Answer:
In this equation, you need to have in mind that the molecules on the left are the reactants and the molecules on the right are the products.
Therefore:
- Reactants: [tex]CH_4 +4BR_2[/tex]
- Products: [tex]\boxed{CBr_4+HBr}[/tex]
Observe that this is a general rule in chemistry, in every reaction the reactants will be on the left side of the arrow, unless it is a reversible reaction ([tex]\leftrightharpoons[/tex]), in which both sides are both reactants and products at the same time.
