Practice Problems: Significant Figures ~ Scientific ...
[Pages:1]Practice Problems: Significant Figures ~ Scientific Notation ~ Unit Conversions
1. Without changing the number of significant figures, express each of the following values in scientific notation. Within the parentheses, state how many significant figures are in that value.
a) 123,430.0 _______________ ( )
b) 33375
_______________ ( )
c) 506.43
_______________ ( )
d) 0.0100
_______________ ( )
e) 0.03000111 _______________ ( )
f) 12.34 _______________ ( ) g) 0.0007 _______________ ( ) h) 8677.5 _______________ ( ) i) 350.053 _______________ ( ) j) 0.000070 _______________ ( )
2. Perform the mathematical operation indicated. Express each answer with the appropriate number of significant figures/decimal places.
a) 0.3133 x 3.91 x 3.200 x 444
=
b) (0.0072) (4.022 x 103)
=
(9.03 x 102)
c) (1.23 x 104) (1.90 x 10-3)
=
(0.033) (5.00 x 102)
d) 44.79 - 2.3 - 0.0045
=
e) 234.56 + 1.11 + (3.2 x 102)
=
f) 123 + 33.0033 + (2.3 x 10-1) - (7.900 x 103) =
g) (5.004 x 101) (-1.314 x 10-3) = (5.89 x 107) (6.2 x 10-3)
3. Work the following unit conversions. a) 5.6 x 101 mL to quarts
b) 98.76 inches to m c) 7.7 x 101 ?m to inches
d) 1.234 kg to milligrams
e) 5432.6 micrograms to mg
f) 123.8 micrometers to cm
g) 1.25 grams/mL to kg/L
C. Graham Brittain
9/3/2007
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