Question

consider the following chemical equation.
zns + o₂ → zno + so₂
which of the following balances the equation?
oa zn₂s + 2o₂ → 2zno + so₂
ob 2zns + 3o₂ → zn₂o + s₂o₂
oc 2zns + 3o₂ → 2zno + 2so₂
od 2zns + 6o₂ → 2zno + 2so₂

Explanation:

Step1: Check the number of Zn atoms

In the original equation \(ZnS + O_2
ightarrow ZnO+SO_2\), for option C:
Left - hand side: In \(2ZnS\), the number of \(Zn\) atoms is \(2\).
Right - hand side: In \(2ZnO\), the number of \(Zn\) atoms is \(2\).

Step2: Check the number of \(S\) atoms

Left - hand side: In \(2ZnS\), the number of \(S\) atoms is \(2\).
Right - hand side: In \(2SO_2\), the number of \(S\) atoms is \(2\).

Step3: Check the number of \(O\) atoms

Left - hand side: In \(3O_2\), the number of \(O\) atoms is \(3\times2 = 6\).
Right - hand side: In \(2ZnO\) there are \(2\) \(O\) atoms and in \(2SO_2\) there are \(2\times2=4\) \(O\) atoms. Total \(O\) atoms on the right - hand side: \(2 + 4=6\).

Answer:

C. \(2ZnS + 3O_2
ightarrow 2ZnO + 2SO_2\)