Suppose the Redox Reaction in a Certain Zinc-Carbon Battery Is $\rightarrow$

Suppose the redox reaction in a certain zinc-carbon battery is Zn +2 MnO₂ + 2 NH₄ Cl $\rightarrow$ MN₂ O₃ +Zn(NH₃ ) 2 CL₂ + H₂ O.The battery is rated at 4.5 W _• hr at 1.5 V.How many grams of zinc must be oxidized to deliver this much charge?

A) 11 g Zn
B) 1.8 g Zn
C) 3.7 g Zn
D) 8.2 g Zn
E) 5.5 g Zn