Kiley wants to balance the equation h2 + n2 → nh3. which would be her first step in balancing an equation?

a: multiplying the subscripts in the atoms of the reactants together
b: adding the coefficient 3 in front of h2 and the coefficient 2 in front of nh3
c: changing the subscripts so they match for the total number of atoms
d: creating a chart that shows the number of atoms in the reactants and products

D: creating a chart that shows the number of atoms in the reactants and products

Explanation:

We say that a chemical reaction is balanced if the number of atoms of each element on the left side is equal to the number of atoms of the same element on the right side of the equation.

In this problem, we have the following reaction:

We see that the reaction is not balanced, because we have 2 atoms of H on the left and 3 on the right, and also 2 atoms of N on the left and 1 on the right.

The first step we took was, in fact, to determine the number of atoms in the reactants and the products. We can show them in a chart:

-----  Reactants    Products

H         2                  3

N         2                  1

so, the first step we took is

D: creating a chart that shows the number of atoms in the reactants and products

Then, we should do the following in order to balance the reaction:

B: adding the coefficient 3 in front of H2 and the coefficient 2 in front of NH3

So, the reaction balanced will be

(75°f − 32) × 5/9 = 23.889°c