What are the coefficients that balance the following chemical equation. nh3 + o2 → no2 + h2o

4, 7, 4, 6

Explanation:

The law of conservation of mass states that in every chemical reaction, the mass of the reactant must be equal to the mass of the products: this means that the number of atoms of each element must be equal in the reactants and in the products.

If we choose the coefficients in this way:

4, 7, 4, 6

We see that the reaction becomes:

And we can verify that the number of atoms for each element in the reactants is equal to the product:

- Nitrogen (N): 4 atoms on the left, and 4 on the right

- Oxygen (O): 7 x 2 = 14 atoms on the left, 4 x 2 + 6 = 14 atoms on the right

- Hydrogen (H): 4 x 3 = 12 atoms on the left, 6 x 2 = 12 atoms on the right