Question

The mass of a compound is $2.4$ g and the mass of $C{O}_2$ formed is $7.3$ g. Estimate the percentage of oxygen.

• A. $23.5$%
• B. $82.7$%
• C. $42.5$%
• D. None of these

Answer 1

The correct option is B $82.7$%

$\%$ of Oxygen $=\frac{16}{44}\times \frac{MassofC{O}_{2}formed}{Massoforganiccompound}\times 100$

$⟹\%$ of Oxygen $=\frac{16}{44}\times \frac{7.3}{2.4}\times 100$

$⟹\%$ of Oxygen $=82.7\%$ (approx.)