1. What is the percent by mass concentration of a sugar solution that contains 10 g of sugar dissolved in 20 g of water?
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2. How many grams of sodium chloride are present in a 250 ml salt solution containing 9% sodium chloride?
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3. A bottle of Hydrogen peroxide (H202) also known as "agua oxinada" is labeled 5% by volume. How many mL of agua oxinada are in a 500 ml bottle of this solution?
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2. How many grams of sodium chloride are present in a 250 ml salt solution containing 9% sodium chloride?
.
.
.
.
3. A bottle of Hydrogen peroxide (H202) also known as "agua oxinada" is labeled 5% by volume. How many mL of agua oxinada are in a 500 ml bottle of this solution?
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Answers & Comments
1. 20 mL of water weighs 20 g.
So % sugar = 10 g sugar/30 g solution =33.3 % by mass
And % water = 20 g water/30 g solution =66.7 % by mass.
2. 27.7777777778 or 28
3. 20
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