Three 1.00-L flasks at 25°C and 725 torr contain the gases CH 4 (flask A),CO 2 (flask B),and C 2 H 6 (flask C).
-In which flask is there 0.039 mol of gas?
A)Flask A
B)Flask B
C)Flask C
D)all
E)none

Question

Quizplus · Accepted Answer

Using the ideal gas law, PV = nRT, we can calculate the number of moles in each flask. Given that all flasks have the same volume, temperature, and pressure, they all contain the same number of moles, which is 0.039 mol.

Three 100-L Flasks at 25°C and 725 Torr Contain the Gases