What is the molarity of a solution made by dissolving 2.234 g of mgcl2 in enough water so that the final volume of the solution is 250.0 ml?

Molarity of a solution is the number of moles of solute divided by the liters of solution present. The molecular weight of magnesium chloride is 95.2 g/mol.

First, we compute the moles of magnesium chloride:
2.234 / 95.2 = 0.023 mol

The liters of solution are:
250 / 1000 = 0.25

Molarity = moles / liter
Molarity = 0.023 / 0.25

The molarity of the solution is 0.092.