What weight (in grams) of caffeine (C8H10O2N4) is required to prepare 100 mL each of the following solutions: 1) 0.1 M 2) 7% (w/v) 3) 100 ppm 4) 2mM

Q: 15g of sugar was added to the 120g of 20% sugar solution, what is the percent concentration of the…

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Q: The boiling point of a methanolic solution of the non-electrolyte, acetamide (CH3CONH2) is 66.9 ℃.…

A: In this question, we want to determine the mass percentage of acetamide in the Solution. How we can…

Q: Explain how you would prepare the following dilute solutions from more concentrated ones:  200 ml…

A: Dilution of the solution: On dilution of the solution with the pure water, the mole of solute…

Q: xplain how van’t haff factor affects the freezing point and boiling point of a solution

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

Q: A solution made by dissolving 3.46 g of an unknown compound in 85.0 g of benzene froze at 4.13 °C.…

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Q: Caffeine C8H10N4O2 is stimulant found in tea and coffee. A sample of the substance was dissolved in…

A: The molecular formula of Caffeine is = C8H10N4O2 The mass of solvent is = 45.0 g The molality of the…

Q: 7.) Ethylene glycol [CH2(OH)CH2(OH)] is a common automobile antifreeze. It is water soluble and…

A: when a solute  is added to a solution  there is decrese in vapour pressure on the surface of…

Q: A 250.0 mL aqueous solution contains 45.1 mg of a pesticide. Express the pesticide's concentration…

A: Given,  Volume of the pesticide = 250.0 mL  Mass of pesticide in mg = 45.1 mg  a). Express…

Q: a) Calculate the amount of sodium chloride required to prepare 40 mL of a concentrated solution so…

A: a) It is stated that the 1 in 20 diluted solution is isotonic.

Q: 12.60 Propranolol (C16H2NO2), a so-called beta-blocker that is used for treatment of high blood…

A: a) Parts per billion ( ppb ) : It is defined as number of parts by weight of solute present in…

Q: Average Molarity of Cl: 1/1oui Calculated ppm of CF: mg/L. (multiply the above average molarity by…

A: Ppm of Cl- can be calculated using the given formula .

Q: What is the freezing point, in °C, of a solution made with 1.09 mol of CHCI3 in 530.0 g of CCI4 (Kf…

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Q: 1. Calculate the number of grams of copper(II) sulfate pentahydrate, CuSO, 5H,0, required to prepare…

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Q: 5. Distilled beverages are often described by "proof" defined as twice the percentage V solute 1% of…

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Q: The osmotic pressure of a solution formed by dissolving 25mg of aspirin (C9H8O4) in 0.25L of water…

A: The osmotic pressure of any non electrolyte solution is given by  Osmotic pressure = CRT where C =…

Q: To create a saturated solution with 200 grams of water at 50°C, what amount of KNO3 Would be needed?…

A: The answer to the following question is-

Q: Which of the following solutions is likely to have the highest boiling point assuming, for…

A: Elevation in Boiling point is a colligative property i.e. it depends on number of particles not on…

Q: What is the ppm of the C,H,0, if 3.0 mg of it found in 300 kg of drinking water? Type the numerical…

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Q: What is the temperature at which 9 grams of oxygen can be dissolved in 1000 liters of water. x axix…

A: The given graph represents the mass of oxygen dissolved in the water and the temperature of the…

Q: Answers true or false to these statements: 1) The freezing point of aqueous 2.5 m CuSO4 is…

A: Here we have to predict the true or false statements .

Q: A solution of 34.5 (unknown) in 45g of water freezes at -19.2°. What is the molar mass of the…

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Q: A semipermeable membrane is placed between the following solutions. Which solution will increase in…

A: General chemistry.

Q: From the following list of aqueous solutions, select th point. A 1.0 m CuCl2 B 1.0 m NaCl C 1.0 m…

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Q: 8. How many grams of CaCl, will be dissolved in 50g of water at 70°C2 9. What amount of water is…

A: We need to check solubility value at particular temperature from graph.

Q: Important válues if needed for this question. The freezing point of benzene, CH, is 5.500 °C at 1…

A: Given : Boiling point of pure benzene i.e solvent = 5.500 oC Kf of benzene = 5.12 oC/m Boiling point…

Q: Explain the following :(i) Henry’s law about dissolution of a gas in a liquid(ii) Boiling point…

A: According to the mole concept, in terms of mass, the amount of substance in moles is equal to the…

Q: What is the boiling point elevation when 12.0 g of iodine is dissolved in 100 g of carbon…

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Q: A student prefares 3 solutions oro follows: -Solution 1: 1 mol CaHAOH in 1 water -Solution a:1 mol…

A: A colligative property is the property of the solution which depends on the number of moles of…

Q: Methane has a Henry's Law constant (k) of 9.88x10^-2 mol/(L·atm) when dissolved in benzene at 25°C.…

A: Henry's law - it is a gas law states that the amount of dissolved gas in a liquid is directly…

Q: A solution of 22.34 g of an unknown nondissociating compound dissolved in 200.0 g of benzene freezes…

A: Given : mass of compound i.e solute = 22.34 g Mass of benzene i.e solvent = 200.0 g = 0.2000 Kg…

Q: 1. What is the molecular mass of an organic compound if 15.00 g of the compound is dissolved in…

A: Since you have asked multiple questions, we will solve the first question for you as per our…

Q: Solution temperature change:  We mix 34 mL of 0.37 M HCl with 50 mL of 1.0 M sodium hydroxide.  What…

A: The question is based on the concept of chemical thermodynamics. we are mixing hydrochloric acid and…

Q: Show the calculations to prepare 500 mL of each of the following stock solutions: 20% (v/v)…

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Q: A 2.25-mg sample of dioctyl phthalate (C24H38O4), a plasticizer, is dissolved in H2O to give 630. mL…

A: The concentration of any substance can be expressed in different ways such as molality, molarity,…

Q: Question number 20 please thanks.

A: Convert 125 mg into gram. This is done as follows-

Q: Q3 / What is the percent composition (percentage of solution in which 40000 mg of sodium chloride is…

A: Given that,  Amount of NaCl dissolved w = 40000 mg  = 40 g Volume of NaCl solution V = 0.4 L = 400…

Q: 3) When 0.279 g of a molecular compound, benzoic acid, was dissolved in 43.0 g of benzene, the…

A: The molecular weight of the benzoic acid is to be calculated.   The depression in freezing point is…

Q: 1) When 2.25 grams of an unknown non-electrolyte dissolves in 12.0 grams of water the solution…

A: Given, Amount of unknown compound, W1 = 2.25 grams Amount of water, W2 = 12 grams Kf of water is…

Q: In 1 litre Stock copper solution is prepared by weighting 60.6 mg of CuSO4.5H2O. What is the…

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Q: SHORT ANSWER. For the next 7 questions, 31 to 37, develop the answers concisely, show formulas,…

A: It is given that the freezing point of ethanol is -114.6°C and the value of Kf is 2.00°C/m and the…

Q: What is the molar mass of a nonelectrolyte if 6.02g dissolved in 30.0g of benzene freezes at -1.55C?…

A: Mass of solute = 6.02 g Mass of solvent = 30.0 g freezing point of solution (Tf) = -1.55 °C freezing…

Q: 5. When 1.150 grams of an unknown non-electrolyte dissolves in 10.0 grams of water, the solution…

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Q: 12 what is The percent weight of solution prepered by dissolve 5g uf AgNosin 100ml af water.

A: Mass of AgNO3 = 5g Volume of water = 100 mL Density of water = 1 g/mL

Q: Which of the following aqueous solutions has the highest osmotic pressure at 25°C? Select the…

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Q: Q2: Prepare 250ml of solution contain 5ppm of Ca from CaCO; and 5ppm of Pb from P6C1,?

A: Here is your solution

Q: 1. What is the vapor pressure at 20°C of a solution of 3.50 g of naphthalene C1,Hg in 25.0 g of…

A: 1.  Vapour pressure of the solution is 68.83 mmHg

Q: What are the boiling point and freezing point of a 3.47 m solution of naphthalene in benzene? (The…

A: Given:  Kb = 2.53 °C/m m = 3.47 m Solution: ∆Tb = Kb × m = 2.53 °C/m × 3.47 m       = 8.78 °C…

Q: pentane is an organic liquid with a density of 0.626g•mL^-1 that is commonly used as a solvent. What…

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Q: CuSO4•5H2O Percent water in the hydrated salt?

A: The given hydrated salt : CuSO4.5H2O Molecular mass of Cu = 63.55 a.m.u Molecular mass of S = 32.06…