0 . 5   g of an organic compound (X) with 60 % carbon will produce × 10 - 1   g of CO 2 on complete combustion.

Step-by-step solution

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 s + O 2 g → CO 2 g C % = 12 44 ×  Wt. of  CO 2  Wt. of organic compound  × 100 60 = 12 44 ×  Wt. of  CO 2 0 . 5 × 100 Wt. of CO 2 = 1 . 1