For each of the following reactions, give the balanced equation for the reaction and state the meaning of the equation in terms of the numbers of individual molecules and in terms of moles of molecules.

a. MnO2(s) + Al(s)-Mn(s) + Al2O3(s)
b. B203(s) + CaF2(s)-BF3(g) + CaO(s)
c. NO2(g) + H2O)> HNO;(aq) + NO(g)
d. C6H6(g) + H2(g)â C6H12(g) 12)