IS THIS CORRECT:

Question

22.5*1MOL O2/6.022*10^23 = .0037

.0037*2=.0074

No, it isn't.
Look at the equation.
2H2 + O2 ==> 2H2O.

1 mol O2 produces 2 mols H2O.
2 mols O2 produces what(4)mols H2O.
3 mols O2 produces what(6) mols H2O.
22.5 mol O2 produces ???mols H2O.