Question

at constant temperature a gas at a pressure of 750mm of mercury occupies a volume of 100 cm3 if volume is decreased by 40 percent find the new pressure​

Answer 1

Answer:

1250 mm of Hg

Explanation:

as volume is decreased by 40% so new volume must be 100-40%of100.

Answer 2

Answer:1250 mm of hg

Explanation:PV=nRT

P1V1/P2V2=constant

P1V1=P2V2

P2=P1V1/V2

P1=750 mm of hg

V1= 100 cm³

If volume is decreased by 40%, then it will be 60

ie., 100*60/100= 60 cm³(V2)

Therefore P2=750*100/60 =1250 mm of hg