Calculate the empirical formula of water, if a sample contains 0.6g of hydrogen and 4.8g of oxygen.

H₂O

Explanation:

Given parameters:

Mass of hydrogen  = 0.6g  

Mass of oxygen  = 4.8g

Unknown:

Empirical formula of the water  = ?

Solution:

The empirical formula is the simplest formula of a compound.

Elements                   Hydrogen                 Oxygen

Mass                               0.6                           4.8                 

Molar mass                      1                               16                      

Number of

moles                           0.6/1                         4.8/16                  

                                      0.6                             0.3                      

Divide by the

smallest                      0.6/0.3                        0.3/0.3              

                                          2                                  1    

The empirical formula is  H₂O

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