Question

zn + h₂s → zns + h₂
which reaction shows the correctly balanced equation?
3zn + 3h₂s → 3zns + 3h₂
2zn + h₂s → 2zns + h₂
zn + 2h₂s → zn₂s₂ + 2h₂
zn + h₂s → zns + h₂

Explanation:

Step1: Count atoms on both sides

For \(Zn\): \(1\) atom on left (\(Zn\)) and \(1\) atom on right (\(ZnS\)).
For \(H\): \(2\) atoms on left (\(H_2S\)) and \(2\) atoms on right (\(H_2\)).
For \(S\): \(1\) atom on left (\(H_2S\)) and \(1\) atom on right (\(ZnS\)).

Answer:

\(Zn + H_2S
ightarrow ZnS + H_2\)