What is the molar mass for the following compound , rounded to the nearest gram ? Na2S2O3

mass of Na = 23 u mass of S = 32 u mass of oxygen = 16 u Thus, Na2S2O3 = 23(2) + 32(2) + 16(3) = 46 + 64 + 48 = 110 + 48 = 158 u.