Concept explainers
(a)
Interpretation:
The mass percentage of
Concept introduction:
The percentage composition of a compound is calculated by comparing the mass contributed by each element to the molar mass of the substance. The sum of the percentage composition of each element is equal to the percentage composition of the compound.
Answer to Problem 44E
The mass percentage of
Explanation of Solution
The value of mass of
The mass percentage is calculated by the formula as shown below.
Substitute the value of mass of
Therefore, the mass percentage of
The mass percentage of
(b)
Interpretation:
The mass percentage of
Concept introduction:
The percentage composition of a compound is found by comparing the mass contributed by each element to the molar mass of the substance. The sum of the percentage composition of each element is equal to the percentage composition of the compound.
Answer to Problem 44E
The mass percentage of
Explanation of Solution
The mass percentage is calculated by the formula as shown below.
The value of mass of
Substitute the value of mass of
Therefore, the mass percentage of
The mass percentage of
(c)
Interpretation:
The mass percentage of
Concept introduction:
The percentage composition of a compound is calculated by comparing the mass contributed by each element to the molar mass of the substance. The sum of the percentage composition of each element is equal to the percentage composition of the compound.
Answer to Problem 44E
The mass percentage of
Explanation of Solution
The mass percentage is calculated by the formula as shown below.
The value of mass of
Substitute the value of mass of
Therefore, the mass percentage of
The mass percentage of
(d)
Interpretation:
The mass percentage of
Concept introduction:
The percentage composition of a compound is calculated by comparing the mass contributed by each element to the molar mass of the substance. The sum of the percentage composition of each element is equal to the percentage composition of the compound.
Answer to Problem 44E
The mass percentage of
Explanation of Solution
The mass percentage is calculated by the formula as shown below.
The value of mass of
Substitute the value of mass of
Therefore, the mass percentage of
The mass percentage of
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Chapter 13 Solutions
EP INTRODUCTORY CHEM.-MOD.MASTERINGCHEM
- The freezing point of a 0.21 m aqueous solution of H2SO4 is -0.796C. (a) What is i? (b) Is the solution made up primarily of (i) H2SO4 molecules only? (ii) H+ and HSO4- ions? (iii) 2H+ and 1SO42- ions?arrow_forward6-20 Give a familiar example of solutions of each of these types: (a) Liquid in liquid (b) Solid in liquid (c) Gas in liquid (d) Gas in gasarrow_forward6-111 As noted in Section 6-8C, the amount of external pressure that must be applied to a more concentrated solution to stop the passage of solvent molecules across a semipermeable membrane is known as the osmotic pressure The osmotic pressure obeys a law similar in form to the ideal gas law (discussed in Section 5-4), where Substituting for pressure and solving for osmotic pressures gives the following equation: RT MRT, where M is the concentration or molarity of the solution. (a) Determine the osmotic pressure at 25°C of a 0.0020 M sucrose (C12H22O11) solution. (b) Seawater contains 3.4 g of salts for every liter of solution. Assuming the solute consists entirely of NaCl (and complete dissociation of the NaCI salt), calculate the osmotic pressure of seawater at 25°C. (c) The average osmotic pressure of blood is 7.7 atm at 25°C. What concentration of glucose (C6H12O6) will be isotonic with blood? (d) Lysozyme is an enzyme that breaks bacterial cell walls. A solution containing 0.150 g of this enzyme in 210. mL of solution has an osmotic pressure of 0.953 torr at 25°C. What is the molar mass of lysozyme? (e) The osmotic pressure of an aqueous solution of a certain protein was measured in order to determine the protein's molar mass. The solution contained 3.50 mg of protein dissolved in sufficient water to form 5.00 mL of solution. The osmotic pressure of the solution at 25°C was found to be 1.54 torr. Calculate the molar mass of the protein.arrow_forward
- Water at 25 C has a density of 0.997 g/cm3. Calculate the molality and molarity of pure water at this temperature.arrow_forwardFructose, C6H12O6, is a sugar occurring in honey and fruits. The sweetest sugar, it is nearly twice as sweet as sucrose (cane or beet sugar). How much water should be added to 1.75 g of fructose to give a 0.125 m solution?arrow_forwardInsulin is a hormone responsible for the regulation of glucose levels in the blood. An aqueous solution of insulin has an osmotic pressure of 2.5 mm Hg at 25C. It is prepared by dissolving 0.100 g of insulin in enough water to make 125 mL of solution. What is the molar mass of insulin?arrow_forward
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