This question is understoichiometry which is the quantitative relationship of reactants and products., We will use the formula for ideal gas law which is PV=nRT, P = pressure, T = temperature, V = volume, n = # of moles, R = ideal gas constant, PV = nRT, in order to find the volume divide Pon both sides of the equation, we get:, V = nRT / P (substitute the values given), V = (0.20) (8.314)(300) / 100, *Make sure units are in kPA, mol, K if you want to use the 8.314,