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ICSE Class 10 Chemistry 2018 Paper

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Question : 55 of 80
Marks: +1, -0
The percentage composition of a gas is : Nitrogen 82.35%82.35\% , Hydrogen 17.64%17.64\% Find the empirical formula of the gas.
[N=14,H=1][\mathrm{N}=14,\mathrm{H}=1]
Solution:  
NH82.3517.6482.351417.641=5.88=17.64.885.8817.645.88=1=3\begin{array}{c c c} \mathrm{N} & & \mathrm{H} \\ 82.35 & & 17.64 \\ \frac{82.35}{14} & & \frac{17.64}{1} \\ =5.88 & & =17.64 \\ \frac{.88}{5.88} & & \frac{17.64}{5.88} \\ =1 & & =3 \end{array}
Empirical formula =NH3=\mathrm{NH}_3
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