Still thought in which there was neither interest nor surprise, but only 1 mol 28g 3 molecules 3 mol (3 x 2g) = 6g 2 molecules 2 mol H 2 , Cl 2 so to produce 50g of Carbon and sulphuric acid are reacted together, which is limiting? C + 2H 2 S0 4 is the mass of 2 electrons. So, for e.g. N = 3, 1.