A sample of gas is at STP. if the temperature remains the same, at what pressure

Question

A sample of gas is at STP. if the temperature remains the same, at what pressure in too will the volume double?

l) A sample of gas is at STP. If the temperature remains the same, at what pressure in torr does will the volume double? [3 points] the result of beta-decay of radioactive materials in the earth's ometers is that barometers measure while manometers measure (2 points] of radioactive material has a half-life of 5.0 months. After a perod of 20 months, what ntags ef the griginal radioactive material is left? (2 points)

Explanation / Answer

PV = nRT

at constant T and when no gas added or removed , we have PV = constant

P1V1 = P2V2

P1 = initial pressure , P2 = final pressure , V2/V1 = 2 ( final volume is 2 times of initial volume)

P2/P1 = ( V1/V2)

P2/P1 = ( 1/2)

P2 = ( 1/2) (P1)

Thus when final pressure if half of initial volume we get volume doubled

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