In each molecule of carbon tetrachloride, the mass percent of carbon and chlorine respectively are
In each molecule of carbon tetrachloride, the mass percent of carbon and chlorine respectively are
76.86 and 23.14
7.84 and 92.80
23.14 and 76.86
78.41 and 9.25
Solution
Mass percentage of a component
$
=\frac{\text { Mass of a component }}{\text { Total mass }} \times 100
$
In a molecular of $\mathrm{CCl}_4$ (carbon tetrachloride),
$
=1 \mathrm{C}+4 \mathrm{Cl} \text { atoms are present. }
$
Atomic mass of $\mathrm{C}=12.01, \mathrm{Cl}=35.5$
Molecular mass of $\mathrm{CCl}_4=154$
Mass $\%$ of $\mathrm{C}=\frac{12.01}{154} \times 100=7.79$
Mass $\%$ of $\mathrm{Cl}=\frac{4(35.5)}{154} \times 100$
$
=\frac{142}{154} \times 100=92.7
$
So, mass \% of $\mathrm{C}$ and $\mathrm{Cl}$ is approximately equal to 7.84 and 92.80 respectively