Answer to Question #253969 in General Chemistry for Thel

Question

A sample of gas at 25.0 °C has a volume of 11.0 L and exerts a pressure of 660.0mmHg. How many moles of gas are in the sample?

Answer 1

PV = nRT:

(660.0 mmHg / 760.0 mmHg/1.00 atm) (11.0 L) = (n) (0.08206 L atm / mol K) (298 K)

conversion from mmHg to atm and from Celsius to Kelvin.

How many moles of gas are in the sample?

n = 0.391 mol