Since molality is the number of moles of solute per kg of solvent, there is 15 g urea in 100 g naphthalene (or 150 g urea in 1000 g naphthalene). 150 = 2.5 mol mol = 60 g Therefore, the molar mass of urea is 60 g/mol." I do not understand where they got the 2.5 moles from in that example. Please explain to me how this was calculated.

Q: Convert 0.301 mol of ammonium (NH) ions to equivalents. 0.301 mol NH = Convert 1.95 mol of sulfite…

A: Moles of ammonium (NH4+) ion = 0.301  Moles of sulfite (SO32–) = 1.95 mol

Q: Calculate the number of grams of solute in each of the following solutions. (a) 4.84 L of a 1.46 M…

A: (a)Provided volume (V1) of HCl =4.84litre Provided molarity (M1) of HCl=1.46M Molar mass of…

Q: What is the mole fraction of solute in a 3.26 m aqueous solution?

A: molality of a solution = 3.26 mmole fraction of a solute =?

Q: Question 3 The solubility of an unknown salt is shown in the graph. If a solution is unsaturated at…

A: In this question we will see what happened when an unknown salt solution cooled.  You can see…

Q: Calculate the molarity of the following solution 285 g of potassium chloride (KCl, 74.55 g/mol) in…

A: Given mass of KCl = 285 g Molar mass of KCl = 74.55 g/mol Number of moles of KCl can be determined…

Q: How many milliliters of a 1.287 M Na3PO4 would it take to make 250.0 mL of a 0.120 M Na* lon…

A: Given that Molarity of Na3PO4 solution=  1.287 M  Molarity of Na+ solution= 0.120 M  Volune of Na+…

Q: PART II.1 Using the information obtained in Part II, complete the following table. Assume the…

A: Answer:Molal concentration of a solution is equal to number of moles of solute present in 1kg mass…

Q: Calculate the number of grams of solute in each of the following solutions. (a) 4.84 L of a 1.46 M…

A: Answer

Q: 3. How many milliliters of 5M NaCl are required to prepare 1500mL of 0.002 M NaCl? 4. what will be…

A: Answer: In dilution process solvent is gradually added into the concentrated solution that increases…

Q: How many milliliters of a 0.22 M sucrose solution contain 0.750 g sucroseZ?

A:

Q: When 65 g of rubbing alcohol is mixed with 35 g of water, the resulting solution has an alcohol mass…

A: The mass of rubbing alcohol is = 65 g The mass of water is = 35 g The mass of solution is = 35 g+ 65…

Q: What is the percent by mass of solute in a solution containing 13.7 grams of solute and 442 grams of…

A: Mass percentage :-        Mass percentage is used as a way of expressing a concentration or a way of…

Q: QUESTION 16 The solubility of an unknown salt is shown in the graph. If a solution is unsaturated at…

A: As we can see on increasing temperature ,the solubility of salt is increasing , thus there is a…

Q: What is the mass % of propylene glycol in a 1.89 M solution of propylene glycol (MM = 76.09 g/mol)…

A: Given- Molarity = 1.89 M Molar mass = 76.09 gm/mole Density of solution = 1.03 g/ml

Q: 4.How many grams of NaCl would be required to create a 12.1 % of a 495 g solution? Numerical…

A: We know that  1 % Solution is defined as 1gram of solute and make upto total mass of 100 gram of…

Q: Given the following information: Aqueous solutions of ammonium sulfate NH4(SO4)2 (MM = 132.15…

A: Given molality of ammonium sulphate  solution is 7.23  Molar mass of ammonium sulphate is 132.15…

Q: A hydrochloric acid solution is 25.0% HCl (by mass). If one bottle of this product contains 124 g of…

A:

Q: What is the molality when 392 mL of water is mixed with 27.5 g of magnesium chloride?   Please…

A: Given information,     Volume of water = 392 mL     Mass of magnesium chloride = 27.5 g

Q: How many grams of a solution that is 5.2 % sucrose by mass are needed to obtain 18 g of sucrose…

A: The mass percentage of the solution is = 5.2 % The amount of sucrose needed is = 18 g The amount of…

Q: A solution is 6.25% by mass Na2SO4. How many moles of Na2SO4 are in 370.0 g of solution? (SHOW…

A: Mass of Na2SO4 present in 370 g of solution = (6.25 / 100) x 370 = 23.125 g

Q: our professor gives you 12.4 g of glucose and tells you to use this to make a 200 mL glucose…

A: Molarity is a representation of the concentration of any solution. It is defined as the number of…

Q: What is the mass of Cobalt per Liter of unknown if your unknown Co(NO3)2 solution is 0.625M (Cobalt…

A:

Q: A solution was made by adding 19.75 grams of NaCl to 157.50 grams of water. What is the mass percent…

A:

Q: The gas sample has a volume of 31.4 μL at 22.6 °C. What is the volume of the gas after the sample is…

A: The initial volume of the gas sample = The initial temperature of the gas sample = The gas sample is…

Q: a chemist is preparing a solution of NaCl He used 250 mL of 0.250 M NaCl solution and diluted it…

A: given; volume of NaCl, V1 = 250mL [NaCl], M1 = 0.250 M volume of water added = 500mL new…

Q: Can you explain this equation M(molarity)= moles of solute/liter of solution. COuld you do an…

A: Molarity can be defined as follows:

Q: Select all of the following that are true:   Select 2 correct answer(s) Question 27 options:…

A: We are to analyse the given statements and chose the correct ones.

Q: 3)Use Table 7.2 from textbook to answer this question. TABLE 7.2 Examples of Solute Solubilities in…

A:

Q: Question 9: Calculate the volume, in liters, for each of the following that provides the given…

A: (a)

Q: Part B Read the following problem and then answer the questions. An 85.0-mL aqueous solution…

A:

Q: Calculate the number of grams of solute in each of the following solutions. (a) 4.86 L of a 2.56 M…

A: The answer to the first three questions can be calculated as follows -

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.