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Which type of concentration is calculated when the grams of solute is divided by the grams of the solution, and the result is multiplied by 1 000 000?(1) molarity (2) parts per million

(3) percent by mass (4) percent by volume

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The correct answer is option 2. One
way of expressing concentration is by expressing it by parts per million or
ppm. It is calculated by dividing the grams of solute and the grams of the solution, and the result is multiplied by 1 000 000. Parts per million is equal to 1 milligram of solute per kilogram of
solution. 

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