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A cylinder contains oxygen at pressure o...

A cylinder contains oxygen at pressure of 28 atm and at a temperature of 300 K. the mass of oxygen the gas, the pressure is found to be 7 atm and the temperature is 200 K. what mass of the gas has been used?

A

100 gm

B

250 gm

C

625 gm

D

1000 gm

Text Solution

Verified by Experts

The correct Answer is:
C
`P_(2)V=m_(2)RT_(2) and P_(1)V=m_(1)RT_(1)`
`thereforem_(2)=(P_(2))/(P_(1))xx(T_(1))/(T_(2))xxm_(1)" "m_(2)=375m=m_(1)-m_(2)`
`=1000-375=625g`
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