Chemistry: Matter and Change

Section 2: Scientific Notation and Dimensional Analysis

Self Check Quizzes

1
Which of the following numbers is equal to 2.70 x 10-4?
A)0.00027
B)0.675
C)27 x 10-3
D)270
2
How many milliliters are there in 1.0 microliter?
A)1.0 x 10-1 mL
B)1.0 x 10-2 mL
C)1.0 x 10-3 mL
D)1.0 x 10-4 mL
3
Dimensional analysis is a method of problem-solving that focuses on ________ .
A)units
B)error
C)accuracy
D)precision
4
Use the conversion factor above to find the meters in 2.7 x 103 kilometers.

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A)2.7 x 105 m
B)2.7 x 10-3 m
C)2.7 m
D)2.7 x 106 m
5
Which of the following conversion factors would be most useful in converting miles per gallon to kilometers per liter?
A)1 gallon/4 quarts
B)1 liter/1000 ml
C)1 mile/0.62 km
D)1 000 m/1 km
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