Chemistry
Grade-9
Easy
Question
The mass of 112cm3 of NH3 gas at STP is:
- 0.085 gm
- 850 gm
- 85.05 gm
- 0.850 gm
Hint:
22.4 dm3 is occupied by 17g NH3
The correct answer is: 0.085 gm
1 mole of any gas occupies 22.4L at STP.
22.4 dm3 is occupied by 17g NH3
112*10-3 dm3 occupies (17*112*10-3)/22.4 = 0.085g
The mass of 112cm3 of NH3 gas at STP is 0.085g
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