Question

its time for the unit exam. this is your opportunity to show how if you dont feel ready, you may want to stop and clarify anything over any notes you have taken and review the key terms. good luck! note: to answer some of the questions, it may help to reference a p examine the reaction. nh₄oh(aq) → h₂o(l) + nh₃(g) what coefficients will balance the equation? 1, 2, 2 1, 1, 1 3, 3, 4 2, 1, 2

Explanation:

Step1: Count atoms on each side

Count the number of atoms for each element on the reactant ($\text{NH}_4\text{OH}$) and product ($\text{H}_2\text{O}$ and $\text{NH}_3$) sides.
For $\text{N}$: 1 on reactant side (in $\text{NH}_4\text{OH}$), 1 on product side (in $\text{NH}_3$).
For $\text{O}$: 1 on reactant side (in $\text{NH}_4\text{OH}$), 1 on product side (in $\text{H}_2\text{O}$).
For $\text{H}$: 5 on reactant side ($4$ in $\text{NH}_4$ and $1$ in $\text{OH}$), 5 on product side ($2$ in $\text{H}_2\text{O}$ and $3$ in $\text{NH}_3$).

Step2: Check coefficients

If we use coefficients $1,1,1$ (i.e., $1\text{NH}_4\text{OH}(aq)
ightarrow1\text{H}_2\text{O}(l)+1\text{NH}_3(g)$), the number of atoms for each element ($\text{N}$, $\text{O}$, $\text{H}$) is balanced on both sides.

Answer:

1, 1, 1