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ICSE Class 10 Chemistry 2014 Paper

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A cylinder contains 68 g68\ g of ammonia gas at s.t.p.
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Question : 72 of 88
Marks: +1, -0
What is the volume occupied by this gas?
Solution:  
NH3=14+3=17\mathrm{NH}_3=14+3=17
If 17 gm17\,\text{gm} of NH3\mathrm{NH}_3 contains 22.4 l22.4\,\text{l} at STP
Then 68 gm68\,\text{gm} of NH3\mathrm{NH}_3 contains
=22.417×68=89.6 l  .   = \frac{22.4}{17} \times 68 = 89.6\,\text{l} \; \text{. } \;
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