1. Balanced Chemical Equation:

First, we need the balanced chemical equation for the reaction between aluminum (Al) and chlorine gas (Cl₂) to form aluminum chloride (AlCl₃):

2 Al + 3 Cl₂ → 2 AlCl₃

2. Mole Ratio:

From the balanced equation, we see that 2 moles of aluminum react to produce 2 moles of aluminum chloride. This gives us a mole ratio of 2:2, which simplifies to 1:1.

3. Calculation:

Since the mole ratio is 1:1, 0.440 moles of aluminum will produce 0.440 moles of aluminum chloride.