Arkansas State University
Department of Chemistry
and Physics
Worksheet 3
Moles

1. How many moles of NaHCO3 are in 27.5 g NaHCO3?

2. How many grams of H2O2 are in 2.0 mol H2O2?

3. Given the following equation, complete the questions below.

 2 H2    +    O2   g    2 H2O

a)  If you start with 5.0 mol H2, how many mol of H2O is produced?

b)  If you start with 10.0 g H2, how many mol of H2O is produced?

c)  If you start with 100.0 g H2, how many grams of H2O is produced?

4. Given the following equation, complete the questions below.

 8 Al   +  3 Fe3O4   g    4 Al2O3   +  9 Fe

a) determine the number of moles of Fe produced from 2.0 moles of Al.

b) determine the number of mol of Fe produced from 1.0 moles of Fe3O4.

c) determine the number of moles of  Al2O3 produced from 27.0 grams of Al.

d) determine the number of moles of Fe produced from 60.0 grams of Fe3O4.

e) determine the number of grams of Al needed to produce 100.0 grams of  Al2O3.
 

answers