Question

On complete combustion, 0.246 g of an organic compound gave 0.198 g of carbon dioxide and 0.101 g of water. Determine the percentage composition of carbon and hydrogen in the compound:

Options

• 8.9% (H) 4.58% (C)

• 6.8% (C) 4.58% (H)

• 4.58% (H) 21.95% (C)

• 3.2% (H) 21.95% (C)

Answer 1

4.58% (H) 21.95% (C)

Explanation:

% of carbon = `(12 xx 0.198 xx 100)/(44 xx 0.246)` = 21.95%

% of hydrogen = `(2 xx 0.1014 xx 100)/(18 xx 0.246)` = 4.58%