The freezing point of t-butanol is 25.50oC and Kf is 9.1oC kg/mol. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 10.0-g sample of t-butanol is 24.59oC, how many grams of water are present in the sample?
Answer to relevant QuestionsIf the fluid inside a tree is about 0.1 M more concentrated in solute than the groundwater that bathes the roots, how high will a column of fluid rise in the tree at 25oC? Assume that the density of the fluid is 1.0 g/cm3. ...A bottle of wine contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. You add an excess of solid MX in 250 g of water. You measure the freezing point and find it to be 20.028oC. What is the Ksp of the solid? Slaked lime [Ca(OH)2] is used to soften hard water by removing calcium ions from hard water through the reaction Ca(OH)2(aq) + Ca2+(aq) + 2HCO3-(aq) → 2CaCO3(s) + 2H2O(l) From the information on the temperature stability of white and gray tin given in this chapter, which form would you expect to have the more ordered structure (have the smaller positional probability)?
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