0 . 5g of an organic compound (X) with 60 % carbon will produce ×...

To calculate the mass percent of an element in a compound, we divide the mass of the element in 1 mole of the compound by the compound's molar mass and multiply the result by 100.

The combustion reaction is $C\left(s\right) + {O}_{2}\left(g\right)\overset{}{\to}{CO}_{2}\left(g\right)$

$C$

$60 = \dfrac{12}{44} \times \dfrac{\text{Wt. of}{CO}_{2}}{0 . 5} \times 100$

Wt. of ${CO}_{2} = 1 . 1$