Respuesta :

Answer:

2Al   +   6HBr    →   2AlBr₃   +   3H₂

Explanation:

2Al   +   6HBr    →   2AlBr₃   +   3H₂

2 Al in reactant side

2 Al in product side

6 Br in reactant side

6 (2x3) Br in reactant side

6 H in reactant side

6 H in product side (3x2)