How many oxygen molecules fill a #50*dm^3# tank under normal conditions?

1 Answer
Mar 18, 2016

Answer:

There are approx. #2# #mol# #O_2# molecules at #298K# in a #50# #dm^3# volume

Explanation:

We assume a temperature of #298K#, and a pressure of #1# #atm#. If we don't make these assumptions, we cannot answer the question.

The molar volume of an ideal gas under these conditions is #24.5# #dm^3#.

So #(50.0*dm^3)/(24.5*dm^3*mol^-1)# #~=# #2*mol# #O_2# gas.