We can do this by dividing the given mass of $\mathrm{MgCl}_{2}$ by its molar mass. The molar mass of $\mathrm{MgCl}_{2}$ is 95.21 g/mol. So, the number of moles of $\mathrm{MgCl}_{2}$ is given by:
\[ \text{moles of } \mathrm{MgCl}_{2} = \frac{\text{mass of }
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