Chem R110 - Elementary Chemistry » Spring 2021 » Quiz 2

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Question #1
Which measurement below represents the heaviest mass?
A.   1 pg
B.   1 dg
C.   1 kg
D.   1 Mg
E.   1 mg
Question #2
Subtract: 14.278 m from 106.31 m. The difference expressed in the correct number of significant figures is ___.
A.   92 m
B.   92.03 m
C.   92.0 m
D.   92.032 m
Question #3
When expressed in proper scientific notation the number 0.000034 is ___.
A.   3.4 × 103
B.   3.4 × 10-4
C.   3.4 × 104
D.   3.4 × 10-5
Question #4
Determine the answer to the following equation with correct number of significant figures: (17.103 + 2.03) × 1.02521 = ________
A.   20
B.   19.6153
C.   19.62
D.   None of these
E.   19.6
Question #5
How many significant digits are in the number 1.305 × 104?
A.   1
B.   4
C.   2
D.   3
Question #6
How many zeroes are significant in the number 40400302?
A.   1
B.   2
C.   3
D.   4
Question #7
How many grams are in 1.48 × 107 μg?
A.   14.8
B.   None of these
C.   1.48 × 103 
D.   1.48
Question #8
The temperature of 40.0 °Fahrenheit is equal to which Celsius temperature?
A.   20.0 °C
B.   115 °C
C.   45.0 °C
D.   4.44 °C
Question #9
How many inches are in 25.8 cm?
A.   None of these
B.   10.2
C.   0.1
D.   28.3
Question #10
How many significant figures should be included in the answer to the following calculation? (3.48) (3.6) / 2.470
A.   2
B.   4
C.   1
D.   3
Question #11
A piece of metal has a mass of 86.24 g and a volume of 13.4mL. What is its density?
A.   72.8 g/mL
B.   0.155 g/mL
C.   6.44 g/mL
D.   99.6 g/mL
Question #12
Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with the dimensions of 10.0 in × 4.00 in × 3.00 in.
A.   102
B.   3.80 × 104 
C.   None of these
D.   0.161
Question #13
Convert 12.5 m3 to cm3.
A.   1.25 × 105 cm3
B.   1.25 × 10-3 cm3
C.   1.25 × 107 cm3
D.   1.25 × 103 cm3
Question #14
A sample of nickel oxide contains 35.5% oxygen. Calculate the mass of oxygen present in 146 g of nickel oxide?
A.   52 g
B.   411 g
C.   51.8 g
D.   4.11 g

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