All of the following are balanced equations. State the
number of atoms of each element in the reactants and in
the products.
a. 2Na(s) + Cl2(8) =2NaCl(s)
b. PC13(1) + 3H2(8) =PH3(8) + 3HC1()
c. P4010(s) + 6H2O(l) =4H3PO4(aq)