Welcome to the Knowledge Mouse Online Quiz
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| Questions |
Answers |
| What is the osmotic pressure of a 0.075 M solution of aspartic acid at 18.5 C |
1.80 atm |
| The vapor pressure of water at 35 oC is 42.175 mm Hg. The vapor pressure of ethyl alcohol (C2H5OH) at 35 C is 100.5 mm Hg. What is the vapor pressure of a solution prepared by dissolving 250 g of C2H5OH in 375 g of H2O? |
48.3 mm Hg |
| How many grams of (NH4)3PO4 need to be added to 500. g of H2O so that the freezing point of the solution is lowered to –8.3 C? |
91 g |
| What is the osmotic pressure in mm Hg of 6.00L of a 0.108 M solution of barium chloride at 30C? |
6.13 x 103 mm Hg |
| An isotonic solution will produce an osmotic pressure of 7.84 atm measured against pure water at human body temperature (37.0 C). How many g of sodium chloride must be dissolved in a liter of water to produce an isotonic solution? |
9.01 g NaCl/L |
| A solution is prepared from 25.0 g of benzene, C6H6, and 2.50 g of an unknown compound. The freezing point of this solution is 4.3oC. The normal freezing point of benzene is 5.5 oC and the freezing point depression constant for benzene is –5.12 oC/m . D |
427 g/mol |
| A student needs to prepare an aqueous solution of sucrose at a temperature of 20o C with a vapor pressure of 15.0 mm Hg. How many grams of sucrose does she need if she uses 375 g H2O? |
1190 g |
