42) How many grams of solution are present if a solute is dissolved in 630 g of water and the concentration is 12.7% by mass? A) 55.0 B) 0.00722 C) 72.2 D) 20.2 E) 1.39 Answer: C

Question

42) How many grams of solution are present if a solute is dissolved in 630 g of water and the concentration is 12.7% by mass? A) 55.0 B) 0.00722 C) 72.2 D) 20.2 E) 1.39 Answer: C

Answer 1

To solve this problem, we need to find the mass of the solute dissolved in the solution.Given information:- The concentration of the solution is 12.7% by mass.- The mass of water is 63.0 g.The formula to calculate the mass of the solute is:Mass of solute = (Concentration by mass × Total mass of solution) / 100Substituting the given values:Mass of solute = (12.7 × (63.0 + x)) / 100Where x is the mass of the solute.Solving for x:12.7 × (63.0 + x) = 100x783.1 + 12.7x = 100x783.1 = 87.3xx = 783.1 / 87.3x ≈ 8.96 gTherefore, the mass of the solute dissolved in the solution is approximately 8.96 g.The correct answer is C) 72.2.

Soru

42) How many grams of solution are present if a solute is dissolved in 630 g of water and the concentration is 12.7% by mass? A) 55.0 B) 0.00722 C) 72.2 D) 20.2 E) 1.39 Answer: C

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