Find the percentage composition of carbon in H5C2O

53.33%

Explanation:

First, let us calculate the molar mass of H5C2O. This is illustrated below:

MM of H5C2O = (5x1) + (2x12) + 16

= 5 + 24 + 16 = 45g/mol

There are 2 atoms of carbon in H5C2O.

Therefore, the percentage composition of carbon in H5C2O is given by:

(24/45) x 100 = 53.33%