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37. What is 0.000000027 expressed in
scientific notation?
A) 2.7
×
10
8
B) 2.7 x 10
–7
C) 27 x 10
–9
D) 2.7 x
10
–8
38. What is 356 expressed in scientific
notation?
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View Full Document 39. What is 1.52 x 10
–2
expressed as a
decimal?
40. What is 7.78 x 10
–8
?
41. For which of the following calculations is
9.9
×
10
10
the correct answer?
A) 145.75 + (2.3
×
10
–1
)
B) 79,500 ÷ (2.5
×
10
2
)
C) (7.0
×
10
–3
) – (8.0
×
10
–4
)
D) (1.0
×
10
4
)
×
(9.9
×
10
6
)
42. For which of the following calculations is
1.14
×
10
10
the correct answer?
A) 0.0095 + (8.5
×
10
–3
)
B) 653 ÷ (5.75
×
10
–8
)
C) 850,000 – (9.0
×
10
5
)
D) (3.63
×
10
3
)
×
(3.6
×
10
6
)
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View Full Document 43. What is the correct number of significant
figures in each of the following?
A) 4867 mi
B) 56 mL
C) 60,104 ton
D) 0.00003 cm
44. How many significant figures are there in
0.006 L?
A) 1
B) 2
C) 3
D) 4
45. How many significant figures are there in
605.5 cm
2
?
A) 1
B) 2
C) 3
D) 4
46. What is 5.6792 m + 0.6 m + 4.33 m
expressed in the correct units with the correct
number of significant figures?
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This note was uploaded on 10/11/2010 for the course CHE 201 taught by Professor Li during the Fall '10 term at Acadia.
 Fall '10
 Li
 Chemistry

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