A 54.0 mL sample of oxygen is collected over water at 23°C and 770.0 torr pressure. What is the volume of the gas at STP?

volume-of-gas
oxygen-collected

#1

A 54.0 mL sample of oxygen is collected over water at 23°C and 770.0 torr pressure. What is the volume of the gas at STP?

Answer:

use PV= nRT to solve for the number of moles which is 0.9589 and then plug that back into PV = nRT with with STP and solve for V. This solution is 21.49 mL