Juanita dissolves 46 g of MgBr sub 2 (molar mass: 184 point 1 1 g over mol ) in 0 point 5 kilograms of distilled water. What is the molality of the solution? Use molality is equal to moles of solute over kilograms of solvent

First find the moles of MgBr₂: 46 g ÷ 184.11 g/mol ≈ 0.250 mol. Molality is moles of solute divided by kilograms of solvent, so 0.250 mol ÷ 0.5 kg = 0.50 m. The correct choice is A, 0.5 m.

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