Chemistry Chemistry Practice Problems Solutions Library

Mole Fraction Solutions Library

Access 66 Mole Fraction video and text solutions to help you complete your homework. Need to revisit the concept? Watch our Mole Fraction learn videos.

Browse Solutions

66 solutions

Mole Fraction

Q. A solution is made containing 12.6 g of methanol CH 3OH (32.04 g/mol) in 154 g of water. H20 (18.02 g/mol)a) Calculate the mole fraction of methano...

Solved • Jan 20, 2020

Mole Fraction

Q. What is the mole fraction of CH3OH in an aqueous solution that is 12.0 m in CH3OH?A. 0.333B. 0.667C. 0.178D. 0.216 E. 0.400

Solved • Dec 20, 2019

Mole Fraction

Q. Which concentration unit does not require a measured amount (volume or mass) of solvent?A. mass percent of solute B. molalityC. mole fraction of so...

Solved • Dec 20, 2019

Mole Fraction

Q. In the flask diagrammed below, the left bulb contains 3.0L of neon at a pressure of 2.0 atm. The right bulb contains 2.0L of argon at a pressure of...

Solved • Oct 18, 2019

Mole Fraction

Q. The solubility of oxygen gas in water at 40 oC is 1.0 mmol/L of solution. What is this concentration in units of mole fraction?

Solved • Dec 3, 2018

Mole Fraction

Q. Caffeine (C8H10N4O2) is a stimulant found in coffee and tea. A solution of caffeine in the solvent chloroform (CHCl3) has a concentration of 0.0510...

Solved • Dec 3, 2018

Mole Fraction

Q. The density of toluene (C7H8) is 0.867 g/mL, and the density of thiophene (C4H4S) is 1.065 g/mL. A solution is made by dissolving 8.60 g of thiophe...

Solved • Dec 3, 2018

Mole Fraction

Q. Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 81.5 g of ascorbic acid dissolved in 220 g of water has a densi...

Solved • Dec 3, 2018

Mole Fraction

Q. A solution is made containing 14.6 g of CH3OH in 185 g H2O.Calculate the mole fraction of CH3OH.

Solved • Dec 3, 2018

Mole Fraction

Q. Find the mass of urea (CH4N2O) needed to prepare 50.1 g of a solution in water in which the mole fraction of urea is 7.66×10−2.

Solved • Dec 3, 2018

Mole Fraction

Q. A solution is prepared by dissolving 20.2 mL of methanol (CH3OH) in 100.0 mL of water at 25 oC. The final volume of the solution is 118 mL. The den...

Solved • Dec 3, 2018

Mole Fraction

Q. An aqueous solution contains 32% HCl by mass.Calculate mole fraction of the solution.

Solved • Dec 3, 2018

Mole Fraction

Q. Methanol (CH3OH) and ethanol (C2H5OH) are miscible because the major intermolecular force for each is H bonding. In some methanol-ethanol solutions...

Solved • Oct 30, 2018

Mole Fraction

Q. Water treatment plants commonly use chlorination to destroy bacteria. A byproduct is chloroform (CHCl3), a suspected carcinogen, produced when HOCl...

Solved • Oct 30, 2018

Mole Fraction

Q. Calculate the molality, molarity, and mole fraction of FeCl3 in a 28.8 mass % aqueous solution (d = 1.280 g/mL).

Solved • Oct 30, 2018

Mole Fraction

Q. Calculate the mole fractions of methanol, CH3OH; ethanol, C2H5OH; and water in a solution that is 40% methanol, 40% ethanol, and 20% water by mass....

Solved • Oct 29, 2018

Mole Fraction

Q. Calculate the mole fraction of each solute and solvent:(c) 25 g of Cl2 in 125 g of dichloromethane, CH2Cl2

Solved • Oct 29, 2018

Mole Fraction

Q. Calculate the mole fraction of each solute and solvent:(c) 46.85 g of codeine, C18H21NO3, in 125.5 g of ethanol, C2H5OH

Solved • Oct 29, 2018

Mole Fraction

Q. What are the mole fractions of HNO3 and water in a concentrated solution of nitric acid (68.0% HNO3 by mass)?(a) Outline the steps necessary to ans...

Solved • Oct 29, 2018

Mole Fraction

Q. What are the mole fractions of H3PO4 and water in a solution of 14.5 g of H3PO4 in 125 g of water?(a) Outline the steps necessary to answer the que...

Solved • Oct 29, 2018

Mole Fraction

Q. Calculate the molarity and mole fraction of acetone in a 1.00 m solution of acetone (CH3COCH3) in ethanol (C 2H5OH). (Density of acetone = 0.788 g/...

Solved • Oct 29, 2018

Mole Fraction

Q. Common commercial acids and bases are aqueous solutions with the following properties:Calculate the molarity, molality, and mole fraction of each o...

Solved • Oct 29, 2018

Mole Fraction

Q. The normal boiling point of methanol is 64.7˚C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 556.0 torr...

Solved • Oct 29, 2018

Mole Fraction

Q. Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25°C the vapor pressures of pentane and hexane are 511 and 150. torr, respectively. A...

Solved • Oct 29, 2018

Mole Fraction

Q. A solution is prepared by dissolving 52.3 g cesium chloride in 60.0 g water. The volume of the solution is 63.3 mL. Calculate the mass percent, mol...

Solved • Oct 29, 2018

Mole Fraction

Q. The normal boiling point of diethyl ether is 34.5°C. A solution containing a nonvolatile solute dissolved in diethyl ether has a vapor pressure of ...

Solved • Oct 29, 2018

Mole Fraction

Q. A 1.37-M solution of citric acid (H3C6H5O7) in water has a density of 1.10 g/cm3. Calculate the mass percent, molality, mole fraction, and normalit...

Solved • Oct 29, 2018

Mole Fraction

Q. A solution is prepared by mixing 50.0 mL toluene (C6H5CH3, d = 0.867 g/cm3) with 125 mL benzene (C6H6, d = 0.874 g/cm3). Assuming that the volumes ...

Solved • Oct 29, 2018

Mole Fraction

Q. A solution is prepared by mixing 25 mL pentane (C5H12, d = 0.63 g/cm3) with 45 mL hexane (C6H14, d = 0.66 g/cm3). Assuming that the volumes add on ...

Solved • Oct 29, 2018

Mole Fraction

Q. In lab you need to prepare at least 100 mL of each of the following solutions. Explain how you would proceed using the given information. d. 0.10 m...

Solved • Oct 29, 2018

Mole Fraction

Q. Common commercial acids and bases are aqueous solutions with the following properties:Calculate the molarity, molality, and mole fraction of each o...

Solved • Oct 29, 2018

Mole Fraction

Q. A solution of phosphoric acid was made by dissolving 10.0 g H 3PO4 in 100.0 mL water. The resulting volume was 104 mL. Calculate the density, mole ...

Solved • Oct 29, 2018

Mole Fraction

Q. An aqueous solution contains 56% NaCl by mass.Part ACalculate the molality of the solution. Express your answer using two significant figures. Part...

Solved • Oct 24, 2018

Mole Fraction

Q. What is the mole fraction of O2 in this mixture? 12.3 g of CO2 and 38.2 g of O2.

Solved • Oct 4, 2018

Mole Fraction

Q. A solation is prepared by dissolving 15.0 g of NH3, in 250.0 g of water. The density of the resulting solution is 0.974 g/mL. The mole fraction of ...

Solved • Oct 1, 2018

Mole Fraction

Q. A 5.00 L tank at 30.7°C is filled with 15.2 g of boron trifluoride gas and 10.4 g of sulfur hexafluoride gas. You can assume both gases behave as i...

Solved • Sep 7, 2018

Mole Fraction

Q. A solution is made by mixing 141. g of heptane (C7H16) and 121. g of chloroform (CHCl3) Calculate the mole fraction of heptane in this solution. Ro...

Solved • Jul 30, 2018

Mole Fraction

Q. In a mixture of argon and hydrogen, occupying a volume of 1.66 L at 910.0 mmHg and 54.9°C, it is found that the total mass of the sample is 1.13 g....

Solved • Jul 17, 2018

Mole Fraction

Q. What is the mole fraction of lead(II) nitrate in an aqueous solution prepared by dissolving 25.4 g of the solute in 150 0 mL of water at 22°C? The ...

Solved • Jul 16, 2018

Mole Fraction

Q. A 10.00 L tank at 0.8 degree C is filled with 16.8 g of dinitrogen difluoride gas and 13.2 g of sulfur hexafluoride gas. You can assume both gases ...

Solved • Jun 26, 2018

Mole Fraction

Q. A solution is made by mixing 109. g of acetyl bromide (CH3COBr) and 70. g of thiophene (C4H4S). Calculate the mole fraction of acetyl bromide in th...

Solved • Jun 25, 2018

Mole Fraction

Q. What is the mole fraction of oxygen gas in air (see the table on the left)?

Solved • Jun 12, 2018

Mole Fraction

Q. A gaseous mixture contains 406.0 Torr of H2(g), 347.9 Torr of N2 (g), and 83.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gase...

Solved • Jun 4, 2018

Mole Fraction

Q. A gas mixture contains 0.60 mol of N2, 0.40 mol of H2, and 0.25 mol of CH4. What is the mole fraction of H2 in the mixture?

Solved • Jun 4, 2018

Mole Fraction

Q. A solution is prepared by dissolving 28.4 g of glucose (C 6H12O6) in 355 g of water . The final volume of the solution is 378 mL. For this solution...

Solved • Mar 28, 2018

Mole Fraction

Q. A solution was prepared by dissolving 39.0 g of KCl in 225 mL of water. Calculate the mole fraction of the ionic species KCl in the solution. Expre...

Solved • Mar 26, 2018

Mole Fraction

Q. A solution is made by mixing equal masses of methanol, CH 4O, and ethanol, C2H6O.Determine the mole fraction of each component to at least three si...

Solved • Mar 23, 2018

Mole Fraction

Q. A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water.  Determine the mole fraction of sucrose if the final volume of t...

Solved • Mar 23, 2018

Mole Fraction

Q. In a 66.0-g aqueous solution of methanol, CH 4O, the mole fraction of methanol is 0.120. What is the mass of each component?a) Mass of CH4Ob) Mass ...

Solved • Dec 18, 2017

Mole Fraction

Q. A concentrated solution of glucose (C6H12O6) in water 75.3 % glucose by mass. Calculate the mole fraction and the molarity of glucose solution. (Th...

Solved • May 2, 2017

Mole Fraction

Q. What is the mole fraction of methanol, CH 3OH, if 55.18 g of methanol are added to 208.00 g of water?A. 0.633B. 0.130C. 8.277D. 0.149E. 0.321

Solved • Apr 26, 2017

Mole Fraction

Q. What is the mole fraction of Ethanol in a solution composed of 10 g Ethanol (C  2H6O), 10 g H2O, & 10 g CH3OH? A) 0.217B) 0.201C) 0.33D) 0.289E...

Solved • Nov 15, 2016

Mole Fraction

Q. Calculate the mole fraction of total ions in an aqueous solution prepared by dissolving 0.400 moles of MgCl2 in 850.0 g of water.A. 0.00841B. 0.027...

Solved • Aug 24, 2016

Mole Fraction

Q. What is the mole fraction of ethanol, C 2H5OH, if 42.52 g of ethanol is added to 125.00 g of water?a. 0.480 b. 7.382c. 0.133d. 0.117e. 0.465

Solved • Aug 24, 2016

Mole Fraction

Q. Determine the mole fraction of glucose, C6H12O6, (molecular weight 180.18) in a 1.86 M aqueous glucose solution given the density of the glucose so...

Solved • Aug 24, 2016

Mole Fraction

Q. A solution of sodium methoxide, NaOCH 3, in water has a mole fraction of 0.1750. What is the molality?

Solved • Jul 7, 2016

Mole Fraction

Q. What does each of the following statements mean? a.) 1.80 M NaCl    b.) 39 percent by mass HBr   c.) CO2 has a mole fraction of 0.310 in aqueous so...

Solved • Jul 7, 2016

Mole Fraction

Q. Which of the following chemical terms is affected by temperature? MolalityMass percentMolarityMole fraction

Solved • Jul 7, 2016

Mole Fraction

Q. What is the mole fraction of water in 200 g of 95% (by mass) ethanol, C 2H5OH?Formula Molar Mass of C2H5OH is 46 g•mol –1.a) 0.050b) 0.12c) 0.56d) ...

Solved • Apr 26, 2016

Mole Fraction

Q. A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water.  Determine the mole fraction of sucrose if the final volume of t...

Solved • Apr 11, 2016

Mole Fraction

Q. A solution is made by mixing equal masses of methanol CH 4O (MW = 32.01 g/mol) and ethanol C2H6O (MW = 46.02 g/mol). Determine the mole fraction of...

Solved • Apr 7, 2016

Mole Fraction

Q. What is the mole fraction of NaCl in a solution that contains 40.0 g NaCl and 60.0 g H2O?a) none of the given answersb) 3.33c) 0.205d) 0.170e) 0.300

Solved • Mar 14, 2016

Mole Fraction

Q. The molecular formula of Vitamin E (tocopherol) is C29H50O2 (MW = 430.71). If the mole fraction of vitamin E in a methyl alcohol (CH3OH) solution i...

Solved • Mar 9, 2016

Mole Fraction

Q. If the mass of sodium chloride, NaCl (MW= 58.5 g/mol), is 40.0 g and the mass of water is 30.0 g, what is the mole fraction of NaCl in the solution...

Solved • Mar 9, 2016

Mole Fraction

Q. If the mass of sodium chloride, NaCl (MW = 58.5 g/mol), is 40.0 g and the mass of water is 30.0 g, what is the mole fraction of NaCl in the solutio...

Solved • Feb 19, 2016

Mole Fraction

Q. The molecular formula of Vitamin E (tocopherol is C29H50O2 (MW = 420.71). If the mole fraction of vitamin E in a methyl alcohol (CH3OH) solution is...

Solved • Feb 19, 2016