Question

Calculate the mass percentage of carbon in C2H4

Answer 1

Answer:

85.71 %

Explanation:

Molar mass of the Ethylene = 12 × 2 + 1 × 4

= 24 + 4

= 28 g/mole.

Mass of the Carbon Present in Ethylene = 12 × 2  

= 24

∴ % composition of the Carbon = 24/28 × 100

 = 85.71 %

Answer 2

Given:

The given compound is $C_2H_4$.

To find:

The mass percentage of C.

Solution:

The compound is $C_2H_4$.

The atomic mass of C is 12 grams and the atomic mass of hydrogen is 1 gram.

Hence the molecular mass of ethene is 2×12+1×4=28 grams.

The amount of C is 12×2=24 grans.

Hence mass percentage of carbon in ethene can be given as follows-

$\frac{24}{28} \times 100 \\ = 85.71\%$

Hence mass percentage of carbon in ethene is 85.71%.