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Activity 3: PERCENTAGE BY MASS Percent by mass expresses the concentration of a solution in terms of the mass of solute in grams to the mass of the solution. For example, a salt solution of 10% concentration means that for every 100 grams of the solution it contains 10 grams of salt and 90 grams of water. Percent by mass can be computed using the equation: % mass mass of solute mass of solution x 100% Directions: Study the given problems and solve what is being asked for. 1. A solution contains 5 grams of salt and 195 grams of water. A. How many grams of solution are present? B. What is the percent by mass concentration of the solution? 2. A sugar solution has a mass of 500 grams. The solution contains 200 grams of sugar. A. How many grams of water is used in the solution?
Sagot :
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