Ibuprofen is a common pain reliever and anti-inflammatory. its formula is below. determine the percent composition of hydrogen by mass. *

%

Explanation:

Please see the complete question in the attachment

The given formula of Ibuprofen consists of 13 atoms of carbon, 18 atoms of hydrogen and 2 atoms of oxygen.  

The atomic mass of carbon, hydrogen and oxygen is 12, 1 and 16 respectively.  

The total atomic mass of  Ibuprofen is equal to  

Percent composition of hydrogen by mass is equal to atomic mass of hydrogen divided by total mass of Ibuprofen.

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