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1. What is the molality (m)of a solution that has 3.45grams of calcium nitrate and 755grams of water? |
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1. What is the freezingpoint of a solution of ethyl alcohol, C2H5OH, that contains 20.0g of the solute in 250.g of water? |
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2. What mass of lithium chloride do you need to get a 0.820m solution if you have 355grams of water? |
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2. How many grams of ethylene glycol, C2H4(OH)2, must a researcher add to 500.g of water to yield a solution that freeze at -7.44degC? |
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3. What mass (in kilogram) of a water do you need to have to make a 1.25m zinc sulfate solution if you have 4.54 grams of the solid. |
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3. Calculate hte mass of a mole of a compound (i.e. g/mole) that raises the boiling point of water to 100.78degC when 51g of the compound is dissolved in 500.g of water? |
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Answer:1)0.0279m 2)12.5g 3)0.0226kg |
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Answer:1)-3.23degC 2)124g 3)68g |