The volume of 02 collected over water at 25 degree C and 740 torr, was 250 mL. What volume will the dry 02 occupy at STP? (Vapor pressure of water at 25 degre C is 23.8 torr).

Answer 1

Use (P1V1/T1) = (P2V2/T2)
For P1 use 740 torr-23.8 = ??
Standard conditions for P2and T2.
Don't forget T is in Kelvin.