The given question is incomplete. the complete question is:
Calculate the volume in liters of a 0.91 M magnesium fluoride solution that contains 249.2 g of magnesium fluoride . Round your answer to 2 significant digits.
Answer: 4.4 Liters
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

where,
n = moles of solute
To calculate the moles, we use the equation:

=volume of solution in L

Thus the volume in liters is 4.4 L
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Im not sure but i think its hbr. i hope im right and i hope this helped,
Answer:
37.8g/ 10.81g/mol = 3.4968...moles