Write the empirical formulas of the following compounds: (a) al2br6, (b) na2s2o4, (c) n2o5, (d) k2cr2o7, (e)h2c2o4.

1.

2.

3.

4.

5.

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.

1. has empirical formula of

2. has empirical formula of

3. has empirical formula of  

4. has empirical formula of

5. has empirical formula of  

1.solid

2.carbon dioxide

3.helium