A mixture of $\mathrm{NH}_{4} \mathrm{NO}_{3}$ and $\left(\mathrm{NH}_{4}ight)_{2} \mathrm{HPO}_{4}$ contain…
A mixture of $\mathrm{NH}_{4} \mathrm{NO}_{3}$ and $\left(\mathrm{NH}_{4}ight)_{2} \mathrm{HPO}_{4}$ contain $30.40 \%$ mass per cent of nitrogen. What is the mass ratio of the two components in the mixture?
$2: 1$
$1: 2$
$3: 4$
$4: 1$
Solution
Let wt. of $\mathrm{NH}_{4} \mathrm{NO}_{3}$ and $\left(\mathrm{NH}_{4}ight)_{2} \mathrm{HPO}_{4}$ are $\mathrm{x}$ and y gram respectively $\frac{\frac{x}{80} \times 2 \times 14+\frac{y}{132} \times 2 \times 14}{x+y} \times 100=30.4$
$\Rightarrow x: y=2: 1$
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