Question 1
2.5 out of 2.5 points
What term is used to describe a compound that contains water molecules incorporated in its
structure?
Selected Answer:
B.
hydrate
Answers:
A.
condensation
B.
aqueous
C.
hydrate
D.
None of these answers are correct
E.
condensate
Question 2
0 out of 2.5 points
The density of hydrogen gas is lower than that of uranium hexafluoride (UF6) gas if both are
measured at STP.
Selected Answer:
False
Answers:
True
False
Question 3
2.5 out of 2.5 points
Consider 1.00 L of air in a patient's lungs at 37.0°C and 1.00 atm pressure. What volume would
this air occupy if it were at 25.0°C under a pressure of 5.00 × 102 atm (a typical pressure in a
compressed air cylinder)?
Selected Answer:
D.
1.92 × 10−3 L
Answers:
A.
480 L
B.
None of these answers are correct.
C.
1.35 × 10−3 L
D.
1.92 × 10−3 L
E.
374 L
Question 4
2.5 out of 2.5 points
Which statement about chemical bonds is FALSE?
Selected
Answer:
Answers:
C.
A nonpolar covalent bond is one in which electrons are not shared equally
between the atoms.
A.
The attraction between oppositely charged ions results in an ionic bond.
B.
A nonpolar covalent bond is one in which electrons are not shared equally
between the atoms.
C.
A bond dipole is the separation of charge that results when atoms sharing
electrons have different electronegativity values.
D.
The sharing of electrons between two nonmetals results in a covalent bond.
E.
The electrons in covalent bonds may be shared equally or unequally between
the atoms.
Question 5
2.5 out of 2.5 points
Increasing the pressure of a gas over a solution increases the solubility of the gas in the
solution. This is an example corresponding to which law?
Selected Answer:
B.
Henry's Law
Answers:
A.
Raoult's Law
B.
Henry's Law
C.
Dalton's Law
D.
None of these answers are correct.
E.
Tyndall's Law
Question 6
2.5 out of 2.5 points
Which statement concerning atoms is FALSE?
Selected
Answer:
Answers:
C.
The mass number of an atom is the sum of the number of protons, neutrons,
and electrons it contains.
A.
The nucleus of an atom is the heaviest part of the atom.
B.
The nucleus of an atom contains its protons and neutrons, and is positively
charged.
C.
The atomic number of an atom is the number of protons it contains.
D.
The mass number of an atom is the sum of the number of protons, neutrons,
and electrons it contains.
E.
Electrons reside outside the nucleus in what is called the electron cloud.
Question 7
2.5 out of 2.5 points
Colligative properties depend only on the concentration of solute particles, not on their
identity.
Selected Answer:
True
Answers:
True
False
Question 8
2.5 out of 2.5 points
Sarin is a nerve gas that was previously used as a chemical weapon. Considering the physical
properties of sarin shown in the table, which statement about sarin is FALSE?
Melting point
–56°C
Boiling point
158°C
Selected Answer:
C.
A sample of sarin at 100°C exists as a gas.
Answers:
A.
A sample of sarin at 0°C exists as a liquid.
B.
A sample of sarin at 170°C exists as a gas.
C.
A sample of sarin at 100°C exists as a gas.
D.
A sample of sarin at -100°C exists as a solid.
E.
A sample of sarin at room temperature (22°C) exists as a liquid.
Question 9
2.5 out of 2.5 points
Choose the best classification of the reaction represented by the following equation:
MgO(s) + CO2(g) → MgCO3(s)
Selected Answer:
C.
combination
Answers:
A.
double-replacement
B.
decomposition
C.
combination
D.
single-replacement
E.
None of these answers are correct
Question 10
2.5 out of 2.5 points
What statement about the ammonia molecule, NH3, is FALSE?
Selected Answer:
E.
The molecule itself is not polar.
Answers:
A.
The molecule has a trigonal pyramidal shape.
B.
The pull of the electrons in the N–H bonds is toward the nitrogen atom.
C.
The molecule itself is not polar.
D.
The molecule contains three polar bonds.
E.
The nitrogen atom has one nonbonding pair of electrons.
Question 11
2.5 out of 2.5 points
Considering the electronegativity values indicated in the table, which covalent bond is the most
polar?
C
Cl
F
O
N
H
2.5
3.0
4.0
3.5
3.0
2.1
Selected Answer:
B.
H–F
Answers:
A.
F–F
B.
Cl–F
C.
C–H
D.
N–O
E.
H–F
Question 12
2.5 out of 2.5 points
Six electrons shared between two atoms corresponds to a triple bond.
Selected Answer:
True
Answers:
True
False
Question 13
2.5 out of 2.5 points
According to the laws of the conservation of matter, the number of moles of reactant
molecules must equal the number of moles of product molecules in a balanced equation.
Selected Answer:
Answers:
False
True
False
Question 14
2.5 out of 2.5 points
Which statement about general bonding characteristics is FALSE?
Selected
Answer:
Answers:
D.
A triple bond is longer than a single bond.
A.
Bond energy is the amount of energy required to break a bond holding two
atoms together.
B.
Bond length is the distance of separation of two nuclei in a covalent bond.
C.
A triple bond is longer than a single bond.
D.
Triple bonds have higher bond energies than double bonds.
E.
Single bonds are easier to break than double bonds.
Question 15
2.5 out of 2.5 points
The ions formed from Group VI A atoms have charges of 2+.
Selected Answer:
Answers:
False
True
False
Question 16
2.5 out of 2.5 points
All atoms of a particular element have identical physical properties.
Selected Answer:
Answers:
False
True
False
Question 17
2.5 out of 2.5 points
A sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this
sample?
Selected Answer:
C.
None of these answers are correct
Answers:
A.
0.767 g
B.
558 g
C.
7.85 × 1023g
D.
None of these answers are correct
E.
1.08 × 1021 g
Question 18
2.5 out of 2.5 points
Boyle's Law states that the volume of a gas varies directly with the absolute temperature.
Selected Answer:
Answers:
False
True
False
Question 19
2.5 out of 2.5 points
Ionic solids are amorphous.
Selected Answer:
Answers:
False
True
False
Question 20
2.5 out of 2.5 points
A solution that is 1 ppm contains more dissolved solute than one that is 1 ppt.
Selected Answer:
Answers:
False
True
False
Question 21
2.5 out of 2.5 points
One mole of oxygen gas contains 6.022 × 1023 atoms.
Selected Answer:
Answers:
False
True
False
Question 22
2.5 out of 2.5 points
There are seven valence electrons in a chloride anion.
Selected Answer:
Answers:
False
True
False
Question 23
2.5 out of 2.5 points
How many milliliters of 12.0 M HCl are needed to prepare 250.0 mL of 2.50 M HCl solution?
Selected Answer:
D.
52.1 mL
Answers:
A.
12.0 mL
B.
25.0 mL
C.
None of these answers are correct.
D.
52.1 mL
E.
2.50 mL
Question 24
2.5 out of 2.5 points
Usually, as temperature increases, viscosity of a liquid decreases.
Selected Answer:
True
Answers:
True
False
Question 25
2.5 out of 2.5 points
There are eight hydrogen atoms in a molecule of ammonium sulfate.
Selected Answer:
True
Answers:
True
False
Question 26
2.5 out of 2.5 points
Which process depicts a physical change?
Selected Answer:
Answers:
D.
A.
B.
None of these processes depicts a physical change.
C.
D.
E.
Question 27
2.5 out of 2.5 points
Which of the following numbers has only one significant figure?
Selected Answer:
E.
0.003
Answers:
A.
0.003
B.
All of these answers are correct.
C.
3.00
D.
30.0
E.
3.0 × 101
Question 28
2.5 out of 2.5 points
If the density of carbon tetrachloride is 1.59 g/mL, what is the volume in L, of 2.37 kg of carbon
tetrachloride?
Selected Answer:
E.
1.49 L
Answers:
A.
None of these answers are correct.
B.
0.378 L
C.
2.65 L
D.
6.69 L
E.
1.49 L
Question 29
2.5 out of 2.5 points
A patient requires 100.0 g of glucose in the next 12 hours. What volume of a 5.0% (m/V)
glucose solution should be administered?
Selected Answer:
B.
None of these answers are correct.
Answers:
A.
5.0 L
B.
200 mL
C.
5 mL
D.
None of these answers are correct.
E.
20 L
Question 30
2.5 out of 2.5 points
How can pure water be made to boil at a temperature below 100°C?
Selected Answer:
D.
decrease the pressure below 1 atm
Answers:
A.
decrease the volume of water
B.
None of these answers are correct
C.
increase the volume of water
D.
decrease the pressure below 1 atm
E.
increase the pressure above 1 atm
Question 31
2.5 out of 2.5 points
The halogens, Group VII A, tend to have the lowest ionization energies of any group in the
periodic table.
Selected Answer:
Answers:
False
True
False
Question 32
2.5 out of 2.5 points
An aqueous solution containing a nonvolatile solute will boil above 100°C at 1 atm pressure.
Selected Answer:
True
Answers:
True
False
Question 33
2.5 out of 2.5 points
One gram of gold (atomic mass 197 amu) contains more atoms than one gram of copper
(atomic mass 63.55 amu).
Selected Answer:
Answers:
False
True
False
Question 34
2.5 out of 2.5 points
According to Boyle's Law, P2 = P1 x V1 / V2
Selected Answer:
True
Answers:
True
False
Question 35
2.5 out of 2.5 points
At 100°C, which gas sample exerts the greatest pressure?
Selected Answer:
A.
A
Answers:
A.
A
B.
B
C.
C
D.
D
E.
They would all exert the same pressure.
Question 36
2.5 out of 2.5 points
What property of light is defined by the distance between identical points on adjacent waves?
Selected Answer:
C.
wavelength
Answers:
A.
energy
B.
None of these answers are correct.
C.
wavelength
D.
amplitude
E.
speed
Question 37
0 out of 2.5 points
The terms mass and weight are identical on the earth.
Selected Answer:
Answers:
True
True
False
Question 38
2.5 out of 2.5 points
0.5 mol of oxygen gas can react with excess hydrogen gas to form 1.0 mol of water.
Selected Answer:
True
Answers:
True
False
Question 39
2.5 out of 2.5 points
Complete combustion of a hydrocarbon compound in oxygen produces carbon dioxide and
hydrogen.
Selected Answer:
Answers:
False
True
False
Question 40
2.5 out of 2.5 points
What Kelvin temperature corresponds to 98.6°F?
Selected Answer:
A.
310. K
Answers:
A.
None of these answers are correct.
B.
37.0 K
C.
13.1 K
D.
310. K
E.
31.0 K
Tuesday, January 28, 2014 5:19:47 PM EST