This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering.
001 10.0 points The formula O3 represents
1. a molecule, an element, and a pure sub-stance.
2. an atom, a compound, and a pure sub-stance.
3.a molecule, a compound, and a mixture.
4.an atom, a compound, and a mixture.
5. a molecule, a compound, and a pure sub-stance.
6.a molecule, an element, and a mixture.
7.an atom, an element, and a mixture.
8. an atom, an element, and a pure sub-stance.
002 10.0 points
How many milliliters are in a 67.8 ft3 box?
1.13300 mL
2.2070 mL
3.7150 mL
4.1.92×106 mL
5.0.00239 mL
003 10.0 points
The number 8.314 written in scientific nota-tion becomes
1.83.14×10−2
2.8.314×10−1
3.8.314×101
4.8.314×102
5.8.314×100
6.83.14×10−1
004 10.0 points
You can tell whether a mixture is a solution or a suspension by
1.letting the mixture stand for a while.
2.stirring it.
3.evaporating off the liquid.
4.freezing it.
005 10.0 points
Which instrument would be used to measure the volume of a diamond?
1.graduated cylinder
2.Celsius thermometer
3.triple-beam balance
4.metric ruler
006 10.0 points
A bathroom scale can weigh something up to 200 lbs. The 200 lbs is divided into one pound increments. A boy’s weight falls be-tween 113 and 114 pounds on this scale. How many significant figures can be reported in his weight?
1.4
2.3
3.2
4.5
its, find 0.00147×8.314×7.100.
1.8.677×10−2
2.8.7×102
3.0.087
4.8.68×10−2
008 10.0 points
The Scoville scale is a measurement of the ”spicy heat” of a chili pepper. The number of Scoville heat units (SHU) is really an indicator of how much capsaicin is present in the chili. So could the ”spicy heat” of a pepper be considered a state function?
1. Yes, it fits the definition.
2. No, ”spicy heat” can’t possibly be a state function.
3. Sometimes yes, sometimes no... it would depend on the chili pepper.
009 (part 1 of 4) 10.0 points Consider the graph
0 1 2 3 4 5 6 7 8 0
10 20 30 40 50 60 70 80 90 100 110 120
Number of Antacid Tablets
CO
2
Produced (mL)
How much CO2 gas is produced by each
antacid tablet?
1.15
2.45
3.30
4.75
6.90
010 (part 2 of 4) 10.0 points
How much CO2 gas is produced by four
antacid tablets?
1.75
2.30
3.45
4.90
5.60
6.15
011 (part 3 of 4) 10.0 points
How many antacid tablets did it take to pro-duce 45 mL of CO2gas?
1.4
2.1
3.3
4.5
5.2
6.6
012 (part 4 of 4) 10.0 points
Predict how many antacid tablets it would take to produce 120 mL of CO2 gas.
1.4
2.6
3.8
4.7
6.9
013 10.0 points The ideal gas law states
P V =nRT
If the temperature and n remain constant for two measurements, which of the following is true?
1.T ∝n
2.V ∝T
3.P ∝ 1
T
4.V ∝ 1
T
5.P ∝ 1
V
6.P ∝V
7.T ∝R
8.P ∝T
014 10.0 points
Ifx andy are positive numbers, then y
y x
= x
for allx, y. True or False?
1.True
2.False
015 10.0 points
What is the x-intercept of the straight line having slope 4 andy-intercept 6 ?
1.x-intercept =−3
2 2.x-intercept =−4
3.x-intercept =−2
3
4.x-intercept = 2 3 5.x-intercept =−6
6.x-intercept = 3 2
016 10.0 points
The atomic weight of a newly discovered el-ement is 98.225 amu. It has two naturally occuring isotopes. One isotope has a mass of 96.780 amu. The second isotope has a per-cent abundance of 41.7%. What is the mass of the second isotope?
1.99.670 amu
2.57.265
3.1.445 amu
4.not enough information is given
5.144.500 amu
6.40.960 amu
7.100.245 amu
8.99.259 amu
017 10.0 points
The atomic weight of lithium is 6.941 amu. There are two naturally occurring isotopes of lithium. 6Li has an isotopic mass of 6.0151 amu and 7Li has an isotopic mass of 7.0160 amu. What is the percent abundance of7Li?
1.4.3 percent
2.92.5 percent
3.95.7 percent
4.89.2 percent
018 10.0 points
A hypothetical element has an atomic weight of 89.6932 amu. There are three main isotopes of this element, with mass numbers of 88, 90, and 91. The 91 amu isotope has a 8% abundance. What is the percent abundance of the isotope with the mass number of 88?
1.19.94%
2.80.66%
3.19.64%
4.84.66%
5.19.34%
6.46.00%
7.80.96%
8.81.26%
9.15.34%
019 (part 1 of 2) 10.0 points
Predict the formula for the compound formed by tin and phosphorus.
1.Sn3P4
2.Sn2P3
3.SnP2
4.Sn2P
5.SnP
6.Sn3P
7.None of these
020 (part 2 of 2) 10.0 points
Predict the formula formed by potassium and oxygen.
2.None of these
3.KO2
4.K2O3
5.K3O4
6.K2O
7.KO
021 10.0 points
Predict a stable molecule from the following:
1.He2
2.He+2
3.Ne2
4.Be2
5.None of the above.
022 10.0 points
What would be the simplest formula for the compound formed between boron and oxy-gen?
1.BO2
2.B3O
3.B3O3
4.BO
5.B2O
6.B2O3
7.B2O2
8.BO3
10.B3O2
023 10.0 points
Which of the following is a set of allotropes of the same element?
1.O2, O3
2.aluminum, aluminum oxide
3.water, ice
4.graphite, tungsten carbide
5.NO, NO2, N2O
024 10.0 points
Consider one atom of carbon. Which re-sponse does NOT represent the correct num-ber of indicated atoms to form one molecule of a stable compound with this one atom of carbon?
1.4 H atoms
2.4 S atoms
3.4 Br atoms
4.2 O atoms
5.4 I atoms
025 10.0 points
How many protons are present in80Se2−?
1.47
2.None of these
3.36
4.34
5.80
6.46
7.32
