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Chemistry Ch.3 Review
Test Description: Review of Ch.3
Instructions: Answer all questions to get your test result.
1) What is the closeness to a true value?
A
precision
B
absolute zero
C
accuracy
D
weight
2) The diameter of a carbon atom is 0.000000874 m. What is this number in scientific notation?
A
8.74 x 10^-7
B
87.4 x 10^6
C
8.74 x 10^7
D
87.4 x 10^-6
3) What is the result of adding 4.5 x10^3 and 2.7 x 10^2?
A
3.15 x 10^2
B
4.77 x 10^3
C
4.77 x 10^2
D
3.15 x 10^3
4) Which of the following measurements contains two significant figures?
A
0.00067 L
B
0.00607 L
C
0.00600 L
D
0.00670 L
5) How many significant figures are in the measurement 54,500 mg?
A
3
B
5
C
4
D
2
6) Express the sum of 8.79 m and 6.0 m using the correct number of significant figures.
A
none of the choices
B
14.79 m
C
15
D
14.8 m
7) Which of the following volumes is the smallest?
A
one deciliter
B
one microliter
C
one liter
D
one milliliter
8) What is the temperature -48 degrees Celsius in kelvins?
A
none of the choices
B
-225 K
C
225 K
D
321 K
9) What is the quantity 0.0097 meters expressed in centimeters?
A
0.97 cm
B
97 cm
C
0.097 cm
D
9.7 cm
10) Density is found by dividing __________.
A
volume by mass
B
area by mass
C
mass by area
D
mass by volume
11) What is the density of an object having a mass of 7.2 g and a volume of 34 mL?
A
4.7 g/mL
B
0.21 g/mL
C
none of above
D
244.8 g/mL
12) Convert 342 L to gallons.
A
1450.1 gal
B
90.6 gal
C
none of the choices
D
80.7 gal
13) If you are traveling at 85 miles per hour, how fast are you traveling in meters per second?
A
124.7 m/s
B
none of the choices
C
136787.6 m/s
D
38 m/s
14) The quantity of matter an object contains is ________________.
A
volume
B
mass
C
none of the choices
D
weight
15) The SI scale for temperature is _________________.
A
none of the choices
B
Kelvin
C
Fahrenheit
D
Celsius
16) The force of gravity on an object is called ________________.
A
weight
B
mass
C
volume
D
none of the choices
17) Express 52,600 km in scientific notation.
A
5.26 x 10^4
B
5.26 x 10^-4
C
52.6 x 10^-3
D
52.6 x 10^3
18) What is the result of multiplying 3.4 x 10^9 by 4.3 x 10^-6?
A
1.5 x 10^4
B
14.6 x 10^3
C
14.6 x 10^14
D
1.5 x 10^15
19) Which group of measurements is the most precise?
A
none of the choices
B
2.0 g, 3.0 g, 4.0 g
C
2 g, 2.5 g, 3 g
D
2 g, 3 g, 4 g
20) What is the measurement 233.008 mm rounded off to four significant digits?
A
233 mm
B
230 mm
C
233.0 mm
D
233.01 mm
*select an answer for all questions
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