(1) Calculate the vol in L of 1 mol of He(g) at 298 K & 1 bar of pres. (2) The radius of He atom is 1.2 . Using atomic radius (assume He atom is spherical) calculate vol in L that 1 mol of He atoms have (calc volume of atoms) (3) Using numbers from part (1) and (2) calculate the fraction of the total vol that is occupied by He atoms. (4) He(aq) has a density=0.1248 g mL1. Calc the vol of 1 mol of liquid He. Approx what fraction of the vol of the liquid is occupied by the atoms?