L.O.s 11-12
Dimensional Analysis
Dimensional Analysis
You're planning on driving across country with 5 friends for spring break to a city 636 miles away (one way). Your van averages 14.3 miles per gallon. The average cost of gasoline is $2.59 per gallon (this question was made a while ago...). How much will each person need to pay toward gas for the trip (both there and back), assuming the cost is evenly divided between you and your 5 friends? Give your answer to the nearest penny.
What is $38.40
Light strikes a metal and electrons are ejected. Which of the following is/are true? Select all that apply.
A. The photoelectric effect demonstrates the particle nature of light
B. If the wavelength of light increases, the kinetic energy of the ejected electrons will decrease
C. If the wavelength of light decreases, at some point electrons will stop being ejected
D. To eject more electrons per second, the brightness of light should be decreased
What is
(T) A. The photoelectric effect demonstrates the particle nature of light
(T) B. If the wavelength of light increases, the kinetic energy of the ejected electrons will decrease
(F) C. If the wavelength of light decreases, at some point electrons will stop being ejected
(F) D. To eject more electrons per second, the brightness of light should be decreased
List the 4 quantum numbers. For each, give their name, letter symbol, possible values, and what they determine in an orbital.
What is
1. Principle quantum number (n), energy and size, can be any integer greater than or equal to 1 (1, 2, 3, etc)
2. Angular momentum quantum number (l), shape, can be any integer from 0 to n-1
3. Magnetic quantum number (ml), orientation, can be any integer from -l to +l (including 0)
4. Spin quantum number (ms), spin of the electron, can be +1/2 or -1/2
What is the ground-state electron configuration (including the correct order of filling according to the periodic table) for Bi? (not the shorthand version!)
What is
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3
You own an engineering firm that uses a custom unit called "Zobos." If 8.12 Zobos = 3.22x1014 pm, calculate the distance in Gm of 8.24x1012 Zobos. Give your answer to 3 significant figures.
What is 3.27x105 Gm
You own a landscaping and lawn-care business. You charge clients in residential areas 21 cents/yd2 to mow a lawn one time. How much should you charge a client to mow a lawn that is 74 feet by 97 feet 16 times? Give your answer to the nearest dollar. 3 feet=1yd
What is $2,680
Which of the following is/are true? Select all that apply.
A. You cannot know the exact trajectory of an electron
B. An electron can act like a particle but not a wave
C. In the Bohr model of the atom, to emit a photon, an electron jumps from a higher to a lower energy level
D. According to the Bohr model of the atom, an electron cannot be observed between energy states
What is
(T) A. You cannot know the exact trajectory of an electron
(F) B. An electron can act like a particle but not a wave
(T) C. In the Bohr model of the atom, to emit a photon, an electron jumps from a higher to a lower energy level
(T) D. According to the Bohr model of the atom, an electron cannot be observed between energy states
Which of the following is/are true? Select all that apply.
A. A value of n designates the subshell
B. The principal quantum number corresponds to the size and energy of an orbital
C. Orbitals in the quantum mechanical model are derived from modeling the electron as a standing wave around the nucleus
D. n = 4, l = 4, ml = –2, ms = +1/2 is a valid set of quantum numbers
What is
(F) A. A value of n designates the subshell
(T) B. The principal quantum number corresponds to the size and energy of an orbital
(T) C. Orbitals in the quantum mechanical model are derived from modeling the electron as a standing wave around the nucleus
(F) D. n = 4, l = 4, ml = –2, ms = +1/2 is a valid set of quantum numbers
What is the ground-state electron configuration (including the correct order of filling according to the periodic table) for Se? (not the shorthand!)
What is
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4
Calculate the deBroglie wavelength in pm of a xenon gas atom (Chemical symbol: Xe) moving 857 m/s. Give your answer to 3 significant digits.
h = 6.626x10-34 J*s
6.022x1023
What is 3.54 pm
An engineering firm uses a custom unit of distance for a client called "pules" when working with a metal alloy. 1 pule=4.43 cm, and the metal alloy has a density of 4.28g/cm3. What volume in pules3 (cubic pules) of this alloy will 38.7 kg occupy? Give your answer to 3 significant figures.
What is 104 pules3
Which of the following is/are true? Select all that apply.
A. The diffraction of light demonstrates the particle nature of light
B. Red light has a longer wavelength than ultraviolet radiation
C. If two identical waves are out of phase when they interact, the result is constructive interference
D. As the energy of a photon decreases, the frequency decreases and wavelength increases
What is
(F) A. The diffraction of light demonstrates the particle nature of light
(T) B. Red light has a longer wavelength than ultraviolet radiation
(F) C. If two identical waves are out of phase when they interact, the result is constructive interference
(T) D. As the energy of a photon decreases, the frequency decreases and wavelength increases
Which of the following is/are true? Select all that apply.
A. According to Hund's rule, degenerate orbitals fill one orbital completely first with two electrons before adding an electron to a second orbital
B. Degenerate orbitals have the same value for their angular momentum quantum number
C. According to the Pauli exclusion principle, no two electrons in an atom can have the same four quantum numbers
D. According to the Aufbau principle, we can build up to the electron configuration for a multi-electron atom by adding electrons into the lowest energy available orbitals
What is
(F) A. According to Hund's rule, degenerate orbitals fill one orbital completely first with two electrons before adding an electron to a second orbital
(F) B. Degenerate orbitals have the same value for their angular momentum quantum number
(T) C. According to the Pauli exclusion principle, no two electrons in an atom can have the same four quantum numbers
(T) D. According to the Aufbau principle, we can build up to the electron configuration for a multi-electron atom by adding electrons into the lowest energy available orbitals
What is the shorthand ground-state electron configuration (including the correct order of filling according to the periodic table) for Sb?
What is
[Kr]5s2 4d10 5p3
Which of the following is/are true? Select all that apply.
A. According to Hund's rule, degenerate orbitals fill each orbital first with two electrons before adding any electrons to the next orbital
B. Degenerate orbitals have the same value for their spin quantum number
C. According to the Pauli exclusion principle, two electrons in an atom can have the same four quantum numbers
D. According to the Aufbau principle, we can build up to the electron configuration for a multi-electron atom by adding electrons into the highest energy available orbitals
What is none of the above
You're in charge of concessions at a baseball game, selling hotdogs. In 20 minutes, you can sell an average of 30 hotdogs. You want to make an average of $45/hr of profit. If each hotdog costs $1.50 for supplies, how much do you need to charge per hotdog (in $/hotdog)? Give your answer to the nearest hundredth (two to the right of the decimal place).
What is $2.00
Calculate the deBroglie wavelength in pm of a xenon gas atom (Chemical symbol: Xe) moving 342 m/s. Give your answer to 3 significant digits.
h = 6.626x10-34 J*s
6.022x1023
What is 8.89pm
Which of the following sets of quantum numbers are valid?
A. n=2, l=-1, ml=1, ms=+1/2
B. n=1, l=0, ml=1, ms=+1/2
C. n=3, l=2, ml=-2, ms=-1/2
What is
(F) A. n=2, l=-1, ml=1, ms=+1/2
(F) B. n=1, l=0, ml=1, ms=+1/2
(T) C. n=3, l=2, ml=-2, ms=-1/2
What is the shorthand ground-state electron configuration (including the correct order of filling according to the periodic table) for Bi?
What is
[Xe] 6s2 4f14 5d10 6p3
How many questions were on your exam, and what is the highest percentage you could have scored?
idk y'all tell me...
You own an engineering firm that uses a custom unit called "Zobos." If 5.12 Zobos = 1.22x1014 pm, calculate the distance in Gm of 4.24x107 Zobos. Give your answer to 3 significant figures.
What is 1.01 Gm
Calculate the de Broglie wavelength in pm of one Ar gas atom moving 500 m/s. Give your answer to 3 significant figures.
h = 6.626x10-34 J*s
6.022x1023
What is 20.0pm
Which of the following is/are true? Select all that apply.
A. Ca has 2 valence electrons and 18 core electrons
B. Fe has 6 valence electrons and 20 core electrons
C. Ge has 2 valence electrons and 30 core electrons
D. A valence electron in Br could have the quantum numbers n=4, l=0, ml=0, ms=1/2
E. A valence electron in Ti could have the quantum numbers n=3, l=1, ml=-1, ms=-1/2
What is
(T) A. Ca has 2 valence electrons and 18 core electrons
(F) B. Fe has 6 valence electrons and 20 core electrons
(F) C. Ge has 2 valence electrons and 30 core electrons
(T) D. A valence electron in Br could have the quantum numbers n=4, l=0, ml=0, ms=1/2
(F) E. A valence electron in Ti could have the quantum numbers n=3, l=1, ml=-1, ms=-1/2
What is the full-length and shorthand ground-state electron configuration (including the correct order of filling according to the periodic table) for Re?
What is
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d4
[Xe] 6s2 4f14 5d5
***may seem like 5d4 depending on periodic table used, but 5d5 is correct***
What is 9+10?