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Question

4.4gm of a gas at STP occupies a volume of 2.24 lit the gas can be:

A
O2
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B
CO
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C
NO2
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D
CO2
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Solution

The correct option is A CO2
At STP,
2.24litre is ocupied by 4.4gm of gas
Then, 22.4L is occupied by =22.4×4.42.24=44g
Molar mass of CO2
C=12,O=16
12+2(16)12+32=44gm
So, the gas will be 44g .

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