Respuesta :

JцstinBieber
1 ml H2O = 1 g H2O

1000 g H2O = 1000 mL H2O = 1 L H2O

molarity = mol/volume

[MgCl2] = 1.2 mol / 1 L = 1.2 M
but one significant digit: 1 M

Answer: The molality of the solution is 1.2 m.

Explanation:

To calculate the molality of the solution, we use the equation:

[tex]\text{Molality of the solution}=\frac{\text{Moles of solute}}{\text{Mass of solvent (in kg)}}[/tex]

We are given:

Moles of [tex]MgCl_2[/tex] (solute) = 1.2 moles

Mass of water (solvent) = 1000 g = 1 kg     (Conversion factor: 1 kg = 1000 g)

Putting values in above equation, we get:

[tex]\text{Molality of the solution}=\frac{1.2mol}{1kg}=1.2mol/kg=1.2m[/tex]

Hence, the molality of the solution is 1.2 m

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