How many moles of nickel will react with 9.71 mol m o l of hydrochloric acid.

Question

How many moles of nickel will react with 9.71 molmol of hydrochloric acid.

Answer 1

First, write the balanced chemical reaction:

Ni (s) + 2 HCl (aq) --> NiCl₂ (aq) + H₂ (g)

From above, you can see that for every 1 mol of Ni that reacts, 2 mol of HCl is needed, which is your mole ratio for the stoichiometry conversion.

9.71 mol HCl x (1 mol Ni / 2 mol HCl) = 4.86 mol Ni (rounded to 3 significant figures)