Chemistry: An aqueous solution is made by dissolving 26.4 grams of copper(II) acetate in 367 grams of water. The molality of copper(II) acetate in the solution is

the answer is D that is the only one that makes sense. plz tell me if wrong...

An aqueous solution is made by dissolving 26.4 grams

carolinasantos2

20.01.2022

The molality of copper(II) acetate in the solution is 0.3960 mol/kg.

Explanation:

Mass of copper(II) acetate = 26.4 g

Molar mass of copper(II) acetate = 181.63 g/mol

Moles of copper(II) acetate =- $\frac{26.4 g/mol}{181.63 g/mol}=0.14535 mol$

Mass of water = 367 g = 367 × 0.001 kg ( 1 g = 0.001 kg)

$Molality(m)=\frac{\text{moles of solute}}{\text{mass of solvent (kg)}}$

$m=\frac{0.14535 mol}{367\times 0.001 kg}=0.3960 mol/kg$

The molality of copper(II) acetate in the solution is 0.3960 mol/kg.

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