Answer to Question #291420 in General Chemistry for geo

Question

What is the percent composition of the element hydrogen in the compound methane, CH4?

Answer 1

The molar mass of CH₄ $M=12.011+4\times1.008=16.043\frac{g}{mol}$

$\%H=\frac{4\times{A_r(H)}}{M\ (CH_4)}\times100\%=\frac{4\times1.008\ g/mol}{16.043\ g/mol}\times100\%=25.13\%$

Answer: 25.13%