Question

How many liters of `C_3H_8` are in `1.505 xx 10^23` molecules of `C_3H_8`?

Answer 1

5.6 liters

Explanation:

There are `6.02 * 1 0^23` molecules in a mole, therefore `1.505*10^23` molecules constitute 0.25 moles.
One mole of ideal gas at STP occupies 22.41 liters, therefore 0.25 moles of propane gas has a volume of 5.6 liters