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Calculate the mass percentage of aspirin ($C_9H_8O_4$) in acetonitrile ($CH_3CN$) when 6.5 g of $C_9H_8O_4$ is dissolved in 450 g of $CH_3CN$.

$\begin{array}{1 1}1.424\%\\1.324\%\\1.224\%\\1.624\%\end{array} $

1 Answer

Mass percentage of aspirin =$\large\frac{\text{Mass of aspirin}\times 100}{\text{Mass of aspirin + Mass of acetonitrile}}$
$\Rightarrow \large\frac{6.5}{6.5+450}$$\times 100$
$\Rightarrow 1.424\%$
answered Aug 5, 2014 by sreemathi.v
 
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