Which of the following equations are correctly balanced?
I. 2 Li + O2 Li2O
II. MgCl2 Mg + Cl2
III. Ag + 2 HCl AgCl + H2
IV. 2 C3H6 + 9 O2 6 CO2 + 6 H2O
I. 2 Li + O2 Li2O
II. MgCl2 Mg + Cl2
III. Ag + 2 HCl AgCl + H2
IV. 2 C3H6 + 9 O2 6 CO2 + 6 H2O
