Question

1. which chemical equation is correctly balanced?

2 kcl(s) = 2 k(s) + cl₂(g)
n₂(g) + h₂(g) = nh₃(g)
h₂(g) + o₂(g) = h₂o(g)
2 nacl(s) = na(s) + cl₂(g)
clear all

Explanation:

Step1: Count atoms in \(2KCl(s)\to2K(s)+Cl_2(g)\)

For \(K\): Left - \(2\), Right - \(2\). For \(Cl\): Left - \(2\), Right - \(2\).

Step2: Count atoms in \(N_2(g)+H_2(g)\to NH_3(g)\)

For \(N\): Left - \(2\), Right - \(1\). For \(H\): Left - \(2\), Right - \(3\). Unbalanced.

Step3: Count atoms in \(H_2(g)+O_2(g)\to H_2O(g)\)

For \(H\): Left - \(2\), Right - \(2\). For \(O\): Left - \(2\), Right - \(1\). Unbalanced.

Step4: Count atoms in \(2NaCl(s)\to Na(s)+Cl_2(g)\)

For \(Na\): Left - \(2\), Right - \(1\). For \(Cl\): Left - \(2\), Right - \(2\). Unbalanced.

Answer:

\(2KCl(s)\to2K(s)+Cl_2(g)\)