Question

the number of moles of hcl required to react with 3 moles of Zn is

Answer 1

The chemical equation for the reaction is:

Zn + HCl ----------> ZnCl2 + H2↑

So, 3 moles of Zn will react with 3 moles of HCl.

Hence the answer is 3 moles of HCl .