An aqueous solution of ethylene glycol HOCH2CH2OH used as an automobile engine coolant is 40.0% HOCH2CH2OH by mass and has a density of 1.05 g/mL. What are the (a) molarity, (b) molality, and (c) mole fraction of HOCH2CH2OH in this solution?

Q: 20) At 23.0°C, the vapor pressure of acetonitrile, CH3CN, is 81.0 torr while that of acetone, C3H6O,…

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Q: the molality of Cu(NO3)2 in a solution containing 38.5g Cu(NO3)2 in 154.1g of water.

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Q: The vapor pressure of pure acetone, CH3C(O)CH3, at30°C is 0.3270 atm. Suppose 15.0 g of…

A: The molar mass of acetone is 58.09 g/mole The molar mass of benzophenone is 182.217 g/mole

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Q: Calculate the molality of each of the following solutions: (a) 8.66 g of benzene (C6H6) dissolved in…

A: (a)Number of moles of benzene is determined to calculate its molality.

Q: The density of toluene 1C7H82 is 0.867 g>mL, and the density of thiophene 1C4H4S2 is 1.065…

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Q: What is the molality of a solution prepared by dissolving 80.2  g of ethylene glycol, HOCH2CH2OH, in…

A: We have to calculate molality of solution. For this we have to first determined mass of solvent ie…

Q: Vanillin, C8H8O3, occurs naturally in vanilla extract and is used as a flavoring agent. A 47.2 mg…

A: Molality of the solution is the number of moles of solute present in one kilogram of solvent. It is…

Q: What is the molality of a solution

A: Molality = number of moles of solute/mass of solvent in kilogram  Number of moles = mass/molar mass

Q: A biochemical engineer isolates a bacterial gene fragment and dissolves a 10.0-mg sample in enough…

A: Mass of bacterial gene fragment = 10 mg  1 mg = 10-3 g  Mass of bacterial gene fragment = (10 ×…

Q: Example: Calculate the molality of 25.0 grams of KBr dissolved in 750.0 mL pure water.

A: Molarity = mole / volume in Liter  Mole = mass / molar mass

Q: A sulfuric acid solution containing 571.6 g of H2SO4 per liter of solution has a density of 1.329…

A: (a) Mass percentage is calculated

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Q: A solution contains 14.6 g of the substance bolognium and 14.6 g of caterium. Assuming ideal…

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Q: A nonvolatile solute is dissolved in benzene and the resulting solution has a vapor pressure of 20.1…

A: According to the Raoult's law, the vapour pressure of a non-volatile solute solution is given by…

Q: A solution of KCl in water has Xkcl= .0700. What is the molality?

A: A KCl solution consists of KCl salt as the solute and water as the solvent. Mole fraction of any…

Q: What is the molality of a solution composed of 3.25 g methanol (CH3OH) and 250 mL of water?

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Q: A nonvolatile solute is dissolved in benzene and the resulting solution has a vapor pressure of 18.5…

A: Given -    vapor pressure of =18.5 torr    P° of benzene is = 26.5 torr    P = Npo  ( Raoult's…

Q: acid, CH3COOH, is 1.0187 g/mL. What is (a) the molarity? (b) the molality? (c) the mole fraction of…

A: Molarity is the moles of solute in 1 L of solution. Molarity=moles of solutevolume of solution (L)…

Q: What is the molality of ethanol in a solution made by dissolving 14.6 g of ethanol, C2H5OH, in 53.6…

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Q: A solution of H2SO4(aq) with a molal concentration of 6.80 ? has a density of 1.318 g/mL. What is…

A: Given:Density = 1.318 g/mLMolal conc. = 6.80 We need to find the molar concentration of this…

Q: 4. The density of acetonitrile (CH3CN) is 0.786 g/mL and the density of methanol (CH3OH) is 0.791…

A: Mole fraction of x = no.of moles of x/total moles  Molality is the ratio of moles of solute to the…

Q: What mass of H2O is needed to dissolve 4.69 g KMnO4 to produce a solution having a molality of 0.299…

A: Given, mass of KMnO4 = 4.69 g Molar mass of KMnO4 = 158.03 g/mol Molality of the solution (m) =…

Q: A solution is prepared by dissolving 215 g of methanol, CH3OH, in 1000 mL of water. What is the…

A: Given: Mass of methanol i.e. CH3OH = 215 g And volume of water = 1000 mL Since density of water = 1…

Q: 3.What is the molality(m) of a solution made from dissolving 179g.of MgCl2 into 1.00L of water?

A: Mass of MgCl2 = 179 g  Volume of water = 1.00 L We need to determine the molality of solution.

Q: Calculate the molality of a solution of 95 grams of nitric acid (HNO3) in 2.5 liters of water.

A: The question is based on the concept of solutions.   Molality is a method of expressing…