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A compound possesses 8% sulphur by mass.The least molecular mass is

$\begin{array}{1 1}(a)\;200&(b)\;400\\(c)\;155& (d)\;355\end{array} $

nice answer. thanks
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1 Answer

The compound has sulphur=8%
$\therefore$ 8g of S is present in 100g
$\therefore$ 32g of S is present in $\large\frac{100}{8}$$\times 32=400g$
[Least molecular mass means that at least one atom of sulphur should be present in molecule]
Hence (b) is the correct answer.
answered Mar 25, 2014 by sreemathi.v
 

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