Calculate the molarity of a solution created by pouring $7.62\; grams$ of $MgCl_2$ into enough water to create 400 mL of solution.

Question

$\begin{array}{1 1} (a)\;0.2\;M \\ (b)\;0.3\;M \\ (c)\;0.1\;M \\ (d)\;0.4\;M\end{array}$