Fill in the table below for the molecules shown. HCI Ar (atom) Ethane, C2Ho # total modes # translational modes # rotational modes # vibrational modes Solution Argon : 3 (translational) + 0(rotational) + 0(vibrational) = 3(total) HCl : 3(translational) + 2(rotational) + 1(vibrational - high T) = 6(total - high T) C2H6 : 3(translational) + 3(rotational).