consider the reaction below. 2H2 + O2 -> 2H2O How many moles of water are produced from 13.35 mol of oxygen?

26.70

The following balanced equation shows the formation of ethane (C2H6). C2H2 + 2H2 -> C2H6 How many moles of hydrogen are needed to produce 13.78 mol of ethane?

27.56 mol

Review the equation below. 2KClO3 -> 2KCl + 3O2 How many moles of oxygen are produced when 2 mol of potassium chlorate (KClO3) decompose?

3

Consider the balanced equation below. 4NH3 + 3O2 -> 2N2 + 6H2O What is the mole ratio of NH3 to N2?

4:2

Consider the balanced equation below. 8H2 + S8 -> 8H2S Based on the mole ratios, what can most likely be predicted?

8 mol of hydrogen will react with 1 mol of sulfur

The balanced chemical equation for the reaction of hydrogen and oxygen is shown below. 2H2 + O2 -> 2H2O The number of moles of hydrogen that is needed to produce 0.253 mol of water is

equal to 0.253 mol.

The balanced chemical equation for the reaction of copper (Cu) and silver nitrate (AgNO3) is shown below. Cu + 2AgNO3 -> 2Ag + Cu(NO3)2 How many moles of copper must react to form 3.50 mol of Ag?

1.75

Consider the reaction below. 2H2O -> 2H2 + O2 How many moles of hydrogen are produced when 6.28 mol of oxygen form?

12.6 mol

The following balanced equation shows the formation of water. 2H2 + O2 -> 2H2O How many moles of oxygen (O2) are required to completely react with 27.4 mol of H2?

13.7 mol

The reaction below shows how silver chloride can be synthesized. AgNO3 + NaCl -> NaNO3 + AgCl How many moles of silver chloride are produced from 15.0 mol of silver nitrate?

15.0 mol

The balanced equation below shows the products that are formed when butane (C4H10) is combusted. 2C4H10 + 13O2 -> 8CO2 + 10H2O What is the mole ratio of butane to carbon dioxide?

1:4

Consider the reaction below. 2Al2O3 -> 4Al + 3O2 How many moles of oxygen are produced when 26.5 mol of aluminum oxide are decomposed?

39.8 mol

Consider the equation below. N2 + 3H2 -> 2NH3 What is the mole ratio of hydrogen to ammonia?

3:2