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You can practice converting between the mass of a solution and mass of solute when the mass percent concentration of a solution is known. The concentration of the KCN solution given in Part A corresponds to a mass percent of 0.173 %. What mass of a 0.173 % KCN solution contains 779 mg of KCN

Respuesta :

Answer:

450. g of 0.173 % KCN solution contains 779 mg of KCN.

Explanation:

Mass of the solution = m

Mass of the KCN in solution = 779 mg

Mass by mass percentage of KCN solution = 0.173%

[tex](m/m)\%=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100[/tex]

[tex]0.173\%=\frac{779 mg}{m}\times 100[/tex]

[tex]m=\frac{779 mg}{0.173}\times 100= 450,289 mg[/tex]

1 mg = 0.001 g

m = 450,289 mg × 0.001 g = 450.289 mg ≈ 450. g

450. g of 0.173 % KCN solution contains 779 mg of KCN.

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