Why are many drugs administered as salts rather than as the corresponding neutral
compounds?
A. Salts have greater water solubility and stability than the neutral compound.
B. As a general rule, salts are more active than the neutral compounds.
C. Salts are generally liquid and therefore more active than the neutral compounds.
D. The salts are less expensive to produce than the corresponding neutral compounds.
This symbol is an example of the coding symbols found on packaging materials.
These symbols let consumers know
A. how the plastic was made.
B. how to recycle the package.
C. if the plastic is dangerous.
D. the intended use of the material.
Which conclusion was considered “very likely” in the 2007 report of the
Intergovernmental Panel on Climate Change?
A. Human-caused emissions are the main factor causing warming since 1950.
B. The observed warming of the past 100 years is due solely to climate variability.
C. The Arctic Sea ice thickness decreased approximately 40% during late summer/early
fall.
D. Summer droughts have increased.
What, approximately,is the highest concentration of CO2 measured in the Earth’s
atmosphere in modern times?
A. 4000 ppm
B. 400 ppm
C. 40 ppm
D. 4.0 ppm
Single bonds, double bonds, and triple bonds
A. have 1, 2, and 3 shared electrons, respectively.
B. have 2, 4, and 6 shared electrons, respectively.
C. have 3, 6, and 9 shared electrons, respectively.
D. are only possible between carbon atoms.
If the average temperature of earth is currently 15.0C, what does the NOAA model (the
line in the graph) predict for the average global temperature in 2080?
A. 2.4C
B. 12.6C
C. 15.0C
D. 17.4C
Which of the following are ways that aerosols mayaffect climate?
A. Scattering incoming radiation
B. Nucleation ofclouds
C. Absorbing incoming radiation
D. All of the above
What herb is reported to have mood-elevating activity?
A. chamomile
B. ginko biloba
C. lemon balm
D. St. John’s wort
If a snack cake contains 450 food Calories and Dr. Wattenburger is able to burn 250
Calories by running for one-half an hour, how long must she run to completely burn off
the snack cake?
A. 54 minutes
B. 18 minutes
C. 1.21 hours
D. You can’t tell
Wavelength is the
A. number of waves passing a fixed point in one second.
B. height of the wave.
C. distance between successive peaks in a wave.
D. distance between a peak of one wave and the next trough.
Most high-level nuclear waste in the United States is currently
5-21-2013
A. sealed deep within the Earth.
B. encased in glass and buried near the surface.
C. sealed at the sites where it was produced.
D. stored at breeder reactors waiting for reprocessing.
Electronegativity30-20
A. is a measure of an atom’s attraction for an electron in a chemical bond.
B. is the total negative charge on a polyatomic anion.
C. is the same for all of the elements in a family or group.
D. decreases from left to right across a period on the periodic table.
Identify possible consequences of global warming.
I. A rise in sea level
II. An increase in average relative humidity
III. An increase in forest growth in the Northern Hemisphere
IV. A weakening of ocean currents
A. I and III only
B. I and IV only
C. I, II, and IV only
D. I, II, III, and IV
This symbol is found on the bottom of a Coke bottle. What does the number
mean?
A. The bottle may be recycled because it is made from PET.
B. The bottle can not be recycled because it is made from PET.
C. The bottle may be recycled because it is made from HDPE.
D. The bottle can not be recycled because it is made from HDPE.
The most numerous of the elements are the
A. metals.
B. non metals.
C. metalloids.
D. noble gases.
Which compound is insoluble in water?
A. sodium carbonate
B. potassium nitrate
C. ammonium chloride
D. calcium carbonate
Soft lignite (brown coal) is the lowest grade of coal. Since it has undergone the least
change since burial, its chemical compositionand hence its heat of combustionis most
similar to that of
A. natural gas.
B. petroleum.
C. water.
D. wood.
The pH of lemon juice is approximately 2.40. At this pH, the hydronium ion
concentration is closest to which concentration?
A. 2.5 1012 M
B. 4.0 103 M
C. 0.38 M
D. 5.6 104 M
A NiCd battery uses nickel and cadmium to produce a potential difference. Using these
equations, answer the following questions.
I. 2NiO(OH) (s) + 2H2O (l) + 2 e– → 2Ni(OH)2(s) + 2 OH (aq)
II. Cd (s) + 2OH (aq) → Cd(OH)2 (s) + 2e
III. Cd (s) + 2NiO(OH) (s) + 2 H2O (l) → 2 Ni(OH)2(s) + Cd(OH)2(s)
Which equation best represents the reduction half-reaction?
A. I
B. II
C. III
D. I and II
Which of these incorrectly pairs a hormone with its function?
A. thyroxinregulates metabolism
B. insulinenables the body to use glucose (blood sugar) for energy
C. adrenaline (epinephrine)prepares the body to “fight or flee”
D. progesteronecontrols muscle mass
Which of the following is usually consumed in a breeder reactor?
A. Pu-239
B. U-235
C. C-14
D. U-238
This pie chart gives the composition by weight of municipal solid waste (MSW) before
recycling in 2008.
Which of the following statements is not true?
A. There is about 2.6 times more paper waste than plastic waste.
B. Plastic waste is more than the wood and glass waste combined.
C. Plastic waste and food scraps are almost the same.
D. The plastic and paper waste combined account for more than half the MSW.
Valine and lysine are both amino acids. Structurally how could you distinguish between
them?
A. Valine has an amino group, lysine does not.
B. Lysine has an acid group, valine does not.
C. Valine and lysine have different side chains.
D. Valine is an essential amino acid, lysine is not.
Consider the following equation that describes the complete combustion of propane,
C3H8.
The bond energies are: C H 416 kJ/mol; C C 356 kJ/mol; O O 498 kJ/mol; C O
803 kJ/mol; H O 467 kJ/mol. Which is the total amount of energy required to break
all of the bonds in propane?
A. 712 kJ/mol
B. 3328 kJ/mol
C. 4040 kJ/mol
D. 4396 kJ/mol
On a Periodic Table, the columns of elements with similar properties are
A. periods.
B. groups.
C. rows.
D. metals.
In what year will all production and importation of HCFCs end in the United States?
A. 2012
B. 2020
C. 2030
D. 2015
Which reaction represents an acid-base neutralization reaction?
A. HNO2 + H2O → H3O+ + NO2
B. NaOH + H2O → H3O+ + NaO
C. Ba(OH)2 + 2LiCl → BaCl2 + 2LiOH
D. Be(OH)2 + H2SO4 → BeSO4 + 2H2O
Calculate the mass of CO2 produced by the combustion of a tank of gasoline. Assume
the mass of gasoline is 46.0 kg and that gasoline is pure octane (C8H18);
A. 142 kg
B. 17.8 kg
C. 32.3 kg
D. 46.0 kg
Polystyrene is used to make
A. foam coffee cups and CD cases.
B. garbage bags and CDs.
C. shoes and garden hoses.
D. cell phones and contact lenses.
Combustion is a chemical process in which a fuel combines with______ to release
energy and form products.
A. nitrogen
B. oxygen
C. methane
D. hydrogen
The pH of rain water falling through an unpolluted atmosphere is closest to:
A. 4.7
B. 5.4
C. 7.0
D. 8.7
Which reactive nitrogen compound is produced using the Haber-Bosch process?
A. NaNO3
B. KNO3
C. NH3
D. NO2