Question

Zn + 2HCl → ZnCl₂ + H₂

How many moles of hydrogen are
produced from the reaction of three
moles of zinc with an excess of
hydrochloric acid?
STUDENT

Answer 1

The balanced chemical equation you provided is:

Zn + 2HCl → ZnCl₂ + H₂

From the equation, we can see that for every 1 mole of zinc (Zn) reacting, 1 mole of hydrogen gas (H₂) is produced. Therefore, the mole ratio of zinc to hydrogen is 1:1.

If you have 3 moles of zinc, you will produce an equal number of moles of hydrogen gas. Therefore, when 3 moles of zinc react with an excess of hydrochloric acid, 3 moles of hydrogen gas will be produced.

Step-by-step explanation: