|
Circle the answer
|
|
What is the density of a
substance with a mass of 45.00 g and a volume of 26.4 mL???
|
|
|
|
1.70 g/mL?
|
|
|
|
0.59 g/mL?
|
|
|
|
0.587 g/mL?
|
|
|
|
45.0 g/mL?
|
???
|
|
2 points
|
|
QUESTION 9
|
|
Which of the following
matters is a compound???
|
|
|
|
Copper?
|
|
|
|
Water?
|
|
|
|
Saline solution?
|
|
|
|
Air?
|
???
|
|
2 points
|
|
QUESTION 10
|
|
A dose of aspirin of 5.0
milligram per kilogram has been prescribed to reduce the fever of an infant
weighing 8.5 pounds. The number of milligram of aspirin that should be
administered is??
|
|
|
|
53 mg?
|
|
|
|
19 mg?
|
|
|
|
1.6 mg?
|
|
|
|
5.0 mg?
|
???
|
|
2 points
|
|
QUESTION 11
|
|
The number of valence shell
electrons in all noble gases (except helium) is??
|
|
???
|
|
2 points
|
|
QUESTION 12
|
|
The number of electrons in a
neutral atom with 30 protons and 34 neutrons is??
|
|
???
|
|
2 points
|
|
QUESTION 13
|
|
How many electrons is in the
valence shell of a calcium atom???
|
|
???
|
|
2 points
|
|
QUESTION 14
|
|
How many protons, neutrons,
and electrons are in the following isotope, respectively???
|
|
|
|
3, 3, 3?
|
|
|
|
3, 6, 3?
|
|
|
|
6, 3, 6?
|
|
|
|
6, 3, 3?
|
???
|
|
2 points
|
|
QUESTION 15
|
|
What is the ground state of
a hydrogen atom???
|
|
|
|
Three
electrons in the n=1 level?
|
|
|
|
One
electron in the n=2 level?
|
|
|
|
One
electron in the n=1 level?
|
|
|
|
One
electron in the n=1 level and one electron in the n=2 level?
|
???
|
|
2 points
|
|
QUESTION 16
|
|
Which substance would be
present in the greatest concentration during the morning rush hour on a
smoggy day in Los Angeles???
|
|
???
|
|
2 points
|
|
QUESTION 17
|
|
When coal and fuel oil are
burned, what two primary pollutants are formed???
|
|
|
|
SO2
and CO2?
|
|
|
|
HNO3
and H2SO4?
|
|
|
|
CO
and O3?
|
|
|
|
Hydrocarbons
and NO2?
|
???
|
|
2 points
|
|
QUESTION 18
|
|
Why are small particulates
in the atmosphere dangerous to human beings???
|
|
|
|
They
can enter into and lodge in very small crevices of the lungs and cause
concentrated abrasive injury.?
|
|
|
|
They
grind the enamel off of teeth.?
|
|
|
|
They
absorb and concentrate other pollutants.?
|
|
|
|
They
dissolve in rivers and lakes and fill them up.?
|
???
|
|
2 points
|
|
QUESTION 19
|
|
Convert 0.000053% to ppb??
|
|
|
|
53 ppb?
|
|
|
|
530 ppb?
|
|
|
|
5300 ppb?
|
|
|
|
5.3 ppb?
|
???
|
|
2 points
|
|
QUESTION 20
|
|
Magnesium nitride is made up
of magnesium ions and nitride ions. What is the expected formula of magnesium
nitride???
|
|
???
|
|
2 points
|
|
QUESTION 21
|
|
How many nonbonding
electrons are in the water molecule???
|
|
???
|
|
2 points
|
|
QUESTION 22
|
|
How many nonbonding
electrons are in the water molecule???
|
|
???
|
|
2 points
|
|
QUESTION 23
|
|
Which of the following
substances has polar covalent bonds???
|
|
???
|
|
2 points
|
|
QUESTION 24
|
|
What is the charge on an ion
with 7 protons, 7 neutrons, and 10 electrons???
|
|
???
|
|
2 points
|
|
QUESTION 25
|
|
How are carbon dioxide
concentrations determined from thousands of years ago???
|
|
|
|
Analysis
of decayed plant material?
|
|
|
|
Analysis
of ice samples?
|
|
|
|
Analysis
of the atmosphere?
|
|
|
|
Analysis
of the Earths core?
|
???
|
|
2 points
|
|
QUESTION 26
|
|
The highest recorded
temperature on earth was 136°F in El Azizia, Libya. What is this temperature
in Celsius???
|
|
|
|
104 °C?
|
|
|
|
277 °C?
|
|
|
|
58 °C?
|
|
|
|
76 °C?
|
???
|
|
2 points
|
|
QUESTION 27
|
|
How much energy is in a
gamma ray with a frequency of 2.5 x 1020 s-1 (E = hv
where h = 1.58 x 10-34 cal s)??
|
|
|
|
4.0 x 1020 cal?
|
|
|
|
4.0 x 1054 cal?
|
|
|
|
4.0 x 10-20 cal?
|
|
|
|
4.0 x 10-14 cal?
|
???
|
|
2 points
|
|
QUESTION 28
|
|
What is the problem with
increasing amounts of carbon dioxide in the atmosphere???
|
|
|
|
Its
lack of consumption in respiration?
|
|
|
|
A
rise in pH of ocean water?
|
|
|
|
Too
much UV radiation being absorbed?
|
|
|
|
Global
warming?
|
???
|
|
2 points
|
|
QUESTION 29
|
|
What chemical bond is broken
by a photon of light in a typical CFC molecule???
|
|
???
|
|
2 points
|
|
QUESTION 30
|
|
Which type of chemical bond
requires the least amount of energy to break???
|
|
|
|
Single?
|
|
|
|
Double?
|
|
|
|
Triple?
|
|
|
|
Quadruple?
|
???
|
|
2 points
|
|
QUESTION 31
|
|
Approximately how many ozone
molecules can one chlorine atom derived from one CFC molecule react with???
|
|
|
|
1 molecule O3?
|
|
|
|
100 molecules
O3?
|
|
|
|
1000 molecules
O3?
|
|
|
|
100000
molecules O3?
|
???
|
|
2 points
|
|
QUESTION 32
|
|
Which of the following
explains why CFCs are not removed from the atmosphere by rainout???
|
|
|
|
CFCs
are not water solublen water.?
|
|
|
|
CFCs
are chemically inactive in the troposphere?
|
|
|
|
UV
radiation removes them more quickly.?
|
|
|
|
This
is due to both their chemical stability and solubility in water.?
|
???
|
|
2 points
|
|
QUESTION 33
|
|
Which will have the largest
molar mass???
|
|
|
|
1
mole of Ar, argon?
|
|
|
|
1
mole of CO, carbon monoxide?
|
|
|
|
1
mole of N2, nitrogen?
|
|
|
|
1
mole of Sn, tin?
|
???
|
|
2 points
|
|
QUESTION 34
|
|
What numbers are needed to
balance the following equation, respectively? ____CO2 + ____H2O —>
____C6H12O6 + ____O2??
|
|
|
|
1, 1, 1, 1?
|
|
|
|
6, 6, 6, 6?
|
|
|
|
6, 6, 1, 6?
|
|
|
|
6, 1, 1, 6?
|
???
|
|
2 points
|
|
QUESTION 35
|
|
How many atoms are
represented in the formula Ca3(PO4)2???
|
|
???
|
|
2 points
|
|
QUESTION 36
|
|
What is the number of atoms
in 1.0 mol of nitrogen dioxide, NO2???
|
|
|
|
1.8 x 1024 atoms?
|
|
|
|
1.8 x 1023 atoms?
|
|
|
|
2.0 x 1023 atoms?
|
|
|
|
3
atoms?
|
???
|
|
2 points
|
|
QUESTION 37
|
|
The balanced equation for
the decomposition of hydrogen peroxide, H2O2, is given
below. What number of grams of O2 result from 3 . g of hydrogen
peroxide???
|
|
|
|
300. g O2?
|
|
|
|
3 . g O2?
|
|
|
|
320. g O2?
|
|
|
|
338. g O2?
|
???
|
|
2 points
|
|
QUESTION 38
|
|
The strength of an acid is
related to its??
|
|
|
|
Extent
of ionization?
|
|
|
|
Reaction
with a salt?
|
|
|
|
Concentration?
|
|
|
|
Commercial
ranking in the economy?
|
???
|
|
2 points
|
|
QUESTION 39
|
|
What volume (in liters) of 1
M NaOH contains g sodium hydroxide???
|
|
|
|
100 L?
|
|
|
|
1 L?
|
|
|
|
10 L?
|
|
|
|
1000 L?
|
???
|
|
2 points
|
|
QUESTION 40
|
|
What is the pH of a 0.0001 M
HCl solution???
|
|
???
|
|
2 points
|
|
QUESTION 41
|
|
What is the salt formed when
an HCl solution reacts with Mg(OH)2???
|
|
|
|
MgCl2?
|
|
|
|
Mg2Cl?
|
|
|
|
MgCl?
|
|
|
|
Mg2Cl2?
|
???
|
|
2 points
|
|
QUESTION 42
|
|
How many moles of sulfuric
acid, H2SO4(aq) are in 2.0 liters of 18 M H2SO4???
|
|
|
|
9.0 mol?
|
|
|
|
20. mol?
|
|
|
|
36 mol?
|
|
|
|
98 mol?
|
???
|
|
2 points
|
|
QUESTION 43
|
|
In the equation 2 Na(s) + Cl2(g)
—> 2 Na+ + 2 Cl, the oxidizing agent is??
|
|
|
|
Na (s)?
|
|
|
|
Cl2 (g)?
|
|
|
|
Na+?
|
|
|
|
Cl–?
|
???
|
|
2 points
|
|
QUESTION 44
|
|
Identify the reduced species
in the following equation CH4(g) + 2O2(g) —> CO2(g)
+ 2H2O(g)??
|
|
???
|
|
2 points
|
|
QUESTION 45
|
|
In an electrolysis reaction,
oxidation occurs at which electrode???
|
|
|
|
Cathode?
|
|
|
|
Anode?
|
|
|
|
Both
electrodes?
|
|
|
|
Neither
electrode?
|
???
|
|
2 points
|
|
QUESTION 46
|
|
Which of the following is a
free radical???
|
|
|
|
Ozone,
O3?
|
|
|
|
Fluorine,
F2?
|
|
|
|
Chlorine,
Cl2?
|
|
|
|
Nitrogen
dioxide, NO2?
|
???
|
|
2 points
|
|
QUESTION 47
|
|
How much heat is required to
heat 25 g of liquid water from 20 °C to 100 °C??
|
|
|
|
25 cal?
|
|
|
|
1000 cal?
|
|
|
|
2000 cal?
|
|
|
|
1 00 cal?
|
???
|
|
2 points
|
|
QUESTION 48
|
|
The phrase “acid
rain” applies to rain water with a pH of??
|
|
???
|
|
2 points
|
|
QUESTION 49
|
|
Identify the exothermic
process among the following.??
|
|
|
|
Wood
burning?
|
|
|
|
Boiling
water?
|
|
|
|
Melting
ice?
|
|
|
|
100
cal of energy are absorbed?
|
???
|
|
2 points
|
|
QUESTION 50
|
|
Fertilizers such as nitrates
and phosphates are examples of what type of pollutant???
|
|
|
|
Minerals
and chemicals?
|
|
|
|
Infectious
agents?
|
|
|
|
Plant
nutrients?
|
|
|
|
Oxygen-demanding
wastes?
|
|
