AP Chemistry Multiple Choice Practice Test

Question 1 of 3
63% Get this Question Right
What volume of oxygen (O2) at 22 degrees Celsius and 1.00 atm contains the same number of molecules as 0.400 L H2 at 45 degrees Celsius and 1.00 atm?
0.371 L
0.431 L
0.400 L
0.251 L
0.298 L