Caffeine C8H10N4O2 is stimulant found in tea and coffee. A sample of the substance was dissolved in 45.0 g if chloroform CHCl3 to give 9.78x10^-2m solution. How many grams of caffeine were in the sample

Q: 435 mL of a 2.2% v/v solution of ethyl acetate, C,Hs O2, in water mL of C,Hs O2 mL of water

A: Volume of ethyl acetate and water can be determined as: 2.2% v/v means 2.2 mL of ethyl acetate is…

Q: The freezing point of ethanol, CH3CH,OH, is -117.300 °C at 1 atmosphere. KAethanol) = 1.99 °C/m In a…

A: Given: Mass of compound (solute) = 12.60 g Mass of ethanol (solvent) = 265.8 g Freezing point of…

Q: When 3.97 g of a certain molecular compound X are dissolved in 75.0 g of cyclohexane (C,H2), the…

A:

Q: A saturated solution of Na2S2O3 at 80 degree celsius was determined to be 47.6% by mass. What is…

A:

Q: A certain solution of concentrated aqueous ammonia contains 1.10 mol NH3dissolved in 2.37 mol H2O.…

A: Given: Moles of NH3 = 1.1 And moles of  H2O = 2.37

Q: If 0.300 mol of a nonvolatile nonelectrolyte are dissolved in 3.50 mol of water, what is the vapor…

A:

Q: The boiling point of chloroform, CHC13, is 61.700 °C at 1 atmosphere. K(chloroform) = 3.67 °C/m In a…

A: Elivation in boiling point  ∆Tb = i x Kb  x m where ∆Tb = Ts - To i = 1 ( non electrolyte solute)m…

Q: A 100.0-g sample of a brand of rubbing alcohol contains 66.2 g of isopropyl alcohol, C3H7OH, and…

A: Given: Mass of isopropyl alcohol= 66.2g Mass of water=33.8g

Q: A 8.05 % CH3OH(aq) has a density of 0.976 g/mL at 18°C What is the mole fraction of the solvent in…

A: The mole fraction of solvent in 8.05 % CH3OH(aq) is calculated as,

Q: A sulfuric acid (H2SO4 d=1.83g/mL) aqueous solution having 5.8321 Molar Concentration with a density…

A: The mole of solute present in a one-liter solution is known as the molarity of the solution. The…

Q: A solution containing 27.55 mg of an unknown protein per 25.0 mL solution was found to have an…

A: ANSWERE IS DISCUSSED BELOW :

Q: A 250 mL solution containing 21.4 g of a polymer in toluene had an osmotic pressure of o.055 atm at…

A: Given data, Osmatic pressure of toluene π=0.055 atm Temperature T=27°C=(27+273)=300K Volume V=250…

Q: Calculate the molality of a solution of 90 grams of glycerin (C3H8O3) in 200 grams of water

A: Molality means in a 1000 ml solvent how many moles of solute is present.

Q: The freezing point of a solution containing 65 g of a compound in 100 g of  benzene is 3.80C. What…

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Q: The boiling point of benzene, C6H6, is 80.100 °C at 1 atmosphere. Kb(benzene) = 2.53 °C/m In a…

A: Boling Point = 80.100oC Kb = 2.53 °Cm-1 Mass of new compound = 11.92 Mass of benzene used = 243.9g =…

Q: What is the osmotic pressure at 25°C when 74.5 mL of a solution containing 5.25 grams of electrolyte…

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Q: A beverage contains tartaric acid, H2C4H4O6, a substance obtained from grapes during wine making. If…

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

A:

Q: In an experiment analyzing a hand sanitizer at 20 degrees celsius, the density of ethanol,…

A: Here we are required to find the density of an ideal solution containing 62.00% by mass of ethanol…

Q: 1. A chemical technician assessed the composition of a liter of seawater and found to contain…

A: Here we are required to find the Molarity and molality of the solution

Q: Sucrose is a covalent compound that has the formula C12H22O11. What is the mole fraction of sucrose…

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Q: Calculate the molality of a solution containing 10.8 g of ethylene glycol (C2H6O2) in 360 g of…

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Q: A solution containing 25.60mg of an unknown protein per 27.5 mL solution was found to have an…

A: The osmotic pressure equation is employed to determine the molarity of unknown protein solution.

Q: Mass of test tube, beaker, and cyclohexane = 100.17 g Mass of test tube and beaker =  84.07 g…

A: The mass of the test tube, beaker, and cyclohexane = 100.17 g The mass of the test tube and beaker =…

Q: In a laboratory experiment, the freezing point of an aqueous solu- tion of glucose is found to be…

A: ∆Tf = i × kf × m  where ;  ∆Tf is freezing point depression i is van't hoff factor  Kf is freezing…

Q: Creatinine, C4H7N3O, is a by-product of muscle metabolism, and creatinine levels in the body are…

A: We need to determine the molality of a normal creatinine level in a 30.0 mL blood sample.Given…

Q: The freezing point of benzene is 5.5oC. What is the freezing point of a solution of 205 g of…

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Q: What molality of a nonvolatile, nonelectrolyte solute is needed to raise the boiling point of water…

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Q: Caffeine is a stimulant found in tea and coffee. A sample of Caffeine was dissolved in 45.0 g of…

A: Answer: grams of caffeine in the sample is 0.826 g

Q: Calculate the molarity, molality and normality of the following aqueous solutions: a) muriatic acid…

A: Following formulas are used to determine the Molarity, Molality and Normality of the solution - (1)M…

Q: molality   m mole fraction   molarity

A: 24.1 % by mass means, 100 g solution contains 24.1 g LiCl solute.  So, mass of solution = 100 g Mass…

Q: Consider a mixture of hexane and heptane as an ideal solution. In what proportion by mass should…

A: ∆mixS is the entropy of mixing which is defined as the increase in entropy when two or more separate…

Q: How many grams of oxygen can be dissolved in 250 ml of aqueous solution when the total pressure…

A: Welcome to barlteby! We have to calculate weight of O2 in solution .

Q: What is the mole fraction of acetone, C3H6O, in the vapor phase from a solution consisting of a…

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Q: The common laboratory solvent chloroform is often used to purify substances dissolved in it. The…

A: From given We know,the formula for  nonvolalatile and nonelectrolyte solute solution Psolution =…

Q: calculate the molarity of a solution prepared by dissolving 100g of glucose(C6H12O6) in 350 G of…

A: We are to calculate molarity of 100 gram glucose in 350 gram of water. Given :  Weight of solute (w)…

Q: A 5.2 molal aqueous solution of methyl alcohol, CH3OH is supplied. What is the mole fraction of…

A: The mole fraction is defined as the number of moles of a particular component is divided by total…

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: A 16.00% aqueous solution of glycerol, HOCH2CH(OH)CH2OH, by mass, has a density of 1.037 g/mL. What…

A:

Q: The normal freezing point of a certain liquid X is 0.60°C, but when 0.14 kg of barium hydroxide…

A: Given : Mass of barium hydroxide, Ba(OH)2 i.e solute = 0.14 Kg = 140 g         (since 1 Kg = 1000 g)…

Q: 1.Calculate the molality of a solution containing 10.8g of ethylene glycol (C2H602) in 360g of…

A: Molality of solution is defined as number of moles of solute dissolved per kg of solvent.

Q: molar mass

A:

Q: The freezing point of benzene, C,H6. is 5.500 °C at 1 atmosphere. K(benzene) = 5.12 °C/m In a…

A: A numerical problem based on colligative property, which is to be accomplished.

Q: The freezing point of an aqueous solution of barium nitrate is -2.65°C. Determine the apparent molal…

A: Given: Freezing point of solution = -2.65°C Freezing point of water = 0°C Molal freezing point…

Q: grams

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Q: A student dissolves 16.g of benzoic acid C7H6O2 in 125.mL of a solvent with a density of…

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Q: What volume of ethylene glycol (C2H6O2), a nonelectolyte, must be added to 14.0 L water to produce…

A: ∆Tf = Kf x Molality Molality = Number of moles of solute/Mass of solvent in Kg

Q: Calculate the osmotic pressure of a solution containing 24.6 g of glycerin (C3H8O3) in 250.0 mL of…

A: Given: Mass of glycerine = 24.6 g Temperature = 298 K Volume of solution = 250 mL

Q: A 100.0-g sample of a brand of rubbing alcohol contains 66.5 g of isopropyl alcohol, C3H7OH, and…

A:

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.