Percent Composition

Determine the percent composition of each of the following compounds.

1.  KMnO4          K =                               Mn =                             O =

 

2.  HCl               H =                               Cl =

 

3.  Mg(NO3)2        Mg =                             N =                               O =

 

4.  (NH4)3PO4      N =                               H =                               P =                               O =

 

5.  Al2(SO4)3       Al =                              S =                               O =

 

Solve the following problems.

6.  How many grams of oxygen can be produced from the decomposition of 100. g of KClO3?

7.  How much iron can be recovered from 25.0 g of Fe2O3?

8.  How much silver can be recovered from 125 g of Ag2S?

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