Question

When oxygen expands from the liquid to gaseous state how much more volume does it occupy?

Answer 1

I'm not sure exactly how the answer is to be expressed but we can make some good suggestions. Suppose we have exactly 1.00 mL oxygen liquid. The density of liquid oxygen at the boiling point (90.2 K) is 1.14 g/mL. If it vaporizes at this temperature it will become a gas and will occupy a volume determined by PV = nRT.
P = 1 atm
V = you calculate--remember the answer will be in liters, you can convert to mL by multiplying by 1000.
n = 1.14*1/32 = 0.0356 moles
R = 0.08206
T = 90.2
Post your work if you get stuck.

Answer 2

You can recalculate the volume at room temperature (25 C or 298 K) which will show an even larger increase.