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29.09.2019 •
Chemistry
What moving faster a golf ball or bowling ball
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Ответ:
Ответ:
Ответ:
170 g
Explanation:
w/w% concentration = mass of solute/ mass of solution * 100
mass of solute = x
mass of solution = 200 g
w/w% concentration = 15 % by mass
15 = x/200 * 100
15 = 100x/200
200 * 15 = 100x
x = 200 * 15/100
x = 2 * 15
x = 30g
But mass of solution = mass of solute + mass of solvent
mass of solute = 30g
mass of solvent = mass of solution - mass of solute
mass of solvent = 200 g - 30 g
mass of solvent = 170 g