Question

Question #acdf3

Answer 1

The balanced equation is:

`4NH_(3(g))+7O_(2(g))rarr4NO_(2(g))+6H_2O_((g))`

Addendum:

Yes, oxygen must have a subscript of two beacause it forms diatomic molecules. There are seven elements (all gases) that do so:

Oxygen - `O_2`, Hydrogen - `H_2`, Nitrogen - `N_2`, Fluorine - `F_2`, Iodine - `I_2`, Chlorine - `Cl_2`, and Bromine - `Br_2`

These elements will always have a subscript of 2 when alone in a reaction.