the volume of a gas is 50.0L at 742mm Hg. what volume will it occupy at standard temperature and pressure?

Answer 1

pV=nRT. You know pV and you also know nRT. You can rearrange this to give p and then substitute in standard temperature and pressure. I don't know what standard pressure is in mmHg, but standard temperature is normally 298K

Answer 2

Hello wenhao: What is the temperature of the gas ? I will assume that temperature is 50.0 C.

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( PSTP ) ( VSTP ) / (TSTP ) = ( P1 ) ( V1 ) / ( T1 )

VSTP = ( V1 ) ( PSTP / P1 ) ( TSTP / T1 )

VSTP = ( 50.0 L ) ( 742 mm Hg / 760 mm Hg ) ( 273.2 / 323.2 )

VSTP = 41.0 L <----------------------