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: 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: 13. What is the molality of a solution when 12 g of NH3 (17.031 g/mol) is dissolved in 250 g water?…

A: Molality (m) : Number of moles of solute (n) present in 1Kg of solvent (W) is called molality (m)…

Q: This is toluene, which solvent would you use to dissolve it? CH3 HC CH CH CI

A: Toluene is a Non- polar Molecule . Hence, Dissolve  only in Non - polar Solvent . Amon them only…

Q: Acetone (molar mass = 58.0 g mol-1) has a vapor pressure at a given temperature of 161 torr. At the…

A: Given, Acetone (molar mass = 58.0 g mol-1) has a vapor pressure at a given temperature of 161 torr.…

Q: The density of a particular solvent is 5.15g/L with a volume of 3981cm^3. If you add 0.00518kg of…

A: Molality of a solution is defined as the number of moles of solute per kilogram of solvent. The SI…

Q: Calculate the molality of alum and the molality of the cream of tartar in the solution of mordant.…

A: Given: mass of Alum = 2 g mass of cream of tartar = 1 g Volume of water = 100 mL molar mass of Alum…

Q: The boiling point of ethanol, CH3CH,OH, is 78.500 °C at 1 atmosphere. K,(ethanol) = 1.22 °C/m In a…

A: When a non-volatile substance is added into the solution ,boiling point of solution increases This…

Q: What mass (in grams) of potassium hydrogen phthalate (KHP) would you need to make 250.0 mL of a…

A: Molarity :- It is the number of moles of the solute dissolved per liter of the solution. It is…

Q: 3. A 5.00 gram sample of lauryl alcohol is dissolved in 100 g of benzene (k,=5.10 °C/m). The normal…

A:

Q: Suppose that you add 25.6 g of an unknown molecular compound to 0.250 kg of benzene, which has a Kf…

A:

Q: When 0 279 g of a molecular compound, beazonc acid, was dissolved in 430 g of benzene, the freezing…

A: The depression in the freezing point is the colligative property and it is defined as the drop in…

Q: 16. Consider two statements and state whether they are true or false: (1) If the enthalpy of…

A: Solvation depends on the solvation energy i.e. the change in Gibbs free energy, which expressed as…

Q: Calculate the molality of a solution that contains 70g naphthalene C10H8 in 100 g of water. The…

A: Given :-  Mass of naphthalene = 70 g  Mass of water = 100 g  To calculate :-  Molality of solution

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: Suppose 0.125 g of a protein is dissolved in 10.0 cm3 of ethyl alcohol (C2H5OH), whose density at…

A: Biomolecules plays an important role in human body. Their molecular mass is determined by use of…

Q: An aqueous solution of HNO3 was prepared having a molal concentration of 6.29. (Atomic weights: H=1…

A: The answer for part (a) is given below. Kindly repost the other subparts as separate question Given:…

Q: Highways are salted to reduce ice on roads. What is the freezing point when 2 samples of 125 g NaCl…

A: When a non-volatile solute is added to a solvent, the freezing point of a solvent decreases and this…

Q: (a)Determine the molality of a 10% w/w solution if the molecular weight of the solute is 120 g/mol.…

A: All the necessary calculations have been done in the following step.

Q: At 50°C, the solubility of KCL in water is 42.6 g in 100 g water. What is the molality of KCL in…

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

Q: When 126. g of glycine (C₂H₂NO₂) are dissolved in 1450. g of a certain mystery liquid X, the…

A: In this question, we have to find out the van't hoff factor for iron (III) chloride in X The…

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: Colligative Properties The boiling point of chloroform (CHCl3) is 61.7C.  When a nonvolatile solute…

A:

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: A solution of ethanol, C₂H5OH, in water has a concentration of 4.246 mol L-¹. At 20.0 °C its density…

A: Information about the question

Q: Ice cubes from a freezer have a temperature of about -12°C (10°F), which is cold enough, but contact…

A: Det Tf=i ×Kf×m ion ,i for Nacl-->Na+ +Cl- i=2

Q: was made by dissolving 479.32 g or aluminum AIC13) in enough water to make 500.0 solution. The…

A:

Q: A 3.40-g sample of a mixture of naphthalene (C₁₀H₈) and pyrene (C₁₆H₁₀) is dissolved in 35.0 g…

A: Assuming mass of naphthalene in the mixture is y. Hence mass of pyrene = mass of mixture - mass of…

Q: The boiling point of an aqueous solution is 101.18 ∘C. What is the freezing point?

A:

Q: 2. Calculate the molality of each of the following solutions: (a) 0.710 kg of sodium carbonate…

A: The molality of the solution can be determined by using the formula given below as;…

Q: A solution was in a prepared by dissolving 5.46 g of para-dichlorobenzene (C6H4Cl2) in 50.0 mL…

A: Molality of any solution can be determined by dividing the number of moles of solute by the mass of…

Q: Acetone (molar mass = 58.0 g mol) has a vapor pressure at a given temperature of 166 torr. At the…

A:

Q: Calculate the van't Hoff factor for iron(III) chloride

A: Since, nitrobenzene C2H5NO2 is non electrolyte it will be having vantoff factor 1  Now  Since mass…

Q: 5. The vapor pressure of benzene is 73.03 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that…

A: Relative lowering of vapour pressure     =  (Po-P)/Po  where Po is vapour pressure of pure solvent…

Q: The boiling point of ethanol, CH3 CH₂OH, is 78.500 °C at 1 atmosphere. Kb (ethanol) = 1.22 °C/m In a…

A: The colligative properties are those properties of solutions that depend on the number of solute…

Q: acid, CH3COOH, is 1.0187 g/mL. What is (a) the molarity? (b) the molality? (c) the mole fraction of…

A: Molarity is the moles of solute in 1 L of solution. Molarity=moles of solutevolume of solution (L)…

Q: The freezing point of an aqueous solution containing 35 g of an nonelectrolyte in 150 mL water is…

A: Given:  Kf = 1.86°C/m for water Mass of solute = 35 g Volume of water = 150 mL = 150g  Freezing…

Q: A certain molecular compound M has a solubility in acetonitrile of 12.6 at 10. °C. Calculate the…

A: Solubility is defined as the amount of solute that is dissolved in the solvent. It is expressed in…

Q: The mass of iron(II) sulfide that is dissolved in 250 mL of a saturated solution is grams.

A:

Q: When 225. g of urea (CH,N,0) are dissolved in 1200. g of a certain mystery liquid x, the freezing…

A:

Q: A solution is composed of 1.40 mol cyclohexane (P∘cy=97.6 torrPcy∘=97.6 torr) and 2.50 molmol…

A:

Q: Calculate the molar mass (MM) of an unknown solid when 1.0 g was dissolved in 225 mL (225 g) water.…

A: Given: Mass of compound (solute) = 1.0 g Mass of water (solvent) = 225 g Freezing point of pure…

Q: n öf 2.50Ug UI BHT II| 100!0 What is the molecular weight of BHT?

A: When a non-volatile solute is added to a solvent, the freezing point of a solvent decreases and this…

Q: The boiling point of chloroform, CHCI,, is 61.700 °C at 1 atmosphere. K₁(chloroform) = 3.67 "C/m In…

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.