A certain substance X has a normal boiling point of 131.9°C and a molal boiling point elevation constant =Kb·1.78°C·kgmol−1. A solution is prepared by dissolving some urea ((NH2)2  CO) in 600.g of X. This solution boils at 133.7°C. Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.

Q: normality of the solution having a density of 1.90 g/cc and is 15% m/m sulfuric acid. 2.0982 M,…

A: Molarity(M) is No. of moles of solute per Litre of the solution. M=nV Normality(N) is grams…

Q: solution is 12.3% ethanol in water. If 10.5mL of ethanol is in the solution, what is the volume of…

A: % of ethanol = 12.3  Volume of ethanol = 10.5

Q: How many grams of N a Cl would need to be added to 558.00 grams of water to lower the freezing point…

A: Given : freezing point of solution = -12.8 oC. And mass of water i.e solvent = 558.00 g = 0.558 Kg…

Q: For each of the following solutions, calculate the normality

A: 1) For acids:  N = M × Basicity  Where basicity is no.of  replaceable H+ ions by an acid  2) For…

Q: What is the Normality of a solution made by dissolving 8.5g of H2SO4 in enough water to make 500. mL…

A:

Q: A group of students were weighing some CaCl2(s) but they forgot to record the mass.  They know that…

A: Given  Volume of solvent ( water ) = 50 ml Density of water = 1 g/ml Freezing point of pure solvent…

Q: If one mixes 50 cm3 of EtOH and 50 cm3 of H2O at room temperature; will the total volume of the…

A: Partial molar volume give the answer for this question. Water H2O Ethanol C2H5OH

Q: When an aqueous ethanol solution is 95% ethanol by mass, we can immediately deduce that 100 g of the…

A: In an ethanol solution, ethanol is the solute and water is the solvent.

Q: True or False: When performing calculations with dilute aqueous solutions (< 1% or 0.2 M), you can…

A:

Q: How many parts per million (ppm) is 1mg/L? * 1ppm 10ppm 100ppm 1000ppm

A:

Q: 3. A solution of 20.91 % by weight H,SO, has a specific gravity of 1.150. What is the normality of…

A: In 20.91 % by weight H2SO4 solution, 20.91 g of H2SO4 in 100 g of solution. The normality of this…

Q: The molar volumes of pure acetone and pure chloroform at room temperature are 72.0 cm^3 and 81.0…

A: The volume of one mole of acetone is = 72.0 cm^3 The volume of one mole of chloroform is = 81.0 cm^3…

Q: Ca(OH)2 (aq) + HNO3 (aq) → H2O(1) + Ca(NO3)2 (aq) Express your answer as a chemical equation.…

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: An aqueous solution of potassium sulfate, K2SO, is made by dissolving 27.6 grams of potassium…

A: W/V% =( weight of solute/ volume of solution)*100

Q: 5. In a flask, you heat a mixture of 735.4 g of sodium nitrate and 700.0 grams of water until all of…

A: Given that, Mass of sodium nitrate dissolved in 700 g hot water = 735.4 g Mass of sodium nitrate…

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

A:

Q: Calculate the boiling point of a solution of 154.09 g of ethylene glycol (C2H6O2) (MM = 62.0678)…

A: When ethylene glycol will add in water then elevation in boiling point is given below.…

Q: Twenty grams of potassium dichromate (K₂Cr₂O) is dissolved in 150 mL of water What is its normality…

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Q: Hydrochloric acid NF contains approximately 37 g of hydrochloric acid (HCl) in 100 g solution of HCl…

A:

Q: 2. The process of formation of a liquid solution can be better understood by breaking the process…

A: Given: Process of formation of a liquid solution that can be better understood by breaking the…

Q: Directions Through the given situations below, answer the following questions 1 A mixture of…

A: Since you have posted multiple questions we will solve first question for you. If you want any…

Q: 16. Water and acetonitrile, CH3CN, are miscible (can be mixed in any proportions). However, when…

A: Ans Water and methylcyanide are miscible with each other. Total volume of the solution = Volume of…

Q: What is the volume percent of a solution made by mixing 29.5 teaspoons of high fructose corn…

A: Volume percent can be calculated by using the formula as:

Q: if you titrated your acid sample to a bright pink rather than faint pink endpoint? if your "acetic…

A: If you titrated your acid sample to a bright pink rather than faint pink endpoint. The amount of…

Q: how many grams of table salt must be added to half a liter of water to raise its boiling point by 15…

A:

Q: How many grams of N a Cl would need to be added to 493.00 grams of water to lower the freezing point…

A: Depression in freezing point is defined as the decrease in freezing point temperature  of any…

Q: How many grams of CaCl2 are needed to make 388.8 g of a solution that is 34.0% (m/m) CaCl2 in water?…

A:

Q: A nitric acid solution is labelled 6.0% W/W nitric acid by mass. What mass, in kg, of pure solute is…

A: Given, Mass of solution = 1.84 Kg Concentration % (w/w) = 6.0 % Required, Mass of pure solute = ?

Q: Calculate the normality of a solution that contains 2.68 grams of H2S in 790mL of solution.…

A: Given reaction equation: H2S + 2NaOH = Na2S + 2H2O Amount of H2S w = 2.68 g Molar mass of H2S  = 34…

Q: The solubility of potassium nitrate is 155 g per 100 g of water at 75°C and 38.0 g at 25°C. What…

A:

Q: Gypsum is the hydrate of calcium sulfate, CaSO4 · 2 H20. It is the primary material in sheet rock,…

A: Hydrated crystal contains certain number of water molecules. When hydrated crystal is heated these…

Q: To Fahrenheit ['F] = ([°C] x 1.8) + 32 To Kelvin [K] = [°C] + 273.15 %3D o Celsius [°C] = [K] –…

A: Mass of  CuSO4 = 297.6 g Moles of CuSO4 =mass/MM       = 297.6/159.5 = 1.87 mol Volume of solution =…

Q: normality of the sulfuric acid solution assuming you have 1L of the solution?

A:

Q: Calculate the freezing point and boiling point for 0.43 molmol ethylene glycol and 0.17 mol KBrmol…

A: Boiling point =374.8K (Upto one decimal place) Freezing point= -6.5K (upto one decimal place)

Q: A chemist mixes 18. g of ethanol with 61. g of thiophene and 27. g of methanol. Calculate the…

A: Ethanol = 18g  Thiophene =61g  Methanol = 27g  Total mass of mixture = 18+ 61 +27 = 106 g    106 g…

Q: Fluoridation is the process of adding fluorine compounds to the drinking water. Fluoridated water…

A:

Q: A chemist mixes 59.3 g of acetone with 97.8 g of 2-ethyltoluene and 47.1 g of isopropenylbenzene.…

A: Mass percent is defined as the mass of the substance divided by the total mass of the mixture ,…

Q: 240 220 200 NaCIO3 180 4KNO3 160 140 KBr 120 100 NaCI 20 40 100 120 Temperature (°C) Solubility…

A: Solubility is defined as the amount of a substance dissolved per 100 g of a solvent at a particular…

Q: What conclusions can you draw about the solubility of gases as temperature increases? Figure 3…

A: As we know that the solubility of the gases in the solvent depends on the temperature and pressure…

Q: The three sets of units for expressing density (or concentration, as in “mass of solute per unit…

A: The density is the mass mass of solute per unit volume of solvent. Therefore, it can be expressed in…

Q: The solubility of lead nitrate at 100 degrees C is 140.0g/100g of water. A solution at 100 degrees C…

A: Solubility is defined as the maximum amount of solute that can be dissolved in a defined volume of…

Q: The minimum level of mercury levels in water considered safe is 1 part per billion (ppb) by weight.…

A: The volume of water is = 8.52 L The concentration of mercury in the water sample is = 0.59 parts per…

Q: Consider the table below: Compound Density Ether 0.8415 g/mL Dichloromethane 1.311 g/mL Water 1.00…

A: From the given data of densities of ether, dichloromethane and water – it is clear that density of…

Q: How many grams of Na Cl would need to be added to 318.00 grams of water to lower the freezing point…

A: Given: Mass of water = 318.00 g = 0.318 Kg                                   (Since 1 Kg = 1000 g)…

Q: A scientist has a beaker containing 20 mL of a solution containing 20% acid. To dilute the acid, she…

A: a.) Given: The amount of water added is 7 ml. Introduction: The concentration, C(n) of acid in the…

Q: Concentration of a solution can be expressed is several ways, such as the following: molar…

A: The amount of solute present in a solution known as the concentration of the  that solution.thus the…

Q: A group of students were weighing some CaCl2(s) but they forgot to record the mass.  They know that…

A:

Q: If 400 cc of 15% (v/v) acetic acid is mixed with 800 cc of 35% (v/v) acetic acid, what are the total…

A:

Q: What would be the volume percentage of the final solution made by mixing 200. mL of ethanol into 2.5…

A: Volume percent (v/v)% :-  The volume of solute in mL present in 100 mL of solution is defined as…

Q: If a sample of water is being determined to contain 389 ppm of lead, how many g of lead does one…

A: