Calculate the mass percentage of aspirin $\left(\mathrm{C}_9 \mathrm{H}_8 \mathrm{O}_4\right)$ in acetonitrile $\left(\mathrm{CH}_3 \mathrm{CN}\right)$ when $6 \cdot 5 \mathrm{~g}$ of $\mathrm{C}_9 \mathrm{H}_8 \mathrm{O}_4$ is dissolved in $450 \mathrm{~g}$ of $\mathrm{CH}_3 \mathrm{CN}$.

Question

Calculate the mass percentage of aspirin $\left(\mathrm{C}_9 \mathrm{H}_8 \mathrm{O}_4\right)$ in acetonitrile $\left(\mathrm{CH}_3 \mathrm{CN}\right)$ when $6 \cdot 5 \mathrm{~g}$ of $\mathrm{C}_9 \mathrm{H}_8 \mathrm{O}_4$ is dissolved in $450 \mathrm{~g}$ of $\mathrm{CH}_3 \mathrm{CN}$.,

MARKS App · Accepted Answer

Mass percentage of aspirin $=\frac{\text { Mass of aspirin }}{\text { Mass of aspirin }+\text { Mass of acetonitrile }} \times 100$ $=\frac{6.5}{6.5+450} \times 100=1.424 \%$

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