Question

A 250 mL sample of oxygen is collected over water at 25 degrees Celcius and 760.0 torr pressure. What is the pressure of the dry gas alone?

Answer 1

You have to subtract the water vapor pressure at 25C from 760Torr.
http://intro.chem.okstate.edu/1515sp01/database/vpwater.html

Answer 2

STOOOOOPID

Answer 3

It’s 736 torr