Question

In the reaction HBr + Al AlBr3 + H2, which two substances would have a coefficient of 2 if the reaction were balanced?

Check all that apply.

A. H2
B. Al
C. HBr
D. AlBr3

Answer 1

I believe the correct answers are B and D. The two substances that would have a coefficient of 2 are Al and AlBr3. In balancing the reaction, both sides should have the same number of element. The balanced reaction would be 6HBr + 2Al = 2AlBr3 + 3H2.