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The volume of a gas at pressure 21xx10^(...

The volume of a gas at pressure `21xx10^(4)N//m^(2) and` temperature `27^(@)C` is 83L. If R=8.3 J/mol/K, then the quantity of gas in g-mol will be

A

15

B

7

C

42

D

14

Text Solution

Verified by Experts

The correct Answer is:
B
`PV=nRT`
`n=(PV)/(RT)=(21xx10^(4)xx84xx10^(-3))/(8.3xx300)`
`=(21xx8.30xx100)/(8.3xx300)=7`.
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