Learning Module 34: Reaction Stoichiometry Basics

What is the number of nitrogen molecules that reacted with excess hydrogen to make 2 x 1010 molecules of ammonia? 3 H2 + N2 ⟷ 2 NH3

1 x 10^10

Balance the following chemical equation and give the coefficients: __ C2H4 + __ O2 → __ CO2 + __ H2O

1, 3, 2, 2

What is the number of ammonia molecules made when 6 grams of hydrogen gas reacts with excess nitrogen? 3 H2 + N2 ⟷ 2 NH3

12 x 102^3

Consider the reaction: CH4 + 2 O2 → CO2 + 2 H2O Exactly 14.5 moles of CO2 are produced from burning how many moles of CH4 in excess oxygen?

14.5 moles

The balanced reaction for the Haber process that produces ammonia to feed the world will be used in the next four reaction stoichiometry problems. 3 H2 + N2 ⟷ 2 NH3 How many grams of ammonia are produced when 28 grams of nitrogen gas are reacted with excess hydrogen gas?

34 grams

What is the law that ensures that chemical reactions are balanced?

The law of conservation of matter

Consider the combustion of propane: C 3 H 8 + 5 O 2 ⟶ 3 C O 2 + 4 H 2 O Which of the following unit factors below is correct? (Select all that may apply)

There are 10 oxygen atoms reacting for every four water molecules produced. There are 10 oxygen atoms reacting for every six oxygen atoms produced in CO2. There are 5 oxygen molecules reacting for every six oxygen atoms produced in CO2.

The difference between doing compositional stoichiometry and reaction stoichiometry problems is

the use of stoichiometric mole ratios