Chapter Review
2.044 x 10
- 1.073 x ICY'
d. 2.094 x
39. Evaluate each of the following, and write the answer
to the appropriate number of significant figures.
c. 4.03
10
x 10
c. (3.923x
d.
X 10
140. Evaluate each of the following, and write the answer
to the appropriate number of significant figures.
a. (2.9932 x
x 102 + 1.0032 x 1011
b. [2.34 x 102 + 2.443 x lo -11/(0.0323)
c. (4.38 x 10 52
d. (5.9938x
141. Given that 1 L = 1000 cm3, determine what con-
version factor is appropriate to convert 350 cmß to
liters; to convert 0.200 L to cubic centimeters.
142. Given that 12 months = 1 year,determinewhat conversion factor is appropriate to convert 72 months
to years;to convert 3.5 yearsto months.
143. Perform each of the following conversions, being
sure to set up clearly the appropriate conversion fac-
tor in each case.
a. 8.43 cm to millimeters
b. 2.41 x 102 cm to meters
c. 294.5 nm to centimeters
d. 404.5 m to kilometers
e. 1.445 x 104 m to kilometers
f. 42.2 mm to centimeters
g. 235.3 m to millimeters
h. 903.3 nm to micrometers
144. Perform each of the following conversions, being
sure to set up clearly the appropriate conversion factor(s) ili each case.
d. 2.89 gal to milliliters
a. 908 oz to kilograms
e. 4.48 1b to grams
b. 12.8 L to gallons
f. 550 ml. to quarts
c. 125 mL to quarts
145. The mean distance from the earth to the sun is 9.3 x
107 mi. What is this distance in kilometers? in centimeters?
146. Given that one gross = 144 items, how many pencils
are contained in 6 gross?
147. Convert the following temperatures to kelvins.
e. -175 oc
c.37 oc
b. 25 oc
d. 100 oc
f. 212 oc
148. Carry out the indicated temperature conversions.
a. 175 OF to kelvins
b. 255 K to Celsius degrees
c. —45 OF to Celsius degrees
d. 125 oc to Fahrenheit degrees
149. For the masses and volumes indicated, calculate the
density in grams per cubic cèntimeter.
a. mass
55
b. mass 2.34kg;volume 2.2 m'
c. mass
1.2 1b; volume = 2.1 ft l
d. mass = 4.3 ton; volume 54.2yd'
150. A sample of a liquid solvent has a density of 0.915
g,/mL. What is the mass of 85.5 rnL ot the liquid?
151. An organic solvent has a density of 1.31 g/mL What
volume is occupied by 50.0 g of the liquid?
The mass
152. A solid metal sphere has a volume of 4.2
of the sphere is 155 lb. Find the density of the metal
sphere in grams per cubic centimeter.
153. A sample containing 33.42 g of metal pellets is
poured into a graduated cylinder initially containing
12.7 mL of water, causing the water level in the cylinder to rise to 21.6 ml.. Calculate the density of the
metal.
154. Convert the following temperatures to Fahrenheit
degrees.
b. 273 K
c. -196 oc
d. OK
e. 86 oc
f. -273 oc
155. For each of the following descriptions, identify the
power of 10 being indicated by the prefix in the measurement.
a. The sign on the interstate highway says to tune my
AM radio to 540 kilohertz for traffic information.
b. My new digital camera has a two-gigabyte flash
memory card.
c. The shirt I boughtfor my dad on my European
vacation shows the sleeve length in centimeters.
d. My brother's camcorder records on 8-millimeter
tape cassettes.
156. The "Chemistry in Focus" segment Critical Units! dis-
cusses the importance of unit conversions. Read the
segment and make the proper unit conversionsto
answer the following questions.
a. The Mars Climate Orbiter burned up because it
dipped lower in the Mars atmosphere than
planned. How many miles lower than planned did
it dip?
b. A Canadian jetliner almost ran out of fuel because
someone pumped less fuel into the aircraft than
was thought. How many more pounds of fuel
should have been pumped into the aircraft?
157. Read the "Chemistry in Focus" segment Measurement:
Past, Present,and Future and answer the following
questions.
a. Give three examples of how developing sophisticated measuring devices is useful in our society.
b. Explain how advances in measurement abilities
can be a problem.
158. The "Chemistry in Focus" segment Measurement:
Past, Present, and Future states that hormones can be
detected to a level of 10-8 g/L. Convert this level to
units of pounds per gallon.
234g; volume = 2.2 Cmg
All even-numbered Questions and Problems have answers in the back of this book and solutions in the