What is the average colume of space, in liters that contains one H atom?

The average density of the universe as a whole is estimated to be about 1.5*10^-29 g/cm^3. If we assume that the entire mass is only hydrogen atoms, what is the average volume of space, in liters that contains one H atom?|||1 H atom weight is 1/(6.02*10+23) or about 1.7x10-24 gram. Then 1.7*10-24 g/1.5*10-29 g/cm3 = 1.2 x 10+5 cm3 or abut 120 L.|||I think the volume of a mole of any gas at std Temp and Pressure is 22.4 liters. So then just divide 22.4 liters by 6.0 X 10e23. I don't think "outer space" is relevant here...