A 0.520 g sample of an unknown nonelectrolyte compound is dissolved in 4.71 g of lauric acid (Kf = 3.90 °C/m). The freezing point depression is determine to be 4.20 °C. What is the molar mass of the compound?

Q: Calculate the freezing point depression expected for 0.0711 m aqueous solution of Na2S04. If this…

A: Depression in freezing point: It is the ratio of observed freezing point to the calculated freezing…

Q: Calculate the freezing point of a solution made by dissolving 1.00 mole of NaCl in 1000. g of H2O.

A: We will use formula of ∆Tf. ∆Tf=Tf°-Tf

Q: Suppose that you add 24.3 g of an unknown molecular compound to 0.250 kg of benzene, which has a…

A: Given, mass of unknown molecular compound=24.3gm mass of benzene=0.250 Kg Kf of Benzene=5.12°C/m…

Q: 14).  part A: The freezing point of a solution prepared by dissolving 147.3 mg of caffeine in 10.0…

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

Q: An aqueous solution contains 20% by mass MgCl2 (MW=95.21 g/mole), if the density is 1.25 g/ml, what…

A: Given data contains, Density = 1.25 g/mL  % by mass = 20%  Kf = 1.86 K/m

Q: Calculate the vapor pressure lowering of a solution of 2.00 g of aspirin (M = 180.15 g/mol) in 50.0…

A: Moles of solute (aspirin) = given massmolar mass=2.00180.15=0.0111 mol  Moles of solvent ( methanol)…

Q: Calculate the mole fraction and molality of a solution that contains 0.850 g of ammonia, NH 3,…

A: Given that: Mass of ammonia = 0.850g  Mass of water = 125g  We know : Molar mass of NH3 = 17g/mol…

Q: What is the molar mass of glycerol if a solution of 5ml glycerol in 25ml of water resulted in a…

A:

Q: An aqueous solution containing 36.8 g of an unknown molecular (non-electrolyte) compound in 143.2 g…

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

Q: Calculate the freezing point of a solution containing 0.600 kg of CHCl3 and 42.0 g of eucalyptol

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

Q: A 0.95 m aqueous solution of an ionic compound with the formula MX has a freezing point of -3.0 °C.…

A:

Q: When 20 g of naphthoic acid (C,H,O.) is dissolved in 50 g of benzene (Kf = 1.72 K kg/mol), a…

A: Given : Mass of solute(naphthoic acid) = 20g = 0.02 kg Mass of solvent( benzene) = 50g = 0.05 kg…

Q: How many grams of KNO, (101.10g mol ") must be added to 102 g water to produce a boiling point…

A: Each solution possesses particular boiling point and also freezing point. The increment/elevation in…

Q: A solution prepared by dissolving 79 mg of an unknown protein in 3.3 g of camphor has a freezing…

A: Freezing-point depression is the decrease of the freezing point of a solvent on the addition of a…

Q: How many grams of pyrazine (C4H4N2) would have to be dissolved in 1.50 kg of carbon tetrachloride to…

A: Colligative properties: The colligative properties are those properties of solutions that depend on…

Q: The boiling point of a methanolic solution of the non-electrolyte, acetamide (CH;CONH;) is 66.9 °C.…

A: According to Raoult's Law ΔTbf = i * Kb* m  m = molality of the solution Kb = Boiling point constant

Q: When 2.06 g of a certain molecular compound X are dissolved in 90. g of benzene (CH), the freezing…

A: mass of solute = 2.06 g mass of solvent = 90.0 g Solvent = benzene Freezing point = 3.5 oC

Q: What mass of glucose (molar mass 180.16 g/moles i=1) must be dissolved in 2.50 kg of solvent to…

A: The number of moles of a substance is given as the mass of the substance upon its molar mass. The…

Q: A solution is prepared by dissolving 0.131 g of an ionic compound in 25.4 g of water. The ionic…

A: Here, the molality of the solution is given as 0.056 m. The molality indicates, moles of solute…

Q: Safrole is contained in oil of sassafras and was once used to flavor root beer. An 8.50 g sample of…

A: Given: 8.50 g of safrole was dissolved in 365.8 g diphenyl ether. Kf for diphenyl ether is…

Q: A solution consisting of 0.278 mol of methylbenzene, C6H5CH3, in 244 g of nitrobenzene, C6H5NO2,…

A:

Q: Calculate the freezing point of a solution prepared by dissolving 3.17 g Ca(ClO3)2 in 452.6 g H2O.

A: When a solute added to solvent it's freezing point decrease

Q: Calculate the freezing point of a solution containing 50.0g of NaCl in 5000mL of water, Kf for water…

A: Given data: *Kf of water is 1.86 degrees C/m.  The freezing point is calculated by using the…

Q: Calculate the mass of NaCl (molar mass = 58.5 g mol-1) to be dissolved in 37.2 g of water to lower…

A: To calculate:  the mass of NaCl to be dissolved in 37.2 g of water to lower the freezing point by…

Q: If the freezing point depression of a 0.110 m solution is 2.33 degrees Celsius, what is the freezing…

A:

Q: When 168 mg of a certain molecular compound X are dissolved in 25.0 g of cyclohexane, the freezing…

A: Solution -

Q: Adding 1g of benzene, C,H6, to 70g cyclohexane, C,H12, lowers the freezing point of the cyclohexane…

A:

Q: Cyclohexanol, C H,,OH, is sometimes used as the solvent in molecular weight determinations by…

A: Weight of benzoic acid = 0.253 gWeight of cyclohexanol = 12.45g = 0.01245 kgLowering in temperature…

Q: Given the following mixture of two compounds 45.00 mL of X (MW =90.00 g/mol)(density 0.809 g/mL) and…

A: In order to calculate the new freezing point of the solution we first write down the given data:…

Q: Determine the freezing point depression of a solution that contains 26.8 g of glycerin (C3H8O3,…

A:

Q: Calculate the molecular weight of the solute in a solution containing 2.47 g of a non-volatile…

A:

Q: Calculate the molality of the solution formed when 1.5g of urea (molar mass = 60g / mol) is…

A: Given, 1.5g of urea (molar mass = 60g / mol) is dissolved in 200g of benzene

Q: You are a forensic chemist and vou are given a white powder to analyze. You take a 0.25- g sample of…

A: Given that 0.25 g of a sample is dissolved in 4.0 g of a benzene.Freezing point of the solution is…

Q: Calculate the molar mass of naphthalene, the organic compound in mothballs, if a solution prepared…

A: Given, The molar mass of naphthalene, the organic compound in mothballs, if a solution prepared by…

Q: Mercury(II) chloride (HgCl2) freezes at 276.1°C and has afreezing-point depression constant Kf of…

A: The solute present is HgCl and the solvent present is HgCl2. Freezing point of HgCl2 is 276.1°C =…

Q: A compound containing only boron, nitrogen, and hydrogen was found to be 40.3% B, 52.2% N, and 7.5%…

A: NOTE : the constant given 5.12 °C m¯1 is Kf of benzene and not Kb Since the depression in freezing…

Q: Lauryl alcohol is obtained from coconut oil and is used to make detergents. A solution containin…

A:

Q: (а) The boiling point of a methanolic solution of the non-electrolyte, acetamide (CH3CONH2) is 66.9…

A: The question is based on the concept of solution   Molality is a method of expressing concentration…

Q: A solution of 1.25 g of a certain non-electrolyte in 20 g of water freezes at 271.95 K. Calculate…

A:

Q: 2. A student was required to make a solution of camphor and naphthalene that had a freezing point of…

A: Freezing point is a colligative property, meaning it depends upon the amount of solute or ion…

Q: Which of the following aqueous solutions should have the lowest freezing point: 0.0500m C6H12O6,…

A: Depression in freezing point is defined as the depression in freezing point of water on addition  of…

Q: What mass of naphthalene must be dissolved in 2.20 ×102 g of benzene to give a solution with a…

A: The required relationship is given below.

Q: Calculate the molarity of a solution that contains 126.8 g NaCl in 2.800 L of water.

A: Since you have posted multiple questions, we are entitled to answer the first only. Please repost…

Q: An aqueous solution containing 35.9 g of an unknown molecular (nonelectrolyte) compound in 150.0 g…

A:

Q: What mass, in grams, of NaCl needs to be added to 1.7 kg of water in order to create a solution with…

A:

Q: 0.930-g sample of ascorbic acid (vitamin C) was dissolved in 95.0 g of water. The concentration of…

A:

Q: Two grams of benzoic acid dissolved in 25 g of benzene, K = 4.90 K kg/mol, produce a freezing point…

A:

Q: An aqueous solution containing 54.6 g of an unknown molecular (nonelectrolyte) compound in 150.0 g…

A: Here we are given 54.6 g of the nonelectrolyte solute that is dissolved in 150.0 g of solvent,…