Step-by-step explanation:
STP stands for standard conditions of temperature and pressure. They are 1 atm and 273.15 K. One mol of any ideal gas will occupy 22.4 L. We can use that relationship to find the volume of 0.320 mol of a gas.
1 mol of gas = 22.4 L
Volume = 0.320 mol * 22.4 L/(1 mol)
Volume = 7.17 L
Answer: The volume of the gas is 7.17 L.