The common laboratory solvent ethanol is often used to purify substances dissolved in it. The vapor pressure of ethanol, CH3CH2OH, is 54.68 mm Hg at 25 °C. The molecular weight of ethanol, CH3CH2OH, is 46.07 g/mol. In a laboratory experiment, students synthesized a new compound and found that when 26.79 grams of the compound were dissolved in 150.7 grams of ethanol, the vapor pressure of the solution was 53.17 mm Hg. The compound was also found to be nonvolatile and a nonelectrolyte. What is the molecular weight of this compound?

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Q: Which of the following molecules is cyclopentyldiethylamine?

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Q: Which of the following bonds is the shortest in length? (a) C-O (b) C-Si O=O C-Br (d)

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.