Question

1. _ al + _ s → _ al₂s₃

Explanation:

Step1: Balance Aluminium (Al)

On the right - hand side, there are 2 Al atoms in \(Al_2S_3\). So, we put 2 in front of Al on the left - hand side: \(2Al+S
ightarrow Al_2S_3\).

Step2: Balance Sulphur (S)

On the right - hand side, there are 3 S atoms in \(Al_2S_3\). So, we put 3 in front of S on the left - hand side: \(2Al + 3S
ightarrow Al_2S_3\).

Answer:

\(2Al+3S
ightarrow Al_2S_3\)