CHEMISTRY: THE CENTRAL SCIENCE
14th Edition
ISBN: 9780134562230
Author: Brown
Publisher: PEARSON
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Textbook Question
Chapter 1.5, Problem 1.4.1PE
Practice Exercise 1
Platinum, Pt. is one of the rarest of the metals. Worldwide annual production is only about 130 tons. Platinum has a density of 21.4g/cm3. If thieves were to steal platinum from a bank using a small truck with a maximum payload capacity of 900 lb, how many 1 L bars of the metal could
They take?
- 19 bars
- 2 bars
- 42 bars
- 1 bar
- 47 bars
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In the video, we looked at the absorbance of a certain substance and how it varies
depending on what wavelength of light we are looking at. Below is a similar scan of a
different substance. What color BEST describes how this substance will appear?
Absorbance (AU)
Violet
Blue
Green
Orange
1.2
1.0-
0.8-
0.6-
0.4-
0.2
0.0
450
500
550
600
650
700
Wavelength (nm)
violet
indigo
blue
green
yellow orange
red
Red
O Cannot tell from this information
In the above graph, what causes -450 nm wavelength of light to have a higher
absorbance than light with a -550 nm wavelength? Check all that are true.
The distance the light travels is different
The different data points are for different substances
The concentration is different at different times in the experiment
Epsilon (molar absortivity) is different at different wavelengths
5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo-
hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number
of significant figures.
B. Freezing Point of Cyclohexane plus
Calculation Zone
Unknown Solute
2. Mass of cyclohexane (g)
10.14
Part C.4
3. Mass of added solute (g)
0.255
C. Calculations
1. k; for cyclohexane (°C⚫ kg/mol)
20.0
2. Freezing point change, AT, (°C)
3.04
Part C.6
3. Mass of cyclohexane in solution (kg)
4. Moles of solute, total (mol)
Show calculation.
5. Mass of solute in solution, total (g)
6. Molar mass of solute (g/mol)
Show calculation.
Chapter 1 Solutions
CHEMISTRY: THE CENTRAL SCIENCE
Ch. 1.2 - Practice Exercise 1 Which of the following is the...Ch. 1.2 - Aspirin is composed of 60.0% carbon, 4.5%...Ch. 1.5 - Practice Exercise 1 Which of the following weights...Ch. 1.5 - Practice Exercise 2 How many picometers are there...Ch. 1.5 - Practice Exercise 1 Using Wolfram Alpha...Ch. 1.5 - Practice Exercise 2 Ethylene glycol, the major...Ch. 1.5 - Practice Exercise 1 Platinum, Pt. is one of the...Ch. 1.5 - Practice Exercise 2 Calculate the density of a...Ch. 1.5 - Which of the following objects has the greatest...Ch. 1.5 - Prob. 1.5.2PE
Ch. 1.6 - Which of the following numbers in your personal...Ch. 1.6 - Practice Exercise 2 The back inside cover of the...Ch. 1.6 - Practice Exercise 1 An object is determined to...Ch. 1.6 - Practice Exercise 2 How many significant figures...Ch. 1.6 - Ellen recently purchased a new hybrid car and...Ch. 1.6 - Practice Exercise 2 It takes 10.5 s for a sprinter...Ch. 1.6 - Practice Exercise 1 You are asked to determine the...Ch. 1.6 - Practice Exercise 1 At a particular instant in...Ch. 1.7 - Practice Exercise 2 By using a conversion factor...Ch. 1.7 - Practice Exercise 1 Fabiola, who lives in Mexico...Ch. 1.7 - Practice Exercise 2 A car travels 28 mi per gallon...Ch. 1.7 - Practice Exercise 2 A car travels 28 mi per gallon...Ch. 1.7 - Practice Exercise 2 The surface area of Earth is...Ch. 1.7 - Practice Exercise 1 Composite decking is a...Ch. 1.7 - Practice Exercise 2 The density of the organic...Ch. 1.7 - Practice Exercise 2 If the mass of the container...Ch. 1 - Prob. 1ECh. 1 - Prob. 2ECh. 1 - Musical instruments like trumpets and trombones...Ch. 1 - Consider the two spheres shown here, one made of...Ch. 1 - Is the separation method used in brewing a cup of...Ch. 1 - Identify each of the following as measurements of...Ch. 1 - Three spheres of equal size are composed of...Ch. 1 - The three targets from a rifle range shown below...Ch. 1 - What is the length of the pencil in the following...Ch. 1 - How many significant figures should be reported...Ch. 1 - Consider the jar of jelly beans in the photo. To...Ch. 1 - The photo below shows a picture of an agate stone....Ch. 1 - Classify each of the following as a pure substance...Ch. 1 - Classify each of the following as a pure substance...Ch. 1 - 1.15 Give the chemical symbol or name for the...Ch. 1 - 1.16 Give the chemical symbol or name for each of...Ch. 1 - A solid white substance A is heated strongly in...Ch. 1 - 1.18 You are hiking in the mountains and find a...Ch. 1 - 1.19 In the process of attempting to characterize...Ch. 1 - 1.20
Read the following description of the element...Ch. 1 - Prob. 21ECh. 1 - A match is lit and held under a cold piece of...Ch. 1 - Which separation method is better suited for...Ch. 1 - Two beakers contain clear, colorless liquids. When...Ch. 1 - Prob. 25ECh. 1 - Prob. 26ECh. 1 - Prob. 27ECh. 1 - Prob. 28ECh. 1 - Prob. 29ECh. 1 - Prob. 30ECh. 1 - 121 What exponential notation do the following...Ch. 1 -
1.32 Use appropriate metric prefixes to write the...Ch. 1 - Make the following conversions. 72 °F to °C, 216.7...Ch. 1 - a. The temperature on a warm summer day is 87 °F....Ch. 1 - Prob. 35ECh. 1 - A cube of osmium metal 1.500 cm on a side has a...Ch. 1 - To identify a liquid substance, a student...Ch. 1 - a. After the label fell off a bottle containing a...Ch. 1 - Prob. 39ECh. 1 -
1.40 Silicon for computer chips is grown in large...Ch. 1 - Prob. 41ECh. 1 - 1.42 A watt is a measure of power (the rate of...Ch. 1 - Indicate which of the following are exact numbers;...Ch. 1 - Indicate which of the following are exact numbers:...Ch. 1 - 1.45 What is the number of significant figures in...Ch. 1 - Indicate the number of significant figures in each...Ch. 1 - 1.47 Round each of the following numbers to four...Ch. 1 - 1.48
The diameter of Earth at the equator is 7926...Ch. 1 - Carry out the following operations and express the...Ch. 1 - Carry out the following operations and express the...Ch. 1 - You weigh an object on a balance and read the mass...Ch. 1 - You have a graduated cylinder that contains a...Ch. 1 - 153 Using your knowledge of metric units, English...Ch. 1 - 1.54 Using your knowledge of metric units, English...Ch. 1 - A bumblebee flies with a ground speed of 15.2 m/s....Ch. 1 - 1 56
a The speed of light in a vacuum is 2.998 x...Ch. 1 - Perform the following conversions: 5.00 days to s,...Ch. 1 - Carry out the following conversions: 0.105 in. to...Ch. 1 - How many liters of wine can be held in a wine...Ch. 1 - If an electric car is capable of going 225 km on a...Ch. 1 - The density of air at ordinary atmospheric...Ch. 1 - 1.62 The concentration of carbon monoxide in an...Ch. 1 - Prob. 63ECh. 1 - 1.64 A copper refinery produces a copper ingot...Ch. 1 - 165 Classify ea. al the folbwing as a pure...Ch. 1 - 1.66
Which is more likely to eventually be shown...Ch. 1 -
1.67 A sample of ascorbic acid (vitamin C) is...Ch. 1 - Prob. 68AECh. 1 - SO Two students deterrmne the percen.ge of lead in...Ch. 1 - 1.70
Is Om use of significant figures in ea. of...Ch. 1 - What type of quantity (for example, length,...Ch. 1 - 1.72 Give the derived SI units for each of the...Ch. 1 - 1.73 The distance from Earth to the Moon is...Ch. 1 - 1.74 Which of the following would you characterize...Ch. 1 -
1.75 The U.S. quarter has a mass of 5.67 g and is...Ch. 1 -
1.76 In the United States, water used for...Ch. 1 -
1.77 By using estimation techniques, determine...Ch. 1 - Suppose you decide to define your own temperature...Ch. 1 -
1.79 The liquid substances mercury (density =...Ch. 1 -
1.80 Two spheres of equal volume are placed on...Ch. 1 - Water has a density of 0.997 g/cm3 at 25C ; ice...Ch. 1 - A 32.65-g sample of a solid is placed in a flask....Ch. 1 - A thief plans to steal a gold sphere with a radius...Ch. 1 - Automobile batteries contain sulfuric acid, which...Ch. 1 - A 40-lb container of peat moss measures 14 x 20 x...Ch. 1 - A package of aluminum foil contains 50 ft2of foil,...Ch. 1 - Prob. 87AECh. 1 -
1.88 In 2005, J. Robin Warren and Barry J....Ch. 1 -
1 89 A 25 0-cm.long cylindrical glass tube,...Ch. 1 -
1.90 Gold is alloyed (mixed) with other metals to...Ch. 1 -
1.91 Paper chromatography is a simple but...Ch. 1 -
1.92 Judge the following statements as true or...Ch. 1 -
1.93 You are assigned the task of separating a...Ch. 1 - Prob. 94AE
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