Question

how to balance this
 
 na+o₂ =na₂ o

Answer 1

Na+O2--->Na2O
in the reactors side-
Na=1
O=2
in the products side-
Na=2
O=1
To balance the chemical reaction;
in reactors side-
Na=1*4=4
O=2
in products side-
Na=2*2=4
O=1*2=2
Hence the balanced chemical reaction is-
4Na+O2----->2Na2O


Hope i helped u:)

Answer 2

that's too easy

4Na + O2 = 2NA2O