Chapter 3 Review Sheet Name____________________________________
Write the number of
significant figures in the blank.
1._____
2304 4._____ 0.02340 7._____ 150010 10._____ 9.760
2._____
2340 5._____ 2.603 8._____ 1.5 x 10^{6} 11._____ 0.00340
3._____
2.340 6._____ 150000 9._____ 2.40 x10^{3} 12._____ 105600
Round the
following numbers to 3 significant figures.
13.____________
1844863 15.____________ 0.0067987 17.____________ 2503
14.____________
4 16.____________
6.8578 18.____________ 30409
Answer to the following with
the correct number of significant figures. Circle your answer
19. 6.35 + 41.487 = 20.
23.339  16.1 =
21. 6.8 x 10^{5 }+ 3.52 x 10^{5} =^{ }22. 3.2 x 10^{3 } 7.9 x 10^{4} =^{}
23. 593 x 20 = 24.
3210 x 460 =
25. _{} 25.
_{}
Using
different rulers, Bruce and Pete each measure the length of the same object
three times.
26. Bruce’s three
measurements are 19 cm, 20 cm, and 22 cm. Calculate
the average value of his measurements and express the answer with the correct
number of significant figures.
27. Pete’s three measurements
are 20.9 cm, 21.0 cm, and 21.0 cm. Calculate the
average value of his measurements and express the answer with the correct
number of significant figures.
28. Whose measurements are
more precise?
29. The actual length of the
object is 20.0 cm. Whose measurements are more
accurate?
30. What is the error of
Pete’s average measurement?
31. What is the percent error
of Pete’s average measurement?
Complete
the following tables
Quantity measured 
Base unit 
Symbol 

Prefix 
Abbreviation 
Meaning 
Length 



milli 


Mass 




k 



L 

centi 


Temperature 







degree Celsius 




1,000,000,000 times smaller 
Energy 








cal 




Problems. Answer the following questions. Show your work,
include the units, and use the correct number of significant figures.
32.
A piece of metal has a mass of 46.7 g and a volume of
3.7 mL. What is its density?
33.
520 mL of gasoline has a mass of 473 g. What is its density?
34.
What is the density of a block of wood with the following dimensions
Length 15.24 cm
Width 6.23
cm
Height 3.56
cm
Mass 253 g
35.
The density of a piece of metal is determined by the water displacement method.
The metal had a mass of 23.47 g. A graduated cylinder was filled with 27.3 mL
of water and after the metal was added the volume was 33.7 mL. What is the
density?
36.
A chemical reaction takes place at 20°C. What is this temperature in Kelvins?
37.
A typical refrigerator keeps food at 277 K. What is this temperature in degrees
Celsius?
1
L = 1.057
qt 1
gram = 0.0353 oz 1
kg = 2.20 lbs 1
inch = 2.54 cm
38.
How many mL are in 0.037 quarts?
39.
How many micrograms are in 6.8 x 10^{7} ounces?
40.
Calculate the length in km of a sign 25.0 inches long.
41.
Find the mass in grams of 327 mL liters of Al. The density of Al is 2.70 g/cm^{3}.
42.
Convert the density of Al to pounds/quart. The density of Al is 2.70 g/cm^{3}.
43.
A molecule is traveling at a speed of 420 meters per second. What is its speed
in miles per hour?