Question

A hydrocarbon has 3 gram of carbon per gram of hydrogen hence it's simplest formula will be ??

Answer 1

C:H

3:1

3/12:1/1

1/4:1

1:4

Hence the simplest formula is CH4.

Answer 2

Given:

Carbon content = 3 grams per gram hydrogen

To Find:

The simplest formula of the hydrocarbon.

Calculation:

- The no of moles of Carbon in 3 grams = 3/12 = 0.25 moles

- The number of moles of hydrogen in 1 gm = 1/1 = 1 mole

- Divide both by the smallest number of the two:

C = 0.25/0.25 = 1

H = 1/0.25 = 4

- So, the ratio of Carbon to Hydrogen = 1 : 4

- Hence, the simplest formula of the hydrocarbon will be CH4.