Question

The molecular formula of a compound is $C_2$$X_6$. X is unknown . If the mass ratio of C to X is 4:1. Find X.

• A. Helium
• B. Sodium
• C. Calcium
• D. Hydrogen

Answer 1

The correct option is D

Hydrogen

Let the mass of the element X be ‘y’. so the mass ratio of carbon to X = $\frac{(2\times 12)}{(6\times y)}=\frac{4}{1}$

So y = 1

This means the mass of element X=1

So X is hydrogen