Compounds A and Breact according to the following equation: 3 A + B → C + D If you react 2 mol A with 1 mol B, which of the following is true? Select one: Neither reactant is limiting. A is the limiting reactant because of its higher molar mass. A is the limiting reactant because you need three moles of A and only have two. B is the limiting reactant because you have fewer moles of B than A B is the limiting reactant because three molecules of A react with one B molecule.