Zinc(II) sulfide reacts with oxygen according to the reaction:
2 ZnS(s) + 3 O2 (g) ? 2 ZnO(s) + 2 SO2 (g)
A reaction mixture initially contains 4.2 mol ZnS.
a. How many moles of oxygen will be required to react with ZnS?
b. Assuming there is enough oxygen,
i. How many moles of SO2 gas will be expected to be produced in the reaction?
ii. How many grams of ZnO will be produced