When the equation Al Br2-AlBr3 is balanced the coefficient for Al is what?

The balanced equation for the reaction between aluminum (Al) and bromine (Br2) to form aluminum bromide (AlBr3) is 2 Al + 3 Br2 → 2 AlBr3. In this balanced equation, the coefficient for Al is 2. This means that two aluminum atoms are required to react with three bromine molecules to produce two formula units of aluminum bromide.