Question

What volume would 3.01•1023 molecules of oxygen gas occupy at STP?

Answer 1

You can solve this question by combining the following two equations:

PV=nRT
n=n(molecules)/N(A)

Where P is the pressure, V is the volume, n is the moles, R is the gas constant, T is the temperature, n(molecules) is the number of molecules, and N(A) is Avogadro's number. Plug in all the values (you should know what P and T are for STP) and solve for V to find your answer!

Answer 2

At STP, one mole of any gas occupies 22.4L. Therefore, find the moles of oxygen first, then multiply it by 22.4L