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Round off the following measurement to three significant digits: 14,546 cm.


A) 145 cm
B) 146 cm
C) 14,500 cm
D) 14,600 cm
E) 15,000 cm

F) A) and D)
G) C) and D)

Correct Answer

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Subtract 10.0 mL from 45.65 mL and round off the answer.


A) 35 mL
B) 35.6 mL
C) 35.65 mL
D) 35.7 mL
E) 36 mL

F) B) and E)
G) B) and C)

Correct Answer

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Round off the following measurement to three significant digits: 35.35 mL.


A) 35.0 mL
B) 35.3 mL
C) 35.30 mL
D) 35.4 mL
E) 35.40 mL

F) A) and B)
G) B) and D)

Correct Answer

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Round off the following measurement to three significant digits: 19.945 g.


A) 19.0 g
B) 19.9 g
C) 19.950 g
D) 19.945 g
E) 20.0 g

F) D) and E)
G) C) and D)

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An aluminum atom has a mass of 0.000 000 000 000 000 000 000 0448 g.Express the mass in scientific notation.


A) 4.48 x 1023 g
B) 4.48 x 1022 g
C) 4.48 x 10-22 g
D) 4.48 x 10-23 g
E) 4.48 x 10-24 g

F) None of the above
G) A) and B)

Correct Answer

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Express the exponential number 1.11 x 104 as an ordinary number.


A) 0.000 111
B) 0.000 011 1
C) 11,100
D) 111,000
E) none of the above

F) A) and C)
G) A) and D)

Correct Answer

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Add 5.0 x 104 to 2.0 x 103 and express the answer in scientific notation.


A) 1.0 x 103
B) 2.5 x 103
C) 2.5 x 104
D) 5.2 x 103
E) 5.2 x 104

F) A) and D)
G) All of the above

Correct Answer

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Which of the following is the best estimate for the volume corresponding to 20 drops from an eyedropper?


A) 1 mL
B) 10 mL
C) 20 mL
D) 50 mL
E) 100 mL

F) A) and B)
G) C) and D)

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Subtract 6.7 x 10-3 from 6.6 x 10-2 and express the answer in scientific notation.


A) 5.9 x 10-1
B) 5.9 x 10-2
C) 5.9 x 10-3
D) 5.9 x 101
E) 5.9 x 102

F) All of the above
G) B) and E)

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A lithium atom has a radius of 0.000 000 015 2 cm.Express the atomic radius in scientific notation.


A) 1.52 x 10-9 cm
B) 1.52 x 10-8 cm
C) 1.52 x 10-7 cm
D) 1.52 x 107 cm
E) 1.52 x 108 cm

F) D) and E)
G) All of the above

Correct Answer

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Express the exponential number 5.15 x 105 as an ordinary number.


A) 0.000 515
B) 0.000 051 5
C) 51,500
D) 515,000
E) none of the above

F) A) and B)
G) A) and C)

Correct Answer

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How many significant digits are in the mass measurement 0.050 g?


A) 1
B) 2
C) 3
D) 4
E) none of the above

F) A) and B)
G) B) and E)

Correct Answer

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How many significant digits are in the mass measurement 20,000 g?


A) 1
B) 2
C) 3
D) 4
E) none of the above

F) B) and C)
G) C) and D)

Correct Answer

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Multiply 1.50 cm by 1.05 cm by 1.00 cm and round off the answer.


A) 1.575 cm3
B) 1.58 cm3
C) 1.6 cm3
D) 1.60 cm3
E) 2 cm3

F) B) and D)
G) C) and E)

Correct Answer

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Add 250.0 mL to 5.00 mL and round off the answer.


A) 250 mL
B) 255 mL
C) 255.0 mL
D) 255.00 mL
E) 256 mL

F) A) and B)
G) B) and E)

Correct Answer

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How many significant digits are in the time measurement 60.010 s?


A) 1
B) 2
C) 3
D) 4
E) none of the above

F) A) and B)
G) D) and E)

Correct Answer

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Express the exponential number 2.25 x 10-4 as an ordinary number.


A) 0.000 225
B) 0.000 022 5
C) 22,500
D) 225,000
E) none of the above

F) A) and B)
G) A) and C)

Correct Answer

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A carbon atom has a radius of 7.7 x 10-9 cm.Express the atomic radius as an ordinary number.


A) 0.000 000 000 077 cm
B) 0.000 000 000 77 cm
C) 0.000 000 007 7 cm
D) 0.000 000 077 cm
E) 0.000 000 77 cm

F) C) and E)
G) A) and B)

Correct Answer

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Multiply 2.505 cm by 1.75 cm by 1.0 cm and round off the answer.


A) 4 cm3
B) 4.4 cm3
C) 4.38 cm3
D) 4.384 cm3
E) 4.0 cm3

F) A) and E)
G) C) and E)

Correct Answer

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Multiply 1.05 cm times 2.2 cm and round off the answer.


A) 2 cm2
B) 2.0 cm2
C) 2.3 cm2
D) 2.31 cm2
E) 3 cm2

F) C) and E)
G) D) and E)

Correct Answer

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