(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: Principles and Modern Applications (11th Edition)
- Define a crystalline solid. Describe in detail some important types of crystalline solids and name a substance that is an example of each type of solid. Explain how the particles are held together in each type of solid (the interparticle forces that exist). How do the interparticle forces in a solid influence the bulk physical properties of the solid?arrow_forwardDissolving 3.0 g of CaCl2(s) in 150.0 g of water in a calorimeter (Figure 5.12) at 22.4 °C causes the temperature to rise to 25.8 °C. What is the approximate amount of heat involved in the dissolution, assuming the specific heat of the resulting solution is 4.18 J/g °C? Is the reaction exothermic or endothermic?arrow_forwardWhat mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH?arrow_forward
- Fluoridation of city water supplies has been practiced in the United States for several decades. It is done by continuously adding sodium fluoride to water as it comes from a reservoir. Assume you live in a medium-sized city of 150,000 people and that 660 L (170 gal) of water is used per person per day. What mass of sodium fluoride (in kilograms) must be added to the water supply each year (365 days) to have the required fluoride concentration of 1 ppm (part per million)that is, 1 kilogram of fluoride per 1 million kilograms of water? (Sodium fluoride is 45.0% fluoride, and water has a density of 1.00 g/cm3.)arrow_forwardClassify the following as being a solution or not a solution. Explain your reasons when you classify one as not a solution. For the ones classified as solutions, identify the solvent and solutes. a.Maple syrup b.Milk c.Eyedrops d.Tomato juice e.Tap waterarrow_forwardWithout consulting your textbook, list and explain the main postulates of the kinetic molecular theory for gases. How do these postulates help us account for the following bulk properties of a gas: the pressure of the gas and why the pressure of the gas increases with increased temperature; the fact that a gas tills its entire container; and the fact that the volume of a given sample of gas increases as its temperature is increased.arrow_forward
- In the distillation of a pure substance (e.g., water), why does all of the water not vaporize at once when the boiling point is reached?arrow_forwardDescribe the changes that occur between the time excess solute is placed into water and the time the solution becomes saturated.arrow_forwardLauryl alcohol is obtained from the coconut and is an ingredient in many hair shampoos. Its empirical formula is C12H26O. A solution of 5.00 g of lauryl alcohol in 100.0 g of benzene boils at 80.78C. Using Table 10.2, find the molecular formula of lauryl alcohol.arrow_forward
- Consider the following solubility graph. (a) At point A, how many grams of the compound are dissolved in 100 g of water? Is the solution saturated, unsaturated, or supersaturated? (b) At point B, how many grams of the compound are dissolved in 100 g of water? Is the solution saturated, unsaturated, or supersaturated? (c) How would you prepare a saturated solution at 30C?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_forward1. It is a common observation that when sun comes out immediately after a rain shower, the puddles formed from the rain dries up faster than if it remains cloudy. Explain, on the molecular level, why this occurs.arrow_forward
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