If 16 g of AX2 is reacted with excess X2 to give 18 g of AX3, what is the percent yield of AX3? 2 AX2 (g) + X2 (g) → 2 AX3 (g) Note that the molar mass of AX2 is 64.07 g/mol Note that the molar mass of AX3 is 80.06 g/mol Note that AX2, X2, and AX3 are hypothetical compounds.