Question 1
What term is used to describe a compound that contains water molecules incorporated in its
structure?
Answers: A. condensation
B. aqueous
C. hydrate
D. None of these answers are correct
E. condensate
--------------------Question 2
The density of hydrogen gas is lower than that of uranium hexafluoride (UF6) gas if both are
measured at STP.
Answers: True
False
Question 3
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)?
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
ANSWER: D
------------------------------------Question 4
Which statement about chemical bonds is FALSE?
Answers: 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.
ANSWER: B
------------------------Question 5
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?
Answers: A. Raoult's Law
B. Henry's Law
C. Dalton's Law
D. None of these answers are correct.
E. Tyndall's Law
ANSWER: B
Question 6
Which statement concerning atoms is FALSE?
Answers: 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.
ANSWER: D
Question 7
Colligative properties depend only on the concentration of solute particles, not on their identity.
Answers:
True
False
ANSWER: True
Question 8
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
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.
ANSWER: C
Question 9
Choose the best classification of the reaction represented by the following equation:
MgO(s) + CO2(g) → MgCO3(s)
Answers:
A. double-replacement
B. decomposition
C. combination
D. single-replacement
E. None of these answers are correct
ANSWER: C
Question 10
What statement about the ammonia molecule, NH3, is FALSE?
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.
ANSWER: C
Question 11
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
Answers:
A. F–F
B. Cl–F
C. C–H
D. N–O
E. H–F
ANSWER: E
Question 12
Six electrons shared between two atoms corresponds to a triple bond.
Answers:
True
False
ANSWER: True
Question 13
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.
Answers:
True/False
ANSWER: False
Question 14
Which statement about general bonding characteristics is FALSE?
Answers:
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.
ANSWER: C
Question 15
The ions formed from Group VI A atoms have charges of 2+.
Answers:
True /False
ANSWER: False
Question 16
All atoms of a particular element have identical physical properties.
Answers:
True /False
ANSWER: False
Question 17
A sample of aluminum contains 2.91 × 1022 atoms of aluminum. What is the mass of this sample?
Answers:
A. 0.767 g
B. 558 g
C. 7.85 × 1023g
D. None of these answers are correct
E. 1.08 × 1021 g
ANSWER: D
Question 18
Boyle's Law states that the volume of a gas varies directly with the absolute temperature.
Answers:
True /False
ANSWER: False
Question 19
Ionic solids are amorphous.
Answers:
True /False
ANSWER: False
Question 20
A solution that is 1 ppm contains more dissolved solute than one that is 1 ppt.
Answers:
True /False
ANSWER: False
Question 21
One mole of oxygen gas contains 6.022 × 1023 atoms.
Answers:
True /False
ANSWER: False
Question 22
There are seven valence electrons in a chloride anion.
Answers:
True /False
ANSWER: False
Question 23
How many milliliters of 12.0 M HCl are needed to prepare 250.0 mL of 2.50 M HCl solution?
Answers:
A. 12.0 mL
B. 25.0 mL
C. None of these answers are correct.
D. 52.1 mL
E. 2.50 mL
ANSWER: D
Question 24
Usually, as temperature increases, viscosity of a liquid decreases.
Selected Answer:
True
Answers:
True
False
Question 25
There are eight hydrogen atoms in a molecule of ammonium sulfate.
Answers:
True/False
ANSWER: True
Question 26
Which process depicts a physical change?
Answers:
A.
B. None of these processes depicts a physical change.
C.
D.
E.
ANSWER: C
Question 27
Which of the following numbers has only one significant figure?
Answers:
A. 0.003
B. All of these answers are correct.
C. 3.00
D. 30.0
E. 3.0 × 101
ANSWER:A
Question 28
If the density of carbon tetrachloride is 1.59 g/mL, what is the volume in L, of 2.37 kg of carbon
tetrachloride?
Answers:
A. None of these answers are correct.
B. 0.378 L
C. 2.65 L
D. 6.69 L
E. 1.49 L
ANSWER: E
Question 29
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?
Answers:
A. 5.0 L
B. 200 mL
C. 5 mL
D. None of these answers are correct.
E. 20 L
ANSWER: D
Question 30
How can pure water be made to boil at a temperature below 100°C?
Answers:
A. decrease the volume of water
B. one 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
ANSWER: D
Question 31
The halogens, Group VII A, tend to have the lowest ionization energies of any group in the periodic
table.
Answers:
True/False
ANSWER: False
Question 32
An aqueous solution containing a nonvolatile solute will boil above 100°C at 1 atm pressure.
Answers: True/False
ANSWER: True
Question 33
One gram of gold (atomic mass 197 amu) contains more atoms than one gram of copper (atomic
mass 63.55 amu).
Answers: True/False
ANSWER: False
Question 34
According to Boyle's Law, P2 = P1 x V1 / V2
Selected Answer: True /False
Answer: True
Question 35
At 100°C, which gas sample exerts the greatest pressure?
Answers:
A. A
B. B
C. C
D. D
E. They would all exert the same pressure.
ANSWER: A
Question 36
What property of light is defined by the distance between identical points on adjacent waves?
Answers:
A. energy
B. None of these answers are correct.
C. wavelength
D. amplitude
E. Speed
ANSWER: C
Question 37
The terms mass and weight are identical on the earth.
Answers:
ANSWER: False
True / False
Question 38
0.5 mol of oxygen gas can react with excess hydrogen gas to form 1.0 mol of water.
Answers:
True/False
ANSWER: True
Question 39
Complete combustion of a hydrocarbon compound in oxygen produces carbon dioxide and hydrogen.
Answers:
True/False
ANSWER: False
Question 40
What Kelvin temperature corresponds to 98.6°F?
Answers: A. None of these answers are correct.
B. 37.0 K
C. 13.1 K
D. 310. K
E. 31.0 K
ANSWER: D
Question 1
What term is used to describe a compound that contains water molecules incorporated in its
structure?
Selected Answer:
hydrate
B.
B.
hydrate
Answers:
A.
condensation
A.
condensation
B.
aqueous
B.
aqueous
C.
hydrate
C.
hydrate
D.
None of these answers are correct
D.
None of these answers are correct
E.
condensate
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:
Answers:
True
False
False
Question 3
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
Which statement about chemical bonds is FALSE?
Selected Answer:
C.
A nonpolar covalent bond is one in which electrons are not shared equally between the atoms.
Answers:
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
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
Which statement concerning atoms is FALSE?
Selected Answer:
C.
The mass number of an atom is the sum of the number of protons, neutrons, and electrons it contains.
Answers:
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
Colligative properties depend only on the concentration of solute particles, not on their identity.
Selected Answer:
Answers:
True
False
Question 8
True
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
Choose the best classification of the reaction represented by the following equation:
MgO(s) + CO2(g) → MgCO3(s)
Selected Answer:
combination
Answers:
A.
double-replacement
B.
C.
decomposition
C.
combination
D.
single-replacement
E.
None of these answers are correct
Question 10
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
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
Six electrons shared between two atoms corresponds to a triple bond.
Selected Answer:
True
Answers:
True
False
Question 13
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
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
The ions formed from Group VI A atoms have charges of 2+.
Selected Answer:
Answers:
False
True
False
Question 16
All atoms of a particular element have identical physical properties.
Selected Answer:
Answers:
False
True
False
Question 17
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
Boyle's Law states that the volume of a gas varies directly with the absolute temperature.
Selected Answer:
Answers:
False
True
False
Question 19
Ionic solids are amorphous.
Selected Answer:
Answers:
False
True
False
Question 20
A solution that is 1 ppm contains more dissolved solute than one that is 1 ppt.
Selected Answer:
Answers:
False
True
False
Question 21
One mole of oxygen gas contains 6.022 × 1023 atoms.
Selected Answer:
Answers:
False
True
False
Question 22
There are seven valence electrons in a chloride anion.
Selected Answer:
Answers:
False
True
False
Question 23
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
Usually, as temperature increases, viscosity of a liquid decreases.
Selected Answer:
True
Answers:
True
False
Question 25
There are eight hydrogen atoms in a molecule of ammonium sulfate.
Selected Answer:
True
Answers:
True
False
Question 26
Which process depicts a physical change?
Selected Answer:
D.
Answers:
A.
B.
None of these processes depicts a physical change.
C.
D.
E.
Question 27
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
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
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
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
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
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
An aqueous solution containing a nonvolatile solute will boil above 100°C at 1 atm pressure.
Selected Answer:
True
Answers:
True
False
Question 33
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
According to Boyle's Law, P2 = P1 x V1 / V2
Selected Answer:
True
Answers:
True
False
Question 35
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
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
0.5 mol of oxygen gas can react with excess hydrogen gas to form 1.0 mol of water.
Selected Answer:
True
True
Answers:
False
Question 39
Complete combustion of a hydrocarbon compound in oxygen produces carbon dioxide and
hydrogen.
Selected Answer:
Answers:
False
True
False
Question 40
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
ANE-560-01-0804 CHEM & PHYS II (ANE-560-01-0804) > TOOLS > MY GRADES > VIEW ATTEMPTS > REVIEW ASSESSMENT: CHEM & PHYSICS EXAM 1
Review Assessment: Chem & Physics Exam 1
Question 1
In the compound CH3Cl, the bond between carbon and chlorine is _____________.
Selected Answer:
Correct Answer:
Polar covalent
Polar covalent
Question 2
Aspirin is the common name for acetyl salicylic acid, C9H8O4. An extra strength aspirin
tablet contains 500. mg of aspirin. How many moles is this?
Selected Answer:
Correct Answer:
2.78 × 10−3 mol
2.78 × 10−3 mol
Question 3
Write the formula of sodium carbonate.
Selected Answer:
Correct Answer:
Na2CO3
Na2CO3
Question 4
Short wavelengths of light have more energy than long wavelengths.
Selected Answer:
Correct Answer:
True
True
Question 5 0 out of 2.5 points
One mole of Ca3(PO4)2 contains 6.02 × 1023 atoms of calcium.
Selected Answer:
Correct Answer:
True
False
Question 6
What property of liquids explains the formation of spherical water droplets on green leaves?
Selected Answer:
Correct Answer:
Surface tension
Surface tension
Question 7
0.5 mol of oxygen gas can react with hydrogen gas to form 1.0 mol of water.
Selected Answer:
Correct Answer:
True
True
Question 8
How many neutrons are present in an atom of the isotope 73Li ?
Selected Answer:
Correct Answer:
None of these answers are correct.
None of these answers are correct.
Question 9
The average energy of an ideal gas molecule depends on the molecular weight of the gas.
Selected Answer:
Correct Answer:
False
False
Question 10
Evaporation is the term that describes a liquid changing to a vapor at a temperature less than
its boiling point.
Selected Answer:
Correct Answer:
True
True
Question 11
Hydrogen bonding involves intermolecular forces.
Selected Answer:
Correct Answer:
Question 12
True
True
The symbol Δ, above or below the reaction arrow in an equation, indicates that heating is
needed for the reaction to take place.
Selected Answer:
Correct Answer:
True
True
Question 13 0 out of 2.5 points
The atoms of smallest radius are those of elements in the upper left hand part of the periodic
table.
Selected Answer:
Correct Answer:
True
False
Question 14
Substances in which of the following State of Matter would usually exhibit the lowest density?
Selected Answer:
Correct Answer:
Gas
Gas
Question 15
Which isotope of hydrogen has two neutrons?
Selected Answer:
Correct Answer:
Tritium
Tritium
Question 16
What Kelvin temperature corresponds to 80.60°F?
Selected Answer:
Correct Answer:
300.0 K
300.0 K
Question 17 0 out of 2.5 points
The old name of copper(II) chloride is cuprous chloride.
Selected Answer:
Correct Answer:
True
False
Question 18 0 out of 2.5 points
How many significant figures are in the number 1.06310 × 104?
Selected Answer:
Correct Answer:
5
6
Question 19
There are three atoms of iodine represented in the formula NaIO3.
Selected Answer:
Correct Answer:
False
False
Question 20
How many electrons are present in an atom of silicon?
Selected Answer:
Correct Answer:
14
14
Question 21
Charles' law describes the relationship between the volume and the pressure of a gas.
Selected Answer:
Correct Answer:
False
False
Question 22
A steel oxygen cylinder is brought into a 65oF operating room from a 90oF loading dock. Which
of the following statements is correct about this situation?
Selected Answer:
Correct Answer:
According to Guy-Lussac's law, the pressure in the cylinder will be lower in the OR.
According to Guy-Lussac's law, the pressure in the cylinder will be lower in the OR.
Question 23
The speed of light is 186,000 miles per second. What is its speed in centimeters per minute?
[Use: 5280 feet = 1 mile; 12 inches = 1 foot; 2.54 cm = 1 inch]
Selected Answer:
Correct Answer:
1.80 × 1012 cm/min
1.80 × 1012 cm/min
Question 24
Iron reacts with oxygen to form iron(III) oxide. How many grams of iron(III) oxide can be formed
from 5.00 grams of Fe?
Selected Answer:
Correct Answer:
7.15 g
7.15 g
Question 25 0 out of 2.5 points
A double bond between two atoms, A and B _______________.
Selected Answer:
Correct Answer:
Consists of two electrons shared between A and B
None of these answers are correct.
Question 26
How many atoms of hydrogen are present in 7.11 grams of hydrogen gas?
Selected Answer:
Correct Answer:
4.25 x 1024 atoms
2.12 x 1024 atoms
Question 27
Dinitrogen monoxide or laughing gas (N2O) is used as a dental anesthetic and as an aerosol
propellant. How many moles of N2O are present in 12.6 g of the compound?
Selected Answer:
Correct Answer:
0.286 moles
0.286 moles
Question 28 0 out of 2.5 points
A cubic foot of a substance weighs 50 lbs on earth. The density of the substance must
therefore by 0.8 g/ml.
Selected Answer:
Correct Answer:
False
False
Question 29 0 out of 2.5 points
Density is an intensive property of matter.
Selected Answer:
Correct Answer:
False
True
Question 30
What law predicts the expansion of a balloon when helium is added?
Selected Answer:
Correct Answer:
Avogadro's Law
Avogadro's Law
Question 31
Microwaves, light and X-rays are all forms of Electromagnetic Repulsion.
Selected Answer:
False
Correct Answer:
False
Question 32
Molecular compounds usually involve ionic bonding.
Selected Answer:
Correct Answer:
False
False
Question 33
One gram of gold (atomic mass 197 amu) contains more atoms than one gram of copper
(atomic mass 63.55 amu).
Selected Answer:
Correct Answer:
False
False
Question 34
Which of the following has the greatest electronegativity?
Selected Answer:
Correct Answer:
Br
Br
Question 35
Specific gravity is expressed in units of mass/volume.
Selected Answer:
Correct Answer:
False
False
Question 36
The terms mass and weight are identical.
Selected Answer:
Correct Answer:
False
False
Question 37
If an atom loses one electron, it becomes an cation.
Selected Answer:
Correct Answer:
True
True
Question 38
Dalton's Law states that the volume of a gas varies directly with the absolute temperature.
Selected Answer:
Correct Answer:
False
False
Question 39 0 out of 2.5 points
Which of the following elements is most likely to form a 2+ ion?
Selected Answer:
Correct Answer:
None of these answers are correct.
Fe
Question 40
How can pure water be made to boil at a temperature below 100°C?
Selected Answer:
Correct Answer:
Decrease pressure below 1 atm
Decrease pressure below 1 atm
CH 4 Practice Quiz 1
Question 1
Which is the molar mass of acetylsalicylic acid (aspirin), C9H8O4:
29 g
108 g
196 g
180 g
none of the above
Selected Answer:
180 g
Question 2
The reaction Fe3O4 + C ---> CO2 + Fe can be balanced with the coefficients:
1,2,2,3
1,4,4,3
2,4,4,3
1,1,1,3
Selected Answer:
1,1,1,3
Answers:
1,2,2,3
Question 3
How many hydrogen atoms are present in 42 g of ammonium carbonate?
Answers:
3.5
8
2.6 x 1023
1.1 x 1024
2.1 x 1024
Selected Answer:
2.1 x 1024
Question 4
How many phosphorus atoms are in 2.57 g of P?
Answers:
4.99 x 1022 atoms
4.80 x 1025 atoms
7.26 x 1024 atoms
0.0829 atoms
2.57 atoms
Selected Answer: 7.26 x 1024 atoms
Answers:
4.99 x 1022 atoms
Question 5
What is the mass of 5.45 x 10-3 mol of glucose C6H12O6?
Answers:
0.158 g
981 g
3.03 x 10-5 g
0.981 g
none of the above
Selected Answer:
0.981 g
Question 6
What is the percent yield of PI3, if 58.62 g of I2 are reacted with an excess of phosphorus
according to the following equation and 60.75 g are actually obtained? 2 P(s) + 3 I2(s) --->
2PI3(s)
Answers:
84.97 %
1.57 %
48.37 %
37.6 %
95.8 %
Selected Answer:
95.8 %
Question 7
In the reaction of Fe3O4 with carbon to form carbon dioxide and iron, the number of moles
of carbon required to convert 23 g of Fe3O4 to products is:
Answers:
0.05
0.1
0.2
0.3
0.4
Selected Answer:
0.2
Question 8
Given the reaction CH4 + 2O2 ----------> 2H2O + CO2 which statement is FALSE?
Answers:
16 g O2 reacts to form 18 g H2O
16 g CH4 combines with 64 g O2
1 mol CO2 is formed from 2 mol O2
1 mol CH4 reacts to form 2 mol H2O
18 g H2O is produced from 1 mol O2
Selected Answer:
Question 9
16 g O2 reacts to form 18 g H2O
The reaction C7H16 + O2 ---> CO2 + H2O can be balanced with the coefficients:
Answers:
1, 9, 6, 8
2, 10, 7, 8
1, 11, 7, 8
1, 10, 7, 8
Selected Answer:
1, 11, 7, 8
Question 10
A mole of H2
Answers:
contains 6 x 1023 atoms.
contains 6 x 1023 molecules.
contains 1 gram of hydrogen.
is 6 x 1023 grams of hydrogen.
none of the above
contains 6 x 1023 molecules.
Selected Answer:
Question 11
What is the coefficient of CO2 when the following equation is properly balanced with the
smallest set of whole numbers? C4H10 + O2 ---> CO2 + H2O
Answers:
1
4
6
12
8
Selected Answer:
Answer 8
Question 12
4
The correct coefficients for the unbalanced equation below are: CoBr3 + Na2CO3 --->
Co2(CO3)3 + NaBr
Answers:
Selected Answer:
1,3,1,6
2,3,1,6
2,1,1,2
1,1,1,3
2,3,1,6
Question 13
Caustic soda, NaOH, can be prepared commercially by the reaction of Na2CO3 with slaked
lime, Ca(OH)2. How many grams of NaOH can be obtained by treating 1.350 kg of Na2CO3 with
Ca(OH)2?
Answers:
Selected Answer:
1788.8 g
1019 g
1.79 g
509.4 g
1.02 g
1019 g
Question 14
The coefficients needed to balance the second step of the Ostwald process, __ NO. + __ O2
-----> __ NO2 , are
Answers:
Selected Answer:
1, 1, 1
2, 1, 2,
2, 5/2, 2
4, 5, 4
none of the above
1, 1, 1
Answer
2, 1, 2,
CH 05 Practice Self Quiz 1
Question 1 .
Which of the following is not characteristic of gases?
o
o
o
o
have much lower densities than solids or liquids
formation of homogenous mixtures regardless of the nature of gases
>retains shape easily
high compressibility
Question 2 .
What is the gas pressure in atmospheres of 485 cm Hg?
o
0.64 atm
o
o
o
o
33.0 atm
6.38 atm
5.50 atm
6.46 atm
Question 3 .
What is the density of carbon dioxide at STP?
o
o
o
1.96 kg/L
1.96 g/mL
1.96 mg/L
 1.96 mg/mL
Question 4
A sample of gas occupies 3.00 L at 760 torr. Calculate the volume it will occupy at 1.45
atm and the same temperature.
4.35 L
2280 L
1572.4 L
2.07 L
0.48 L
Question 5
A 14.0 g sample of N2 gas occupies what volume at STP?
5.6 L
11.2 L
22.4 L
14 L
Question 6
A balloon has a volume of 1.5 x 103 L of helium at 1.0 atm and 25 oC. At an altitude of
21 km the temperature is -50. oC and the atmospheric pressure is 76.0 mm Hg. What is
the volume of this balloon at 21 km?
8.9 x 10-5 L
1.9 x 102 L
1.5 x 103 L
7.5 x 103 L
1.1 x 104 L
Question 7 .
The volume of an ideal gas is directly proportional to the number of moles of the gas at constant
temperature and pressure is a statement of _____________ Law.
o
o
o
o
o
Charles's
Boyle's
Amonton's
Avogadro's
Dalton's
Question 8 .
A mixture of three gases has a pressure at 298 K of 1380 mm Hg. The mixture is analysed and found
to contain 302 mm Hg of CO2 and 722 mm Hg of CO. What is the partial pressure of Ar?
238 mm Hg
302 mm Hg
356 mm Hg
1753 mm Hg
8018 mm Hg
Question 9 .
Which of the following best describes the bonding between atoms in metals.
the transfer of electrons from one atom to another, producing charges which then interact with
each other
by sharing pairs of electrons with adjacent atoms
by fusing the atomic nuclei to produce a continuous malleable array
the valence electrons of a given metal atom are delocalized over all of the atoms in the piece
of metal
the fusion of the protons, neutrons and electrons to form a hard solid mass
Question 10 .
Butter, like glass, melts over a range of temperatures, rather than with a sharp melting point. Butter
might be classified as a/an:
covalent solid
ionic crystal
metallic crystal
amorphous solid
molecular crystal
Question 11 .
The boiling point of a substance is most strongly influenced by:
the molecular weight of a substance
the specific heat of the substance
the melting point
the strength/weakness of the intermolecular forces
the amount of the substance involved
Question 12 .
Viscosity of liquids typically increases when which of the following is considered, except:
the temperature is increased
compounds with ionic bonds are involved
substances that can hydrogen bond are used
longer molecules are used
compounds with greater molecular weights are used
Question 13 .
All of the following are intermolecular forces except:
o
o
o
o
dipole-dipole interactions
London forces
covalent forces
van der Waals forces
Question 14 .
Which one of the following is not an example of a covalent network solid?
o
o
o
o
o
diamond
SiO2
Ge
graphite
none of the above
Question 15 .
Which of the following exhibits the most hydrogen bonding?
o
o
o
o
LiH
CH4
NH3
H2S