Question

Chemistry 1A

Fe(s) + 2 HBr(aq) ----> FeBr2(aq) + H2(g)

What mass of HBr (in g) would you need to dissolve a 3.2-g pure iron bar on a pad lock? what mass of H2 would the complete reaction of the iron bar produce?

Answer 1

Use the equation mass=mr x moles.

Answer 2

First calculate how many moles of iron you have.