Chemistry (Chang), 10th Edition

Chapter 1: The Study of Change

Self Assessment A

1
Which of the following is an example of a physical property?
A)combustibility
B)corrosiveness
C)explosiveness
D)density
E)A and D
2
Which of the following represents the greatest mass?
A)2.0 x 103 mg
B)10.0 dg
C)0.0010 kg
D)1.0 x 106 μg
E)3.0 x 1012 pg
3
Convert 240 K and 468 K to the Celsius scale.
A)513oC and 741oC
B)-59oC and 351oC
C)-18.3oC and 108oC
D)-33oC and 195oC
4
Calculate the volume occupied by 4.50 X 102 g of gold (density = 19.3 g/cm3).
A)23.3 cm3
B)8.69 x 103 cm
C)19.3 cm3
D)450 cm3
5
The melting point of bromine is -7oC. What is this melting point expressed in oF?
A)45oF
B)-28oF
C)-13oF
D)19oF
E)None of these is within 3oF of the correct answer.
6
How many significant figures are there in the measurement 3.4080 g?
A)6
B)5
C)4
D)3
E)2
7
How many significant figures should you report as the sum of 8.3801 + 2.57?
A)3
B)5
C)7
D)6
E)4
8
Walking fast can consume 5.0 kcal per minute. How many hours of exercise are required to consume 450 kcal, the energy in a large candy bar?
A)7.5 hr
B)1.25 hr
C)1.75 hr
D)1.5 hr
E)1 hr
9
Together, Americans drive about 5.0 x 109 miles per day, and their cars get an average of 22 miles per gallon of gas used. For each kilogram of gasoline used, about 3 kg of carbon dioxide is produced. How many kilograms of CO2 are emitted into the atmosphere by cars in the US each day? [1 gal = 3.5 kg]
A)2 x 109 kg
B)2.4 x 109 kg
C)8.3 x 109 kg
D)1.6 x 109 kg
E)None of the above
10
A bar of gold is measured with the ruler shown. The length of the bar should be reported as:
<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0023654666/17469/ch1quizaq6.gif','popWin', 'width=242,height=133,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (1.0K)</a>
A)3 cm
B)3.0 cm
C)2.7 cm
D)2 cm
11
Which of the following are major advances of the past century that have enabled us to prevent and treat diseases?
A)Gene therapy and chemical techniques
B)Surgery with anesthesia and vaccines
C)Public health measures and delivery systems
D)Antibiotics and gene therapy
12
Which of the following is a relatively new method of obtaining energy with 30 years of research suggesting promise for the future?
A)Using hydrogen and uranium to generate electricity
B)Burning fossil fuels
C)Using photovoltaic cells to convert sunlight directly to electricity
D)Nuclear fission of the stars
13
All of the following are true of a mixture except:
A)Mixtures have a constant composition
B)Is a combination of two or more substances
C)May be either homogeneous or heterogeneous
D)May be separated by physical means
14
What is the SI unit of mass?
A)Meter
B)Centimeter
C)Gram
D)Kilogram (kg)
15
Which is a useful equivalent?
A)1 liter = 1 decimeter cubed
B)1 meter = 1 centimeter cubed
C)1 cubic centimeter = 1 cubic decimeter
D)1 kilogram = 1 liter
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