A solution made by dissolving 150.0 g of an unknown compound in 440.0 mL of benzene to make a solution which has a freezing point 18.6 °C lower than that of pure benzene. Kf for benzene is 5.12 °C/m and the density of benzene is 0.877 g/mL. a) What was the molality of the solution? b) How many moles of the unknown compound were dissolved in the solution? c) what is the molar mass of the unknown compound?

Q: What is the lowest freezing temperature for a saltwater solution? The solubility of sodium chloride…

A: Given,  Mass of NaCl = 280 g  Molar mass of NaCl = 58.5 g/mol  Number of moles = 280/58.5 mol…

Q: The freezing point of pure benzene is 5.49 C. The freezing point of a solution made using toluene in…

A:

Q: What is the molality of a solution prepared by dissolving 85.0  g of ethylene glycol, HOCH2CH2OH, in…

A: The molality of a solution prepared by dissolving 85.0  g of ethylene glycol, HOCH2CH2OH, in 1.55  L…

Q: What is the molality of a solution in which 12 g of NaCl is dissolved in 19 Kg of water?

A: Molality: It is the amount of solute that is present per kilogram of a solution. In mathematical…

Q: A solution made by dissolving 150.0 g of an unknown compound in 370.0 mL of benzene to make a…

A: An unknown compound is dissolved in the benzene to make a solution. The mass of the unknown…

Q: What mass of NaNO3 should be dissolved in 45 mL of water so that the resulting solution freezes to…

A:

Q: A solution was prepared by dissolving 11.0 g of compound in 270.0 g of ethanol raising the boiling…

A: Given data, mass of compound= 11.0 g  mass of ethanol = 270.0 g = 0.270 Kg  (but no need of that…

Q: What is the freezing point of a solution containing 2.80 grams benzene (molar mass = 78.11 g/mol)…

A:

Q: A solution made by dissolving 150.0 g of an unknown compound in 320.0 mL of benzene to make a…

A:

Q: A solution is prepared by dissolving 32.5 g of glucose (180.156 g/mol) in 593. g of water (18.015…

A: Given mass of Glucose = 32.5 gram Molar mass of Glucose = 180.156 g/mol Moles of Glucose =…

Q: A solution made by dissolving 150.0 g of an unknown compound in 420.0 mL of benzene to make a…

A: Given: Volume of benzene i.e. solvent used = 420.0 mL. Molality of solution = 3.63 m And density of…

Q: A commercial bleach solution contains 3.62 mass percent NaOCl in water. Calculate the molality of…

A: Given: The mass% of NaOCl=3.62% The mass% of water=96.32% The mass of NaOCl=3.62 g The number of…

Q: solution is prepared by dissolving 104.1 grams of barium chloride, BaCl2 in 1000. grams of water?…

A: Depression in freezing point.

Q: Calculate the molality of the following solution: 65g of KCl in 46.6g of water.

A: Given, mass of KCl = 65 g we know, molar mass of KCl = 74.5513 g/mol => moles of KCl = mass of…

Q: What is the molality of a solution made by dissolving 26.3 g of C6H12O6 into 125.0 ml of water?…

A: Answer:- This question is answered by using the simple concept of calculation of molality using the…

Q: What is the molality of an aqueous solution that is 10.0% ethanol, C2H5OH, by mass? Select one: a.…

A:

Q: Calculate the molality of a solution that contains 81.2 g of naphthalene, C10H8 , in 500. mL of…

A: given, the mass of naphthalene = 81.2g the volume of carbon tetrachloride = 500. mL the density of…

Q: Calculate the molality of a solution containing 19.6 g of sulfuric acid in 500.0 g of water.

A: Given, mass of sulfuric acid = 19.6 g mass of water = 500 g and we are asked to calculate the…

Q: A solution made by dissolving 150.0 g of an unknown compound in 410.0 mL of benzene to make a…

A: Given, molality = 3.63  We know,    molality= no. of moles of solute/mass of…

Q: A solution made by dissolving 150.0 g of an unknown compound in 200.0 mL of benzene to make a…

A:

Q: A solution was prepared by dissolving 12.0 g of glucose (180 g/mol) in 150. mL solution. What is the…

A:

Q: A commercial bleach solution contains 3.62 mass percent NaOCl in water. Calculate the molality of…

A: The mass of the solute present in 100g of the solution is called the mass percentage of the…

Q: 5) The density of a 2.45 M aqueous solution of methanol (CH3OH) is 0.976 g/mL. What is the molality…

A:

Q: 6 What is the molality of the solution obtained by dissolving 2.25 g of glucose in 240 grams of…

A: Given,

Q: What is the molality of a solution consisting of 44.0 mL of benzene (C₆H₆; d=0.877 g/mL) in 167 mL…

A: Molality is the concentration term which is defined as the number of moles of solute per kg of…

Q: What is the molality of a solution prepared by dissolving 23 g of ethanol in 200 g of water?

A: Mass of ethanol = 23 gMolar mass of ethanol =46 g/moleNo of moles of ethanol = Mass of ethanolMolar…

Q: A 0.194-g sample of a nonvolatile solid solute dissolves in 9.82 g of cyclohexane. The change in the…

A: The question is based on the concept of solutions. depression is freezing point is a colligative…

Q: What is the molality of a solution prepared by dissolving 45.7 g of MgClz in 2.40 kg of water?

A: Given that, Mass of solute (MgCl2) =45.7 g Molar mass of MgCl2 = 95.211 g mol-1 mass of solvent…

Q: The density of an aqueous solution containing 10.0 percent of ethanol (C2H5OH) by mass is 0.984…

A: Recall the expression for molarity and molality as follows            Molarity=moles of…

Q: (a) Calculate the molality (m) of a 0.310 molar (M) aqueous Ca(NO3)2 solution. The density of the…

A: The ratio of moles of solute to the volume of solution in liters is known as molarity. The ratio of…

Q: A solution made by dissolving 150.0 g of an unknown compound in 375.0 mL of benzene to make a…

A:

Q: What is the molality of a solution containing 7.3g of potassium chloride in 5kg of water?     None…

A: Mass of KCl = 7.3 g  Volume = 5 Kg Molality = ?

Q: The boiling point of a solution made up of ethylene glycol (C2H6O2) and 50 g of water is 100.85°C.…

A: To Solve this problem first we have to calculate the molality of the Solution then we will calculate…

Q: 21. 250. 0 ml of 1.00 M NAOH solution has a density of 1.90 g/mL. Calculate the concentration of…

A: According to our policy we should solve one question(If any subparts present than first three…

Q: Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH 3OH (d= 0.792 g/mL)…

A: Given: volume of CH3OH = 25.5 mL density of CH3OH = 0.792 g/mL volume of CH3CH2CH2OH = 387 mL…

Q: 82.4 g urea (molar mass = 60.06 g/mol) is present in 212 mL of a solution at 35 ºC. What is the…

A:

Q: What is molality of a solution prepared by dissolving 20g MgCl2 in 250 g water?

A: We have to calculate the molality of solution.

Q: The density of a 2.45 M aqueous solution of methanol (CH3OH) is 0.976 g/m. What is the molality of…

A: Molarity of CH3OH (M) = 2.45 M Molar mass of methanol = 32.04 g/mol density of methanol = 0.976 g/L

Q: Calculate the molality of a solution that contains 81.2 g of naphthalene, C10H8 , in 500. mL of…

A: Since molality is defined as the moles of solute present in per Kg of solvent  Hence molality =…

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: 1. What is the molality of a solution containing 48.2g of CaO in 392g of solvent? 2. What is the…

A: Given data: 1) Weight of CaO = 48.2 g Weight of solvent = 392 g 2) Moles of solute = 4.79 moles…

Q: A solution is prepared by mixing 1.00 g of ethanol (C2H5OH) with 100.0g of water to give a final…

A: Given mass of ethanol = 1 g mass of water = 100 g volume of solution = 101 ml molar mass of water =…

Q: The density of acetonitrile 1CH3CN2 is 0.786 g>mL and the density of methanol 1CH3OH2 is 0.791…

A:

Q: what is the molality of a solution in which 55g pf sucrose are dissolved in 950 mL of water?

A: Molarity is the ratio of moles of substance to a kilogram of the solvent. Molality(m)=Moles of…

Q: Calculate the molality of a solution that is prepared by mixing 25.5 mL of CH 3OH (d = 0.792 g/mL)…

A:

Q: A solution was prepared by dissolving 11.0 g of compound in 270.0 g of ethanol raising the boiling…

A:

Q: A solution of 0.890 g of an organic compound in 100.0 g of benzene has a freezing point of 5.107°C.…

A: Freezing point of pure solvent = 5.500°C  Freezing point of solution = 5.107°C  ∆ Tf = Freezing…

Q: A solution made by dissolving 150.0 g of an unknown compound in 375.0 mL of benzene to make a…

A: The question is based on the concept of solutions. depression in freezing point is a colligative…

Q: What is the molality of a CuSO4 solution where 5.00 g CuSO4 are dissolved in 50.0 g water?

A: Solution is made up of two components which are solute and solvent. Solute is present in the minor…

Q: A solution made by dissolving 150.0 g of an unknown compound in 425.0 mL of benzene to make a…

A: The molality of the solution is to be calculated The moles of the unknown compound was dissolved in…

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.