Answer:
there are eight electrons
hydrogen + oxygen = water
2Al + 6HBr → 2AlBr₃ + 3H₂
Explanation:
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)