Chem 065 - Introductory General Chemistry » Winter 2024 » Chapter 2 Quiz

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Question #1
The number of significant figures in the measurement of 45.030 mm is
A.   four
B.   three
C.   five
D.   none of these
E.   six
Question #2
Which of the following is the largest unit?
A.   kilometer
B.   micrometer
C.   decimeter
D.   meter
E.   millimeter
Question #3
What is 6.5 m converted to inches? Note 1 in = 2.54 cm
A.   1700 in
B.   39 in
C.   1651 in
D.   260 in
E.   255.9 in
Question #4
What is the answer, with the correct number of decimal places, for this problem? 4.392 g + 102.40 g + 2.51 g =
A.   109.3 g
B.   110 g
C.   109.30 g
D.   109.302 g
E.   109 g
Question #5
Written in scientific notation, 0.000 000 33 is
A.   3.3 × 10-7
B.   3.3 × 108.
C.   3.3 × 107.
D.   3.3 × 10-8
E.   3.3.
Question #6
Round off each of the following to three significant figures 0.0034088
A.   0.00342
B.   0.00343
C.   0.00341
D.   0.0033
E.   0.0034
Question #7
Which one of the following substances will float in gasoline, which has a density of 0.66 g/mL?
A.   table salt (density= 2.16 g/mL)
B.   aluminum (density= 2.70 g/mL
C.   mercury (density=13.6 g/mL)
D.   sugar (density= 1.59 g/mL
E.   balsa wood (density=0.16 g/mL)
Question #8
What is the mass of 53 mL of ethanol, which has a density of 0.79 g/mL?
A.   67 g
B.   53 g
C.   42 g
D.   41.9 g
E.   67.1 g

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