Question

Which of the following is correct with respect to the mass ratio of the combining elements in the compound - $C_2{H}_{5}OH$?

• A. Ratio of C:H:O is 8:3:12
• B. Ratio of C:H:O is 2:6:1
• C. Ratio of C:H:O is 6:2:1
• D. Ratio of C:H:O is 12:3:8

Answer 1

The correct option is D Ratio of C:H:O is 12:3:8

Atomic mass of carbon, hydrogen and oxygen is 12 g, 1 g and 16 g respectively.

So, the ratio by mass of the combining element is C:H:O
= (2$\times$12):(6$\times$1):(1$\times$16)
= 24:6:16
= 12:3:8