Question

The molecular formula for butane is C4H10. Determine the percent composition for

each element in the compound.

Answer 1

%Mass

Ar C = 12 g/mol, Mr C₄H₁₀ = 58 g/mol, Ar H = 1 g/mol

`\tt C=(4.12)/(58)* 100\%=82.8\%\\\\H=100\%-82.8\%=17.2\%`

or

`\tt H=(10.1)/(58)* 100\%= 17.2\%`