when 7.94 g of xylene was added to 132.5 g of cyclohexane, the freezing point of the solution was -4.9 C. what is the molar mass of xylene?

Q: what is the molality of a solution made 100.1 g of NaCl and 440.0 of water?

A: To calculate the molality of the solution , we would use formula of molality.

Q: Calculate the freezing point of a solution of 35.0 g methyl salicylate, C7H6O2, dissolved in 800. g…

A:

Q: The boiling point of chloroform CHC13 is 61.70°C at 1 atmosphere. A nonvolatile, nonelectrolyte that…

A: Given that : The boiling point of chloroform = 61.70°C The molar mass of chloroform = 180.1 g/mol…

Q: How many grams of ethylene glycol must be added to 1,000. g of water to form a solution that has a…

A: Given data mass of solvent (water) = 1000.0 g = 1.00 kg Freezing point of solution  = - 10 oC Solute…

Q: A solution contains 0.35 mol of isopropanol (C₃H₇OH) dis-solved in 0.85 mol of water. (a) What is…

A: INTRODUCTION: Mole fraction is defined as the number of moles of solute to the total mass of…

Q: How many grams of ethylene glycol (molar mass = 62.07 g/mol) must be added to 1500.0 g of water to…

A:

Q: A solution is prepared by dissolving in 3.00 g of naphthalene ( C10H8 ) in 20.0 g of benzene (…

A:

Q: 3. A solution of 0.85 g of an organic compound in 100.0 g of benzene has a freezing point of 5.16 °…

A: Formula  ∆Tf = i.Kf.m  5.16 = 1 x 5.12 x m m = 1.008 mol/kg  Here m is molality of solution.…

Q: A solution containing 10.0 g of an unknown liquid and 90.0 g water has a freezing point of -3.33 °C.…

A: When talking about colligative properties, the magnitude of the freezing point depression can be…

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

Q: . If 10.0 g of NaCl are dissolved in 75.0 mL of water, what will be the freezing point of the…

A:

Q: A student dissolves 0.180g of an unknown molecular solid in 50.0g of water and finds the freezing…

A: We will have to use the formula: ΔTf     =   i*m*Kf m = molality of solution  mass of solvent = 50 g…

Q: 14. What is the molecular mass of a substance if 22.5 g dissolved in 250 g of water produces a…

A: We are required to find the molar mass of the substance  Mass of substance taken=22.5 gm

Q: An aqueous solution containing 15.1 g of an unknown molecular (nonelectrolyte) compound in 108.5 g…

A: Given: The mass of an unknown compound and the mass of water is 15.1 g and 108.5 g, respectively.…

Q: An aqueous solution containing 17.5 g of an unknown molecular (nonelectrolyte) compound in 100.0 g…

A: Given information, mass of unknown molecular (nonelectrolyte) compound is 17.5 g mass of water is…

Q: What mass of ethylene glycol (molar mass = 62.0 g mol-1) must be added to 5.50 kg of water to lower…

A: The depression in freezing point can be determined as follows, Depression in freezing point ΔT = i x…

Q: A solution contains 22.5 g of methanol, CH3OH , dissolved in sufficient water to give a total mass…

A:

Q: 6. A 7.85-g sample of a compound with the empirical formula C5H4 is dissolved in 301 g of benzene.…

A:

Q: A 40.7g of a nonelectrolyte is dissolved in 220g of water to make a solution.  The solution’s…

A: The given data contains, mass of nonelectrolyte = 40.7 g. mass of water = 220 g. Temperature =…

Q: An aqueous solution of a nonionic (that is, nonelectrolyte) solute has a freezing point of -0.290…

A: Let the molar mass of the solute be x. The molality of the solution can be expressed as follows-

Q: When 116. mg of a certain molecular compound X are dissolved in 60.0 g of cyclohexane C6H12, the…

A:

Q: What is the freezing point when 12.70 g of urea (formula mass = 60.00 g/mol) is dissolved in 199.89…

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

Q: The vapor pressure of diethyl ether (molar mass, 74.12 g mol-1)at 30°C is 0.8517 atm. Suppose 1.800…

A: The vapor pressure of diethyl ether (molar mass, 74.12 g mol-1)at 30°C is 0.8517 atm.  vapor…

Q: Suppose that 98.0g of a nonelectrolye are dissolved in 1.0 kg of water. The freezing point of this…

A:

Q: #7 #8 6# C. What is the (a) molality, (b) freezing point, and (c) boiling point of a solution…

A: Given information: Mass of ethylene glycol = 100.0 g Mass of water = 150.0 g Mass of glucose = 55.8…

Q: The percent by mass of methanol (MM = 32.04 g/mol) in an aqueous solution is 92.9%. What is the…

A: 1) Percentage by mass=92.9% 2) Molecular weight of methanol (MM=32.04 g/mol)

Q: When 92.0 g of a compound is dissolved in 1000. g of water, the freezing point of the solution is…

A:

Q: The freezing point of water is 0.00°C at 1 atmosphere. How many grams of barium acetate (255.4…

A: The molality is particularly used to express certain solution's concentration in mol/kg unit. If…

Q: An aqueous solution of a nonionic (that is, nonelectrolyte) solute has a freezing point of -0.435…

A:

Q: A solution of hexane, C6H14, in benzene, C6H6, has a molality of 0.250 m. What mass of hexane is…

A:

Q: What is the osmotic pressure of a solution that contains 25.9 mg of glucose (180.156 g/mol) in 75.0…

A:

Q: What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 200.0 g water to give a…

A: As we know, ΔTf = Kf.m.iwhere:ΔTf = reduction of freezing from 0 degree celcius = 0 -(-3.60) = 3.60…

Q: 5. A solution contains 92.2g of methanol, CH3OH, dissolved in sufficient water to give a mass of…

A: First to calculate moles.  Then using density to calculate volume.  Then to calculate molarity.

Q: What is the freezing point of this solution? (The freezing point of 1 kg of water is lowered 1.86…

A: Colligative properties are dependent on the number of moles of solute in the solution. There are…

Q: When 7.47 g of a certain molecular compound X are dissolved in 40.0 g of cyclohexane (CH,,), the…

A:

Q: A compound of carbon, hydrogen, and oxygen was burned in oxygen, and 1.000 g of the compound…

A: Given, Mass of compound = 0.1107g. Mass of water = 25.0g = 0.025kg. Freezing point of solution =…

Q: 7.64 grams of unknown solute is added to 38.6 grams of water to produce a solution that freezes at…

A:

Q: A solution of 0.870 g of an organic compound in 100.0 g of benzene has a freezing point of 5.227°C.…

A: From given data Kf = 5.12°C/m Freezing point of solution T1  = 5.227 °C Freezing point of pure…

Q: Hydrochloric acid is usually obtained as a 36% hydrochloric acid solution. If it is 13.42 M, what is…

A: Since % by mass is given by  % by mass = mass of solute X 100 / Mass of solution  Assuming we have…

Q: If 4.50 moles of n-hexane (C6H14) are dissolved in 5.50 moles of n-pentane (C5H12) at 25°C, what is…

A: Moles of n-hexane = 4.50 Moles of n-pentane = 5.50 Temperature = 25°C = 298K The vapor pressures of…

Q: Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of…

A: DISSOCIATION: In chemistry, when a chemical compound is cleaved into its smaller constituents is…

Q: If the mass percent of an unknown is 5.6% when mixed in a solution of Benzene (C6116) and the new…

A:

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

A:

Q: Assume that each of the ions in calcium chloride, CaCl2, has the same effect on the freezing point…

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

Q: A 1.10 g sample of an unknown compound reduces the freezing point of 75.22 g benzene from 5.53 to…

A: Given: Mass of substance (solute) = 1.10 g mass of benzene (here solvent) = 75.22 g Initial…

Q: What weight of glycerol, C3H8O3 is needed to mix it with 2000g water to lower its freezing point hy…

A: Given : Mass of water (solvent) = 2000 g Change in temperature = 1°C

Q: solution

A: Given values- Weight of water (solvent)=1000gm=1kg Depression in freezing point =2.45°C   Molar mass…

Q: A 30.0 mL sample of this aqueous HX solution freezes at – 0.186 oC. What is the molar mass of HX?

A: Molality is a measure of number of moles of solute present in 1 kg of solvent.

Q: The Tf of camphor is 179.80°C and it’s kf is 39.7°C/m. When 200.0 mg of a compound (X) are added to…

A: Given Information-  Tf of camphor = 179.80oC kf = 39.7oC/m mass of compound (X) = 20.00 mg = =…