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Molality Solutions Library

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100 solutions

Molality

Q. A 2.950×10−2M solution of NaCl in water is at 20.0°C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume u...

Solved • Mar 20, 2020

Molality

Q. What is the molality of a solution of 18% by mass cadmium sulfate, CdSO4 (molar mass = 208.46 g/mol) by mass?A) 0.53 mB) 0.44 mC) 0.86 mD) 2.10 mE)...

Solved • Feb 4, 2020

Molality

Q. How many grams of Na 2SO4 (142.05 g/mol) should be added to 175 mL of water to prepare a 0.555 m solution of Na 2SO4? Assume the density of water i...

Solved • Jan 20, 2020

Molality

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)c) Calculate the molality of methanol:a. ...

Solved • Jan 20, 2020

Molality

Q. Determine the molality of a solution prepared by dissolving 7.16 g of potassium chlorate in 66.6 g of water. Give your answer to 2 decimal places.

Solved • Dec 16, 2019

Molality

Q. Which of the following represents the mass percent of H2SO4 (MM = 98) in a 2.00 m aqueous H2SO4 solution?

Solved • Dec 16, 2019

Molality

Q. Determine the molality of a solution prepared by dissolving 10.66 g of potassium chlorate in 74.9 g of water. Give your answer to 2 decimal places....

Solved • Dec 12, 2019

Molality

Q. Determine the mass in grams of glucose (180.1 g/mol) that must be added to 63 g of water to make a 2.47 m solution.  Give your answer to 2 decimal ...

Solved • Dec 11, 2019

Molality

Q. Determine the molality of a solution prepared by dissolving 9.52 g of heptane (C7H16) (100.2 g/mol) in 87 g of benzene (C6H6). Give your answer to ...

Solved • Nov 1, 2019

Molality

Q. Calculate the molality of a 6.35 M aqueous methanol (CH3OH) solution with a density of 0.953 g/mL.A. 7.28 mB. 6.99 mC. 5.87 mD. 8.47 m

Solved • Aug 31, 2019

Molality

Q. HCl density 1.19 g/cm3 and 37% solute by mass. Calculate the molality. Please explain step by step.

Solved • Jul 9, 2019

Molality

Q. Fluorocarbons (compounds that contain both carbon and fluorine) were, until recently, used as refrigerants. The compounds listed in the following t...

Solved • Dec 3, 2018

Molality

Q. Fluorocarbons (compounds that contain both carbon and fluorine) were, until recently, used as refrigerants. The compounds listed in the following t...

Solved • Dec 3, 2018

Molality

Q. Glucose makes up about 0.10% by mass of human blood.Calculate the molality.

Solved • Dec 3, 2018

Molality

Q. How many grams of sulfur (S8) must be dissolved in 100.0 g naphthalene (C10H8) to make a 0.13 m solution?

Solved • Dec 3, 2018

Molality

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

Molality

Q. If an aqueous solution is very dilute, will its molality be greater than its molarity, nearly the same as its molarity, or smaller than its molarity?

Solved • Dec 3, 2018

Molality

Q. Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of red brass consisting of 81.0% Cu and 19.0% Zn b...

Solved • Dec 3, 2018

Molality

Q. A solution is made containing 21.2 g phenol (C6H5OH) in 450 g ethanol (CH3 CH2OH).Calculate the molality of phenol.

Solved • Dec 3, 2018

Molality

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

Molality

Q. The density of acetonitrile (CH3 CN) is 0.786 g/mL, and the density of methanol (CH3 OH) is 0.791 g/mL. A solution is made by dissolving 23.0 mL CH...

Solved • Dec 3, 2018

Molality

Q. Calculate the number of moles of solute present in each of the following aqueous solutions.86.4 g of 0.180 m KCl,

Solved • Dec 3, 2018

Molality

Q. If you combine 25.1 g of a solute that has a molar mass of 25.1 g/mol with 100.0 g of a solvent, what is the molality of the resulting solution?

Solved • Dec 3, 2018

Molality

Q. What is the molality of a 10.6 % by mass glucose (C6H12O6) solution? (The density of the solution is 1.04 g/mL).

Solved • Dec 3, 2018

Molality

Q. An aqueous solution contains 4.6 % NaCl by mass. Calculate the molality of the solution.

Solved • Dec 3, 2018

Molality

Q. A solution contains 22.4 g glucose (C6H12O6) dissolved in 0.500 L of water. What is the molality of the solution? (Assume a density of 1.00 g/mL fo...

Solved • Dec 3, 2018

Molality

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

Solved • Dec 3, 2018

Molality

Q. How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?126 g of 0.505 m KCl

Solved • Dec 3, 2018

Molality

Q. How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent?126 g of 0.220 m NaNO3

Solved • Dec 3, 2018

Molality

Q. An aqueous NaCl solution is made using 126 g of NaCl diluted to a total solution volume of 1.15 L .Calculate the molality of the solution. (Assume ...

Solved • Dec 3, 2018

Molality

Q. An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (d = 1.114 g/mL; ℳ = 62.07 g/mol) and water (d = 1.00 g/mL) at ...

Solved • Oct 30, 2018

Molality

Q. Calculate the molality of the following: (a) A solution containing 85.4 g of glycine (NH2CH2COOH) dissolved in 1.270 kg of H2O

Solved • Oct 30, 2018

Molality

Q. A 13.0% solution of K2CO3 by mass has a density of 1.09 g/cm3. Calculate the molality of the solution.

Solved • Oct 29, 2018

Molality

Q. The concentration of glucose, C6H12O6, in normal spinal fluid is 75 mg/100 g . What is the molality of the solution?

Solved • Oct 29, 2018

Molality

Q. Calculate the molality of each of the following solutions:(b) 125 g of NH4NO3 in 275 g of water—a mixture used to make an instant ice pack

Solved • Oct 29, 2018

Molality

Q. Calculate the molality of each of the following solutions:(b) 0.86 g of NaCl in 1.00 × 102 g of water—a solution of sodium chloride for intravenous...

Solved • Oct 29, 2018

Molality

Q. Calculate the molality of each of the following solutions:(a) 583 g of H2SO4 in 1.50 kg of water—the acid solution used in an automobile battery

Solved • Oct 29, 2018

Molality

Q. What is the molality of phosphoric acid, H3PO4, in a solution of 14.5 g of H3PO4 in 125 g of water?(a) Outline the steps necessary to answer the qu...

Solved • Oct 29, 2018

Molality

Q. The term proof is defined as twice the percent by volume of pure ethanol in solution. Thus, a solution that is 95% (by volume) ethanol is 190 proof...

Solved • Oct 29, 2018

Molality

Q. What is the mole fraction, X, of solute and the molality, m (or b), for an aqueous solution that is 100% NaOH by mass? 

Solved • Oct 2, 2018

Molality

Q. Question 3 What is the molality of 3.04 g of sodium nitrate in 12.19 g water? The molar mass of sodium nitrate is 84.99 g/mol. (Enter only the nume...

Solved • Oct 2, 2018

Molality

Q. Calculate the molality of a solution formed by dissolving 27.8 g of Lil in 500 0 mL of water.(i) 0.254 m (ii) 0.241 m (iii) 0.556 m (iv) 0.394 m (v...

Solved • Oct 1, 2018

Molality

Q. A solution is 0.0433 m LiF. What is the molarity of the solution if the density is 1.10 g/mL? (i) 0.0390 M (ii) 0.0476 M (iii) 0.0519 M (iv) 0.0417...

Solved • Oct 1, 2018

Molality

Q. An aqueous solution of barium nitrate has a concentration of 5.84 x 10-2 molal. The percent by mass of barium nitrate in the solution is __________...

Solved • Sep 26, 2018

Molality

Q. The density of a 4.500% by mass aqueous solution of potassium sulfate, K2SO4, is 1.0370 g/mL. The molar mass of potassium sulfate is 174.3 g/mol. A...

Solved • Sep 26, 2018

Molality

Q. Be sure to answer all parts.Calculate the molality of each of the following aqueous solutions. (a) 2.95 M NaCl solution (density of solution = 1.08...

Solved • Sep 13, 2018

Molality

Q. A concentrated aqueous solution of sulfuric acid (H2SO4) has a density of 1.509 g/mL and contains 61% sulfuric acid by mass. Calculate the molality...

Solved • Sep 12, 2018

Molality

Q. Concentrated aqueous sodium hydroxide, NaOH(aq), is sold commercially as a 14.30 M solution with a density of 1.430 g/mL. What is the concentration...

Solved • Sep 11, 2018

Molality

Q. Be sure to answer all parts. Calculate the molality of each of the following solutions: (a) 19.1 g of sucrose (C12H22O11) in 745 g of water, (b) 8....

Solved • Sep 5, 2018

Molality

Q. 520 g of CaCO3 is dissolved in 5 kg of water. What is the molality of the solution?• 26 m• 1.04 m• 104 m

Solved • Sep 5, 2018

Molality

Q. What is the mole fraction, X, of solute and the molality, m (or b), for an aqueous solution that is 11.0% NaOH by mass?

Solved • Aug 21, 2018

Molality

Q. 8.90 g of NH4Cl is added to 17.4 g of water. Calculate the molality of the solution. 

Solved • Aug 9, 2018

Molality

Q. Be sure to answer all parts.Calculate the molality of each of the following solutions:(a) 25.7 g of sucrose (C12H22O11) in 717 g of water, (b) 6.57...

Solved • Aug 7, 2018

Molality

Q. Enter your answer in the provided box.Determine the molality of an aqueous solution that is 12.0 percent urea by mass.

Solved • Aug 7, 2018

Molality

Q. Be sure to answer all parts.Calculate the molality of each of the following aqueous solutions. (a) 2.30 M NaCl solution (density of solution = 1.08...

Solved • Aug 7, 2018

Molality

Q. What is the molality of a solution that has been prepared by mixing 50.0 g of sodium chloride with 500 g of water? a. 1.14 m b. 1.21m c. 1.48 m d. ...

Solved • Jul 30, 2018

Molality

Q. Your lab partner combined chloroform (CHCl3) and acetone (C3H6O) to create a solution where the mole fraction of chloroform, Xchloroform is 0.187. ...

Solved • Jul 11, 2018

Molality

Q. Calculate the osmolarity of a solution prepared by dissolving 6.53 grams of NiCl2 (M.W. = 129.6 g/mole) in water to give 250.0 mL of solution. 

Solved • Jul 2, 2018

Molality

Q. What is the molality of the solution when 49.0 g H 2SO4 is dissolved in 150 g of water?

Solved • Jun 25, 2018

Molality

Q. Calculate the molality of each of the following aqueous solutions. (a) 1.85 M NaCl solution (density of solution = 1.08 g/mL): (b) 37.5 percent by ...

Solved • Jun 19, 2018

Molality

Q. Lauryl alcohol, C12H25OH, is prepared from coconut oil. It is used to make sodium lauryl sulfate, a synthetic detergent. What is the molality of la...

Solved • Jun 19, 2018

Molality

Q. The density of a 20.3 M CH 3OH (methanol) solution is 0.858 g/mL. What is the molality of this solution? H2O is the solvent. a) 20.8 m b) 97.8 m c)...

Solved • May 29, 2018

Molality

Q. Calculate the molality of each of the following solutions:a. 0.700 mol of glucose in 1.50 kg of waterb. 29.5 mmol of acetic acid in 65.0 g of water...

Solved • May 4, 2018

Molality

Q. A solution was prepared by dissolving 39.0 g of KCl in 225 mL of water.  Calculate the molality of KCl in the solution.

Solved • Mar 26, 2018

Molality

Q. How many moles of KF are contained in 244 mL of 0.135 m KF solution?  The density of the solution is 1.22 g/mL

Solved • Mar 23, 2018

Molality

Q. What mass (in g) of NH3 must be dissolved in 475 g of methanol to make a 0.250 m solution?

Solved • Mar 23, 2018

Molality

Q. What mass (in g) of NH3 must be dissolved in 475g of methanol to make a 0.250 m solution?

Solved • Mar 23, 2018

Molality

Q. What is the molality of naphthalene (C10H8) when 10.5 g of the compound are dissolved in 325 g of benzene (C6H6)? A. 0.252 m  B. 0.0819 m  C. 13...

Solved • Aug 9, 2017

Molality

Q. What is the molality of a 32.0% by weight aqueous solution of acetone (C  3H6O)?A. 8.10B. 7.80C. 7.12D. 6.56E. 5.74

Solved • Jul 25, 2017

Molality

Q. Which of the following statements is FALSE?a) The minority component of a mixture is called the soluteb) The majority component of a mixture is cal...

Solved • Jul 3, 2017

Molality

Q. 30 grams of liquid ethanol, CH3CH2OH, are mixed with 70 g water. The density of pure ethanol is 0.789 g/mL. The density of water is 1 g/mL. What is...

Solved • Jun 30, 2017

Molality

Q. How many grams of glucose (C6H12O6) must be dissolved in 563 g of ethanol (C2H5OH) to prepare a 2.40 x 10 -2 m solution?A. 2.43 g C6H12O6B. 4.32 g ...

Solved • Apr 25, 2017

Molality

Q. Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H 2 O.A) 0.122 mB) 0.454 mC) 0.220 mD) 0....

Solved • Mar 6, 2017

Molality

Q. Calculate the molality of a 23.0% by mass acetic acid, HC 2H3O2, solution. (molar mass = 60.05 g/mole)

Solved • Jan 19, 2017

Molality

Q. A solution of ethanol, C2H6O, is prepared by dissolving 14.0 g C2H6O in 100.0 g water. (Molar mass ethanol = 46.07 g/mole) Find the molality of the...

Solved • Jan 19, 2017

Molality

Q. Ethylene glycol (C2H6O2) is a common automobile antifreeze, dissolving in water to make a nonelectrolytic solution. A certain ethylene glycol solu...

Solved • Dec 14, 2016

Molality

Q. Ethylene glycol (C2H6O2) is a common automobile antifreeze, dissolving in water to make a nonelectrolytic solution. A certain ethylene glycol solu...

Solved • Dec 14, 2016

Molality

Q. What is the molality of a solution made by dissolving 38 g of C 10H8 in 425 g of C7H8? a. 0.546 mb. 12.3 mc. 0.998 md. 4.65 me. 0.698 m 

Solved • Sep 23, 2016

Molality

Q. What mass (in g) of NH 3 must be dissolved in 475 g of methanol to make a 0.25 m solution? A) 2.02 g B) 4.94 g C) 1.19 g D) 8.42 g E) 1.90 g

Solved • Sep 16, 2016

Molality

Q. What is the molality of a 4.0 M NaOH solution? The density of the solution is 1.04 g/mL. In 1 L solution. a) 0.15 m b) 4.5 m c) 0.18 m d) 4.0 m e)...

Solved • Sep 14, 2016

Molality

Q. Calculate the molality of total ions in an aqueous solution prepared by dissolving 0.400 moles of magnesium chloride in 850.0 g of water.A. 0.47 x ...

Solved • Aug 24, 2016

Molality

Q. A solution of sucrose (C12H22O11 of MW 342 grams/mole) in benzene is 0.40 molal. The solution’s density is 0.90 grams/mL. How many milliliters of t...

Solved • Jul 28, 2016

Molality

Q. What is the total ionic molality in an aqueous solution prepared by dissolving 0.200 moles of aluminum perchlorate, Al(ClO4)3 in 900.0 g water? 

Solved • Jul 7, 2016

Molality

Q. What mass of water is needed to dissolve 292.5 g of NaCl to produce a 0.25  m aqueous solution? Formula Molar Mass of NaCl is 58.5 g•mol –1. a) 2...

Solved • Apr 26, 2016

Molality

Q. What is the molality (m) of a 1.25 M aqueous solution of sugar (C 6H12O6, 342.3 g/mol) which has a density of 1.14 g/mL? a) 0.742 molal b) 1.25 m...

Solved • Apr 14, 2016

Molality

Q. Calculate the molality of a solution formed by dissolving 27.8 g of LiI in 500.0 mL of water. A) 0.394 m      B) 0.556 m      C) 0.241 m      D) 0...

Solved • Apr 11, 2016

Molality

Q. 3.52 g NH4Cl (MW = 53.45 g/mol) is added to 12.4 g of water. Calculate the molality of ammonium chloride in the solution.  a) 5. 31 m b) 0.0872 m...

Solved • Apr 7, 2016

Molality

Q. At 20°C, a 0.376 M aqueous solution of ammonium chloride (NH 4Cl) has a density of 1.0045 g/mL. What is the molality of NH4Cl in the solution?A. 0....

Solved • Mar 16, 2016

Molality

Q. A solution of 6.5% per weight H 2SO4 is dissolved in water. What is this concentration in molality? (Molar weight = 98 g/mol)   A. 2.3 m B. 0.71 ...

Solved • Mar 16, 2016

Molality

Q. An aqueous  solution is 2.67 M in HNO3 and has a density of 1.1064 g cm -3. Compute the molality of the HNO3 in this solution in mol/kg.a) 2.76b) 2...

Solved • Mar 14, 2016

Molality

Q. A 9.2 M perchloric acid (HClO 4) solution has a density of 1.54 g cm -3 at 25°C. Calculate the molality of the perchloric acid.a) 5.97b) 14.2c) 10....

Solved • Mar 11, 2016

Molality

Q. An aqueous solution is 2.67 M in HNO 3 and has a  density of 1.1064 g cm -3 . Compute the molality of the HNO3 in this solution in mol/kg.a) 2.42b)...

Solved • Mar 10, 2016

Molality

Q. What is the molality of an ascorbic acid solution made by dissolving 100.0 g of ascorbic acid, C6H8O6 (MW = 176.126 g/mol) in 750.0 g of water ( an...

Solved • Mar 10, 2016

Molality

Q. What is the molality of 150.0 g of NH 3 dissolved in a solution that is 1.25 Liters? The density of the solution is 1.45 g/mL. A. 4.86 B. 5.30 C...

Solved • Feb 19, 2016

Molality

Q. What is the molality of 150.0 g of NH 3 dissolved in a solution that is 1.25 Liters? The density of the solution is 1.45 g/mL. A. 4.86 B. 5.30 C...

Solved • Feb 19, 2016

Molality

Q. An aqueous solution is 2.67 M in HNO 3 and has a density of 1.1064 g cm –3. Compute the molality of the HNO3 in this solution in mol/kg. a. 2.41 ...

Solved • Feb 19, 2016

Molality

Q. What is the molality is an ascorbic acid solution made by dissolving 100.0 g of ascorbic acid, C6H8O6 (MW = 176.126 g/mol) in 750.0g of water (answ...

Solved • Feb 19, 2016

Molality

Q. Molality from weight percent: What is the molality of an 18.0% aqueous solution of KCl?

Solved • Feb 18, 2016

Molality

Q. How many grams of potassium nitrate (KNO3) do I need to dissolve in 800. g of water to prepare a 0.425 m KNO3 solution?

Solved • Feb 18, 2016

Molality

Q. What mass (in g) of NH­ 3 must be dissolved in 475 g of methanol to make a 0.250  m solution? a) 2.02 g   b) 4.94 g   c) 1.19 g   d) 8.42 g   ...

Solved • Feb 4, 2016