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Supplemental Test Items to accompany OpenStax Chemistry. Note that not all chapters of OpenStax Chemistry have accompanying test items. Building on the community-oriented nature of OpenStax resources, we invite you to submit items to be considered for future inclusion.
Chapter 01: Essential Ideas
1.A 0.150 kg metallic block measures 25.0 mm in length, 43.0 mm in width, and 19 .0 mm in height. What is the density of the metallic block in g/cm3? (Outcome # 3) (DOK 2)
A.7.34 x 10-6 g/cm3
B.7.34 x 10-3 g/cm3
C.7.34 g/cm3*
2.An object with a mass of 0.255 kg and density of 2.89 g/cm3 measures 34 mm in length and 46 mm in width. What is the height of the object? (Outcome # 3) (DOK 3)
A.5.6 cm*
B.5.6 x 10-2 cm
C.7.2 x 10-4 cm
3.How would you determine the density of an irregular object? (Outcome # 3) (DOK 3)
A.It would be impossible to determine the mass of the object without more information.
B.D = m/v, so measure the mass of the object using a balance. Then to find volume, measure the height, width, and length using an appropriate measuring tool.
C.D = m/v, so measure the mass of the object using a balance. Then to find volume, fill a graduated cylinder with a known amount of water and immerse the object in the water. The amount of displaced water is the volume in cm3 or mL.*
4.What is the base unit for length in the metric system? (Outcome # 6) (DOK 1)
A.m*
B.km
C.mm
5.What is the base unit for mass in the metric system? (Outcome # 6) (DOK 1)
A.kg
B.g*
C.mg
6.What is the base unit for volume in the metric system? (Outcome # 6) (DOK 1)
A.L*
B.mL C.dL
7.It is important that scientists use units that are understood on a global level. These units are referred to as SI units which stands for _____. (Outcome # 6) (DOK 1)
A.standard international units
B.standard intercontinental units
C.international system of units*
8.Convert 18.50 ft to the SI unit for length. (Outcome # 6) (DOK 2)
A.563.9 cm
B.5.639 m*
C.0.005639 km
9.An experimental mouse weighs about 4.41 x 10-2 lbs. What would the weight be in the SI unit for mass? (Outcome # 6) (DOK 2)
A.20.0 g
B.0.0200 kg*
C.20,003 mg
10.Accuracy is defined as how close a measured value comes to a _____. (Outcome # 6) (DOK 1)
A.core value
B.fixed value
C.true value*
11.Precision is defined as how _____ the measured values are to one another. (Outcome # 6) (DOK 1)
A.common
B.reproducible*
C.accurate
12.An experiment requires you to make several measurements. Based on the values
in the table below, what would be the best statement that represents the data set
if the true value is 0.2135? (Outcome # 11) (DOK 2)
Trial ATrial BTrial C
0.213
90.289
30.213
5
0.213
00.321
00.213
4
0.213
30.299
90.371
2
0.213
50.299
80.371
5 A.The measurements in Trial A are accurate and precise, Trial B is neither accurate nor precise, and Trial C is accurate however, not precise.
B.The measurements in Trial A are accurate and precise, Trial B is neither accurate nor precise, and Trial C is precise however, not accurate.
C.The measurements in Trial A are accurate and precise, Trial’s B and C are neither accurate nor precise.*
13.An experiment requires you to make several measurements. Based on the values
in the table below, what would be the best statement that represents the data set
if the true value is 2.73? (Outcome # 11) (DOK 2) (Paired item 1) Trial ATrial BTrial C
2.733.002.77
3.053.032.79
3.092.993.31
2.443.012.05
A.The measurements in Trial B are precise, however, not accurate. Trial’s A and C are neither accurate nor precise.*
B.The measurements in Trial B are accurate, however, not precise. Trial’s A and C are neither accurate nor precise.
C.The measurements in Trial’s A, B, and C are neither accurate nor precise.
14.Which of the following would be considered a chemical change? (Outcome # 9) (DOK 1)
A.a rusting nail*
B.melting ice
C.crushing an aluminum can
15.Which of the following would be considered a physical change? (Outcome # 9) (DOK 1)
A.digesting food
B.burning paper
C.boiling water*
16.A salt water solution is classified as what type of matter? (Outcome # 9) (DOK 1)
A.homogeneous mixture*
B.heterogeneous mixture
C.pure substance
17.How many significant figures are in 0.0000401 kg? (Outcome # 5) (DOK 1)
A.3*
B.7
C.2 18.How many significant figures are in 0.20 L? (Outcome # 5) (DOK 1) (Paired item 1) A.3
B.1
C.2* 19.Express 1.40 x 10-3 L in decimal notation. (Outcome # 5) (DOK 1)
A.0.00140 L*
B.0.0014 L
C.0.001 L
20.What is the answer for the following calculation: (1.249 - 0.0234) x 139.37? (Outcome # 5) (DOK 2)
A.170.812
B.170.8*
C.170.81
21.What is the SI unit for mass? (Outcome # 7) (DOK 1)
A.kilogram*
B.gram
C.milligram
22.What is the SI unit for length? (Outcome # 7) (DOK 1)
A.meter*
B.kilometer
C.millimeter
23.What is the SI unit for temperature? (Outcome # 7) (DOK 1)
A.Celsius
B.Fahrenheit
C.kelvin*
24.How many grams of iron are in 350 mg of iron? (Outcome # 7) (DOK 1)
A.3.50 g
B.0.350 g*
C.35.0 g
25.The prefix milli- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A.103
B.10-3*
C.1/10-3
26.The prefix kilo- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
A.103*
B.10-3
C.1/103
27.The prefix nano- in the metric system represents a factor of _____. (Outcome # 7) (DOK 1)
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