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1.The freezing point of benzene is 5.5 °C. What is the molar mass of a nonionizing...

1.The freezing point of benzene is 5.5 °C. What is the molar mass of a nonionizing solute if 1.99 grams of the solute added to 20.62 g of benzene lowers the freezing point to 3.44. The Kf of benzene is -5.12 °C/m. Record your answer as a whole number.

2.Water has a Kf of -1.86 °C/m. Calculate the new freezing point of an aqueous solution made by mixing 38.66 g water and 1.64 g MgCl2.

3.Ethanol has a Kb of 1.22 °C/m and usually boils at 78.4 °C. How many mol of an nonionizing solute would need to be added to 41.63 g ethanol in order to raise the boiling point to 83.3.

4.A solute is a strong electrolyte that ionizes into 2 ions. What is the molar mass of this solute if 15.89 grams added to exactly 1 kg of solvent change the boiling point by 0.617. (The Kb value for this solute is 0.727 °C/m). Record your answer as a whole number.

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Answer #1

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From .the Yeta忾on /АТр ?kym pee 3866952 っ5.58 x 1CHO 3 6 80.85 3 For ethanol

Mass os ethanol 06 s 4.01 쓰 moleso6 monionisinasuute mass ot ethano moles honionist So ta te 0.166 Motes nonionicTRe stYn eechoe tonites nt a ion , the LetMbe the molar mass mass o Solvent As we knous molalits m moles o Solute dT6- Change

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