Question

A sample of gas has a volume of 425 mL at 25°C and 760 torr. What volume would this gas sample have at STP?

Answer 1

Standard Temperature and Pressure

From the gas sample STP: P=760 torr and T=273K.

And the normal temperature is 25°C

Therefore the number of moles and pressure is constant. So according to the  Charles' law. The volume and temperature which is directly proportional for the same at constant pressure

V1/V2=T1/T2

V2  =  T2×V1/T1

V2 = 273K×425ml/298K ( Where K gets Cancel)

The volume of gas sample have =398 ml