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Calculate the mole fraction of phosphoric acid (H3PO4) in a 26.6% (by mass) aqueous solution.

What is the freezing point (°C) of a solution prepared by dissolving 11.3 g of Ca(NO3)2 $download?verifier=4mzsnVWmkkWIzZ7GAJl58a$ in 115 g of water? The molal freezing point depression constant for water is $download?verifier=6WPqUgxh04i4DJYNH3Qm2h$

The concentration of CO2 in a soft drink bottled with a partial pressure of CO2 of 4.0 atm over the liquid at 25 °C is 1.2 × 10-1 M. The Henry's law constant for CO2 at this temperature is ________.

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The concentration of urea (MW = 60.0 g/mol) in a solution prepared by dissolving 16 g of urea in 39 g of H2O is ________ molal.

The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapor pressure of ________ atm.

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Calculate the vapor pressure of a solution made by dissolving 109 grams of glucose $download?verifier=7nZhXidzUdAYYYsLyKtvDK$ in 920.0 ml of water at 25 °C. The vapor pressure of pure water at $download?verifier=Rkag3eWSjGyPOdiEGAp4Cx$ is $download?verifier=ZnPPiN445e7d9CX10pTGvZ$ . Assume the density of the solution is 1.00 g/ml.

George is making spaghetti for dinner. He places 4.01 kg of water in a pan and brings it to a boil. Before adding the pasta, he adds 58 g of table salt (NaCl) to the water and again brings it to a boil. The temperature of the salty, boiling water is ________°C.

Assume a pressure of 1.00 atm and negligible evaporation of water. Kb for water is $download?verifier=Z21wOh1h5zUQ0G75GY00oK$

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Answer 1

ue cam assume hat we have loo ofSalutor Solchon will have 266 g ot H3poy and 73-4 a =97-99 g l mee. Hapoy = Mass H3PCY Melan mass of H3PO4 26.6 17-99 0.271 mol Moles 0 waterニー13-4 二4.07 mb 1 8 H3 Poy Moles ot h3 Poy males of wasv 二 0.27/ 4.34 = 0.271 0 211 + 4.07 Mass ot Ca CN3 Molo. mass" = 164 gYmol. Massa watn =11% 2 kf 1.86"c/m = depvessinm Point esncenolon depve ssion

Molan mass of uvea6oa/mot Mess uvee = 16 Mass wata= 39a males avea 16 6o F 0.866 mot .039 moles o.031 conedratien