The ratio of the mass percentages of 'C & H' and 'C & O' of a saturated acyclic organic compound 'X' are 4 : 1 and 3 : 4 respectively. Then, the moles of oxygen gas required for complete combustion of two moles of organic compound 'X' is _______ .

C : H = 4 : 1, C : O = 3 : 4, Mass ratio C : H : O = 12 : 3 : 16, Mole ratio C : H : O = 1 : 3 : 1

Empirical formula $=C{H}_{3}O$, Molecular formula $=C_2{H}_6{O}_2$

(saturated acyclic organic compound)

$C_2{H}_6{O}_2+\frac{5}{2}{O}_2\to 2C{O}_2+3H_{2}O$

2 mole                 5 mol
Moles of $O_2$ required = 5 moles