Question

best viewed at 75% or 90%.
a how many moles of zinc (in mol) are needed in order to produce 1.24 mol of zinc chloride?
zn + 2 hcl → zncl₂ + h₂

Explanation:

Step1: Analyze the chemical equation

The balanced chemical equation is $\ce{Zn + 2HCl -> ZnCl_{2} + H_{2}}$. From this equation, we can see that the mole ratio of $\ce{Zn}$ to $\ce{ZnCl_{2}}$ is $1:1$.

Step2: Use the mole ratio to calculate moles of Zn

Given that the moles of $\ce{ZnCl_{2}}$ produced is $1.24$ mol. Since the mole ratio of $\ce{Zn}$ to $\ce{ZnCl_{2}}$ is $1:1$, the moles of $\ce{Zn}$ needed is equal to the moles of $\ce{ZnCl_{2}}$ produced. So, moles of $\ce{Zn}$ = $1.24$ mol.

Answer:

$1.24$ mol