The molar volume of a gas at STP, in liters, is 22.4
you then multiply 22.4 by 2 to get the answer to the next question:
You can use the molar volume to convert 2 mol of any gas to 44.8 L
You can also use the molar volume to convert 11.2 L of any gas to 0.500 mol.
Avogadro’s law tells you that 1.2 L of O2(g) and 1.2 L of NO2(g) are the same numbers of moles of gas.
