2zN reacts with O2 to produce 2ZnO, HOW MANY GRAMS OF ZINC OXIDE CAN BE PRODUCED FROM 2.75 G OF OXYGEN?

Answer 1

2Zn + O2 ==> 2ZnO
mols O2 = grams/molar mass = ?
Using the coefficients in the balanced equation convert mols O2 to mols ZnO. That will be just mols ZnO = mols O2 x 2.
Then convert mols ZnO to grams ZnO with grams = mols x molar mass.

Answer 2

6.92