An organic compound weighing 500 mg produced 220 mg of \({\mathrm{CO}}_{2}\) on complete combustion. The percentage comp…
An organic compound weighing 500 mg produced 220 mg of \({\mathrm{CO}}_{2}\) on complete combustion. The percentage composition of carbon in the compound is _____%. (nearest integer)
(Given molar mass in g mol–1 of C : 12, O : 16)
[JEE Main 2025, 7 Apr (Shift 1)]
12
\(\text{Organic compound }\overset{\mathrm{C}\mathrm{u}\mathrm{O}}{\underset{\Delta }{\to }}{\mathrm{C}\mathrm{O}}_{2}+{\mathrm{H}}_{2}\mathrm{O}\)
\({\mathrm{n}}_{{\mathrm{CO}}_{2}}=\frac{220\times {10}^{−3}}{44}=5\times {10}^{−3}\text{ }moles\)
\({\mathrm{m}}_{\mathrm{C}}=5\times {10}^{−3}\times 12\)
\(\mathrm{%}\text{ }carbon=\frac{5\times {10}^{−3}\times 12}{500\times {10}^{−3}}\times 100=12\mathrm{%}\)
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