a. Calculate the total masses of the reactants in equation 2Ga(s)+3Cl2(g)→2GaCl3(s) Express your answer using four significant figures. b. Calculate the total masses of the products in equation above. Express your answer using four significant figures. c. Calculate the total masses of the reactants in equation 4NH3(g)+5O2(g)→4NO(g)+6H2O(g) Express your answer using four significant figures. d. Calculate the total masses of the products in equation above. Express your answer using four significant figures.