10. A student dissolved 30 g of an unknown compound in 50 g of water at 39°C. What is the unknown compound?

Q: 1 A certain liquid X has a normal freezing point of -7.40 °C and a freezing point depression…

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Q: 6. From the following cooling curve, which temperature is the most possible freezing temperature for…

A: Cooling curve :-  The graph of temperature vs time to find the freezing point of substance is called…

Q: How many grams of NaCl required to prepare each of the following solutions: a) 2500 ppm (w/v) NaCl…

A: (a). Given,  ppm of NaCl = 2500  Volume of the solution = 250 mL  Mass of NaCl = ?

Q: For items 10-11, the following solutions were prenared with their respective concentration: I. 0.02…

A: When solute is added to solvent , then the solution would have higher boiling point and lower…

Q: A certain liquid X has a normal freezing point of 0 °C and a freezing point depression constant K, =…

A: Given: Normal freezing point of solvent i.e. X = 0.0 oC Kf of X = 7.44 oC/m. Mass of C7H7NO…

Q: A certain substance X has a normal boiling point of 131.9°C and a molal boiling point elevation…

A: Given information:Mass of X (solvent) = 600 gBoing point of X (Tb0) = 131.9 °CBoling point of…

Q: A certain liquid X has a normal freezing point of -6.50 °C and a freezing point depression constant…

A: Since the mass of solute KBr = 15.2 g hence moles of KBr = mass / molar mass = 15.2 / 119 = 0.12773…

Q: A particular water sample that is saturated in CaF2 has a Ca²+ content of 105 ppm (that is, 105 g…

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Q: C. 0.950 mg of Hg present in 350 g of solution, what is the Hg concentration in ppm?

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Q: A certain liquid X has a normal boiling point of 129.30°C and a boiling point elevation constant…

A: We are here given, normal boiling point of liquid X=129.3°C boiling point of solution (solution of X…

Q: 7. Sodium chloride is dissolved in water as given in the choices. Which sólution is most…

A: Correct option is C.  6 g of NaCl dissolved in 5 g of H2O. Concentration is expressed in different…

Q: If 50g of NH4Cl is put into 100g of water at 60 deg C is the solution ? Is it saturated or…

A: In this question, we will determine that 50g NH4Cl is saturated or unsaturated or supersaturated.…

Q: A solution of toluene in 301g of cyclohexane has a boiling point of 90.3 degrees C. How many moles…

A: The elevation in the boiling point (b.pt) of cyclohexane (ΔTb) is calculated using equation (1) in…

Q: 5,00 g of glucose, C6H12O6, is dissolved in 72,8 g of water. What will be the freezing point and the…

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Q: How many grams (of mass mmm) of glucose are in 155 mLmL of a 5.50%% (m/v) glucose solution?

A: Given: % (m/v) glucose solution = 5.50 % Volume of glucose solution = 155 mL

Q: The normal boiling point of a certain liquid X is 106.80°C, but when 125.g of potassium bromide…

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Q: A solution of KClO3 contains 10 grams of solute dissolved in 100 grans of water. At 20 degrees…

A: Solute and solvent together constitute the solution. Solutions are of two types. Homogenous and…

Q: A .9M solution of magnesium chlorate is prepared with 40g of magnesium chlorate how much water was…

A: Given: Mass of magnesium chlorate (Mg(ClO3)2) = 40.0 g Concentration of Mg(ClO3)2 = 0.9 M Molar mass…

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: The solubility of glucose is 357 g/100 g H2O at 70°C. A solution is prepared by mixing 450g of…

A: At T = 70℃  Solubility of Glucose is 357 g / 100 g of H2O Thus, 357 g of Glucose dissolved in 100 g…

Q: Wastewater from a cement factory contains 0.25 g of Ca²⁺ ion and 0.056 g of Mg²⁺ ion per 100.0 L…

A: Given: Mass of Ca2+ ion    = 0.25 g Mass of Mg2+ ion   = 0.056 g Density of solution  = 1.001 g/mL…

Q: Needed is 900 cc of 1/3 (v/v) alcohol in water. How many cc of each component are needed to prepare…

A: Concentration of solution = 1/3 (v/v)  Volume of solution = 900 cc We need to find volume of each…

Q: Budweiser

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Q: A certain liquid X has a normal freezing point of 7.10°C and a freezing point depression constant…

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Q: Solution 10% w/v solution of NaCI .means that 10 gm of NaCl in 1000 ml of solution. 100 gm of NaCl…

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Q: A 15% milk solution is prepared by dissolving g of milk in 0.5L of water.

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Q: a1.5 molal solution of NaCl is prepared. How many grams of NaCl are present in a sample containing…

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Q: A certain liquid x has a normal boiling point of 119.60 °C and a boiling point elevation constant…

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Q: Determine the freezing point of a solution prepared by dissolving 10.0 g of camphor (C10H16O) in…

A: Given information:Mass of camphor is 10.0 gMass of benzene is 90.0 gKf is 5.12oC/mnormal freezing…

Q: A solution is made using 141.3 g of phenol (MM = 94.11 g/mol) and 70.0 g of acetone (MM = 58.08…

A:

Q: A certain liquid X  has a normal freezing point of  −3.40°C  and a freezing point depression…

A: Given information: Mass of ionic solid = 800 g Molal freezing point constant for X (Kf) = 4.99 °C/m…

Q: magnesium chloride is an important coagulant used in the preparation of tofu from soy milk. Its…

A: Given : mass of magnesium chloride taken = 16.2 g Mass of water taken = 38.2 g And solubility of…

Q: Determine the freezing point (in °C) of a solution that contains 204 g of CsH1206 dissolved in 234…

A: Formula used :-  ∆Tf = Kf×m  Where m = molality

Q: Seawater contains0.0079 g of Sr2+ per kilogram of water. What is the concentrationof Sr2+ in ppm?

A: The concentration of Sr2+ ions in ppm is calculated as follows:

Q: What is the volume in mL of ethanol needed in 650 mL solution of 2.3 v/v% ethanol in water?

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Q: How many grams (of mass m) of glucose are in 245 mL of a 5.50%(m/v) glucose solution?

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Q: An aqueous solution of HNO3 was prepared having a molality concentration of 6.29. (Atomic…

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

Q: A certain liquid X has a normal freezing point of 1.30 °C and a freezing point depression constant…

A:

Q: A student dissolves 13. g of biphenyl (C1,H10) in 475. mL of a solvent with a density of 1.13 g/mL.…

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Q: What is the mass of the solvent in 15% NaCl solution? a. 100g b. 15g c. 85g d. 75g

A: What is the mass of the solvent in 15% NaCl solution?

Q: How many grams (of mass m) of glucose are in 155 mL of a 5.50% (m/v) glucose solution?

A: Let 100 % be treated as 100 gram in 100 mL of water. Therefore, 5.50 % solution contains 5.50 gm…

Q: A certain liquid X has a normal freezing point of 0.90°C and a freezing point depression constant…

A: According to the depression in freezing point expression, ∆Tf = i × Kf × m Where, ∆Tf = Tfsolvent -…

Q: A flask contains two compartments (A and B) with equal volumes of solution separated by a…

A: Initially, we have the same volume of water in both compartments A and B. when we separate two…

Q: Q1: The density of 78.5 g of methanol (Mwt. = 32) is 0.89 g/ml. What is the Molality of the…

A: Molality (m), or molal concentration, is the amount of a substance dissolved in a certain mass of…

Q: Wine is typically 12.0% (v/v) ethyl alcohol, a typical serving of wine is 150 mL, what is the volume…

A: The solution is 12% (v/v) ethyl alcohol, it means the 100 mL wine has 12 mL ethyl alcohol.  Given…

Q: A certain substance X has a normal freezing point of  −8.9°C and a molal freezing point depression…

A:

Q: The normal boiling point of a certain liquid X is 109.50°C, but when 44.2g of benzamide (C7H7NO) are…

A: The question is based on the concept of solution. elevation in boiling point is a colligative…