Question

How to find x where x is unknown, the molecular form is $C_2\times X_6$ and mass ratio is 4:1.

Answer 1

Given,
2 atoms of Carbon combine with 4 atoms of X.
Mass of 1 carbon atom = 12,
Or, Mass of carbon in compound = $12\times 2=24$
We know that, mass ratio of C to X is 4:1
For, 4 units of carbon, units of X = 1
Or, for 1 unit of C, unit of $X=\frac{1}{4}$
Or, for 24 units of C, unit of $X=\frac{1}{4}\times 24=6$
Now, we know that 6 atoms of X weigh 6 units.
Hence, X refers to H (since weight of H = 1)
The compound = $C_2{H}_6$