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1. 1.00 * 10-3 of compound A was dissolved in enough water to make 1.00 mL of solution. The osmotic pressure of this solution was found to be 1.12 torr at 25oC. Calculate the molar mass.
6.01 * 10-5 g 1.66 * 104 g 1.66 g 6.01 g 5.12 g

2. HCl reacts with NaOH to form water and NaCl. What volume of 0.500 HCl is required to yield 2.00 g of NaCl?
0.0684 mL 0.0342 mL 68.4 mL 34.2 mL None of these

3. A solution is made by dissolving 25.8 g urea (CH4N2O) a nonelectrolyte, in 275 g water. Calculate the vapor pressure at 25oC (Vapor pressure of water at 25oC is 23.8 torr)
97 torr 23.2 torr 23.8 torr 0.97 torr 24 torr

4. A 0.107 g sample of an unknown diprotic acid is titrated to the equivalence point using 50.0 mL of 0.206 M NaOH. Calculate the molar mass of the acid.
0.00515 g 20.8 g 0.0103 g 36.5 g 147 g

5. Something dissolves in water to form a 2 m solution. If 2.0 liters contains 200 grams of the substance, then what is the molecular mass of the substance?
25 g/mol 50 g/mol 75 g/mol 100 g/mol 125 g/mol

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