Answer to Question #278163 in General Chemistry for asriel

Question

find the mass percentage of methane (CH4)

Answer 1

The mass percentage composition of methane CH₄

Molar mass of Methane $=16.043$

Molar mass of Hydrogen $=1.008$

Molar mass of Carbon $=12.011$

Mass of Hydrogen in 1 mole of Methane $=1.008×4$

$=4.032$

Percentage by mass of Hydrogen;

$=\frac{4.032}{16.043}×100\%=25.13\%$

Percentage by mass of Carbon $=\frac{12.011}{16.043}×100\%=74.87\%$