(a)
Interpretation:
The area (in square meter) of water surface covered by a monolayer made from given molecule should be calculated.
Concept introduction:
The mathematical expression to determine the number of moles is:
(b)
Interpretation:
The length of stearic acid molecule should be calculated in nanometers.
Concept introduction:
The relationship between mass and volume is:
(c)
Interpretation:
The approximate value of
Concept introduction:
Avogadro’s number is the number of particles found in one mole of a substance. The value is approximately
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Chapter 3 Solutions
GENERAL CHEMISTRY-MOD.MASTERINGCHEM.
- Suppose that you are closing a cabin in the north woods for the winter and you do not want the water in the toilet tank to freeze. You know that the temperature might get as low as 30. C, and you want to protect about 4.0 L water in the toilet tank from freezing. Calculate the volume of ethylene glycol (density = 1.113 g/mL; molar mass = 62.1 g/mol) you should add to the 4.0 L water.arrow_forwardWhat mass of HCl is contained in 45.0 mL of an aqueous HCl solution that has a density of 1.19 g cm-3 and contains 37.21% HCl by mass?arrow_forwardA solution is defined as a homogeneous mixture. Is a small sample of air a solution? Is the atmosphere a solution?arrow_forward
- How will aqueous solutions of sucrose and hydrogen chloride differ?arrow_forwardThe units of parts per million (ppm) and parts per billion (ppb) are commonly used by environmental chemists. In general, 1 ppm means 1 part of solute for every 106 parts of solution. Mathematically, by mass: ppm=gsolutegsolution=mgsolutekgsolution In the case of very dilute aqueous solutions, a concentration of 1.0 ppm is equal to 1.0 g of solute per 1.0 mL, which equals 1.0 g solution. Parts per billion is defined in a similar fashion. Calculate the molarity of each of the following aqueous solutions. a. 5.0 ppb Hg in H2O b. 1.0 ppb CHCl3 in H2O c. 10.0 ppm As in H2O d. 0.10 ppm DDT (C14H9Cl5) in H2Oarrow_forwardYou are given a 1.50-g mixture of sodium nitrate and sodium chloride. You dissolve this mixture into 100 mL of water and then add an excess of 0.500 M silver nitrate solution. You produce a white solid, which you then collect, dry, and measure. The white solid has a mass of 0.641 g. a. If you had an extremely magnified view of the solution (to the atomic-molecular level), list the species you would see (include charges, if any). b. Write the balanced net ionic equation for the reaction that produces the solid. Include phases and charges. c. Calculate the percent sodium chloride in the original unknown mixture.arrow_forward
- (For Exercises 4546) Solutions containing nickel(II) ion are usually bright green in color. When potassium hydroxide is added to such a nickel(II) solution, a pale-green fluffy solid forms and settles out of the solution. The fact that a reaction takes place when potassium hydroxide is added to a solution of nickel(II) ions is an example of a properly. . The fact that a solution of nickel(II) ion is bright green is an example of a property.arrow_forwardGiven the following solubility curves, answer the following questions: (a) In which of the two compounds can more solute be dissolved in the same amount of water when the temperature is decreased? (b) At what temperature is the solubility of both compounds the same? (c) Will an increase in temperature always increase solubility of a compound? Explain.arrow_forwardThe meat from one hazelnut has a mass of 0.985 g. (a) What is the mass of a millionth of a mole (106) of hazelnut meats? (A millionth of a mole is also called a micromole.) (b) How many moles are in a pound of hazelnut meats?arrow_forward
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