Question

масса р-ра 200 г w-15% Найти w (соли) и H2O ?

Answer 1

w(соли) = 15%

w(H2O) = 100% - 15% = 85%

и m(соли) = 200*0,15 = 30 г

m(H2O) = 170 г
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Answer 2

Calculation of the Mass of Water (H2O)

To find the mass of water (H2O) in a solution with a total mass of 200 g and a solute concentration of 15%, we can use the following steps:

1. Calculate the mass of the solute (w): - The solute concentration is given as 15%, which means that 15% of the total mass is the solute. - Therefore, the mass of the solute (w) can be calculated as 15% of 200 g: - w = 15/100 * 200 g = 30 g

2. Calculate the mass of water (H2O): - Since the total mass of the solution is 200 g and the mass of the solute is 30 g, the mass of water (H2O) can be calculated as the difference between the total mass and the mass of the solute: - Mass of water (H2O) = Total mass - Mass of solute = 200 g - 30 g = 170 g

Therefore, the mass of water (H2O) in the solution is 170 g.

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