NEED HELP ASAP.....Titanium dioxide is used as a white pigment in paints. If 3.5 mol TiCl4 reacts with 4.5 mol O2, which is the limiting reactant?

TiCl4 + O2 --> TiO2 + 2Cl2



A)O2 is limiting

B)TiCl4 is limiting

C)TiO2 is limiting

D)Cl2 is limitin