Question

What are the coefficients that balance the following chemical equation. ___ NH3 + ___ O2 → ___ NO2 + ___ H2O

Answer 1

Answer:
`4NH_3+7O_2\Rightarrow 4NO_2+6H_2O`

Step-by-step explanation:

Using Law of conservation of mass, The total mass of the reactants must be equal to total mass of the products in a chemical reaction.

On the reactant side, there are 1 atom of Nitrogen, 3 atoms of Hydrogen and 2 atoms of Oxygen. On the product side there are 1 atom of nitrogen, 3 atoms of oxygen and and 2 atoms of hydrogen.

In order to balance both the sides we would multiply and balance. The balanced chemical equation is:

`4NH_3+7O_2\Rightarrow 4NO_2+6H_2O`

Now, on both reactant and product side, there are 4 Nitrogen atoms, 12 Hydrogen atoms and 14 Oxygen atoms.

Answer 2

4, 7, 4, 6

Step-by-step 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:

`4 NH_3 +7 O_2 \rightarrow 4 NO_2 +6 H_2 O`

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