Answer:
1.74 moles of HCl
Step-by-step explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
Fe + 2HCl —> FeCl₂ + H₂
From the balanced equation above,
1 mole of Fe reacted with 2 moles of HCl.
Finally, we shall determine the number of mole of HCl required to react with 0.87 moles of Fe. This can be obtained as illustrated below:
From the balanced equation above,
1 mole of Fe reacted with 2 moles of HCl.
Therefore, 0.87 moles of Fe will react with = 0.87 × 2 = 1.74 moles
Thus, 1.74 moles of HCl is needed for the reaction.