UNE Chem 1010 Final Exam Questions and
Correct Answers
Question 1
A chemical compound that dissociates completely to yield hydroxide ions when
dissolved in water is a
-strong base
-weak base
-strong acid
-weak acid
Correct Answer
strong base
Question 2
A hydroponic fertilizer solution contains 24.9 ppm of magnesium in water which is
equivalent to 24.9 mg/L. What is the total mass of magnesium in 65 L of the fertilizer
solution?
-2.61 kg
-1.62 g
-1.62 kg
-0.383 g
Correct Answer
1.62 g
Page 1 of 140
,Question 3
_____ is defined as mass per unit of measure.
Responses
Volume
A kilogram
Molarity
Density
Concentration
Correct Answer
Density
Question 4
Potassium is most likely to
-gain 1 electron to form an ion with a -1 charge
-lose 2 electrons to form an ion with a +2 charge
-lose 1 electron to form an ion with a +1 charge
-gain 2 electrons to form an ion with a -2 charge
Correct Answer
lose 1 electron to form an ion with a +1 charge
Question 5
The duet rule is based upon the observation that atoms are most stable when
surrounded by eight valence electrons.
True
False
Correct Answer
false
Page 2 of 140
,Question 6
Electron-deficient molecules can violate the octet rule because
-additional valence electrons can fill unoccupied d orbitals in the same shell
-they have an odd number of total electrons, so it is impossible for all electrons to be
paired to form an octet
-the central atom doesn't contain enough electrons to fill a valence shell
-the central atom has a very high electronegativity that allows it to attract an
additional electron
Correct Answer
the central atom doesn't contain enough electrons to fill a valence shell
Question 7
A tropical storm can be reclassified as a hurricane when the atmospheric pressure
drops below 0.979 bar. What is this pressure in atm?
-0.908 atm
-0.992 atm
-0.966 atm
-0.979 atm
Correct Answer
0.966 atm
Question 8
A π bond
-can form between s and p orbitals
-results from the side-by-side overlap of orbitals
-is stronger than an individual σ bond between the same two atoms
-is the first bond to form between two atoms, resulting in a single bond
Correct Answer
results from the side-by-side overlap of orbitals
Page 3 of 140
, Question 9
When calibrating a spectroscope, the violet spectral line should lie over the _____
mark.
Responses
400 nm
450 nm
550 nm
700 nm
Correct Answer
450 nm
Question 10
The diameter and radius of the syringe were measured to determine the _____ of
the Boyle's law apparatus.
Responses
surface area
volume
mass
All of the above
Correct Answer
surface area
Page 4 of 140
Correct Answers
Question 1
A chemical compound that dissociates completely to yield hydroxide ions when
dissolved in water is a
-strong base
-weak base
-strong acid
-weak acid
Correct Answer
strong base
Question 2
A hydroponic fertilizer solution contains 24.9 ppm of magnesium in water which is
equivalent to 24.9 mg/L. What is the total mass of magnesium in 65 L of the fertilizer
solution?
-2.61 kg
-1.62 g
-1.62 kg
-0.383 g
Correct Answer
1.62 g
Page 1 of 140
,Question 3
_____ is defined as mass per unit of measure.
Responses
Volume
A kilogram
Molarity
Density
Concentration
Correct Answer
Density
Question 4
Potassium is most likely to
-gain 1 electron to form an ion with a -1 charge
-lose 2 electrons to form an ion with a +2 charge
-lose 1 electron to form an ion with a +1 charge
-gain 2 electrons to form an ion with a -2 charge
Correct Answer
lose 1 electron to form an ion with a +1 charge
Question 5
The duet rule is based upon the observation that atoms are most stable when
surrounded by eight valence electrons.
True
False
Correct Answer
false
Page 2 of 140
,Question 6
Electron-deficient molecules can violate the octet rule because
-additional valence electrons can fill unoccupied d orbitals in the same shell
-they have an odd number of total electrons, so it is impossible for all electrons to be
paired to form an octet
-the central atom doesn't contain enough electrons to fill a valence shell
-the central atom has a very high electronegativity that allows it to attract an
additional electron
Correct Answer
the central atom doesn't contain enough electrons to fill a valence shell
Question 7
A tropical storm can be reclassified as a hurricane when the atmospheric pressure
drops below 0.979 bar. What is this pressure in atm?
-0.908 atm
-0.992 atm
-0.966 atm
-0.979 atm
Correct Answer
0.966 atm
Question 8
A π bond
-can form between s and p orbitals
-results from the side-by-side overlap of orbitals
-is stronger than an individual σ bond between the same two atoms
-is the first bond to form between two atoms, resulting in a single bond
Correct Answer
results from the side-by-side overlap of orbitals
Page 3 of 140
, Question 9
When calibrating a spectroscope, the violet spectral line should lie over the _____
mark.
Responses
400 nm
450 nm
550 nm
700 nm
Correct Answer
450 nm
Question 10
The diameter and radius of the syringe were measured to determine the _____ of
the Boyle's law apparatus.
Responses
surface area
volume
mass
All of the above
Correct Answer
surface area
Page 4 of 140
