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1. 25.00 g of an unknown salt of formula MX3 is dissolved in 2000. g H2O. The freezing point of the solvent is -50.0oC. Find the formula weight.
6.49 g 1.49 g 7.44 g 10.44 g 64.32 g

2. Which statement is false:
if a nonvolatile solute is added to a solvent, the vapor pressure of the solvent is lowered DHsolution">salts have a low DHsolution the amount of gas dissolved is directly proportional to the pressure of the gas above the solution heating always helps the solute dissolve in the solvent All statements are FALSE

3. Van't Hoff's factor, i is incoporated into some equations due to
a constant value that adjust for the pressure in the lab some electrolytes break up into ions a correction factor that makes data match up with hypothesis Van't Hoff factor I is a constant that corrects all osmotic equations none of the above

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. How many grams of NaOH are contained in 250 mL of 0.500 M NaOH?
0.125 g 5 g 10 g 0.25 g 0.5 g

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