Question

Zinc metal reacts with hydrochloric acid (HCl) according to the equation:
Zn(s)+HCl(aq)=ZnCl2(aq)=H2(g)
How many grams of H2 are produced if 100 grams of zinc reacts?

Answer 1

1. You have the balanced equation.
2. Convert 100 g Zn to moles. moles = grams/molar mass.
3. Using the coefficients in the balanced equation, convert moles Zn to moles H2.
4. Now convert moles H2 to grams. g = moles x molar mass.

Answer 2

1105.2g