That's right!

This is just a direct application of the Ideal Gas Law.

P V = n R T

n = P V / R T

Remember, the temperature T is always the absolute temperature, measured in kelvins.

T = 25^oC = (25 + 273) K= 298 K

n = (1.0 atm) (1.3 L) / [ (0.082 L-atm / mol-K) (298 K)]

n = 0.053 moles

(c) 2002, Doug Davis; all rights reserved.