Based on the balanced equation

Question

4Na + O2 → 2Na2O

calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react?

Thanks.

Answer 1

You are limited to 20 O, and 30Na2, so the overall limit is 20 O in 2Na2O, so the total Na2O has to be 20 total max.

Answer 2

Formula compound