EM Radiation
Orbitals/Configs.
Mass Relationships
Gas Laws
Other Chem Stuff
Random Trivia :)
100
When wavelength increases, energy_________ (increases / decreases).
Energy decreases
100
What values are accepted for the spin quantum number, ms?
+1/2 and -1/2
100
How many moles in 100g of potassium (K)?
2.56 moles
100
What is 42 degrees C in Kelvin?
315 K
100
Which of the following is INCORRECT about isotopes?
a. Isotopes have the same atomic number but different mass number
b. Isotopes have a different number of neutrons but the same number of protons
c. Isotopes have the same number of neutrons but a different number of electrons.
c. Isotopes have the same number of neutrons but a different number of electrons.
Isotopes have a DIFFERENT number of neutrons.
100
This place in the Valley Library is named after Avogadro's number, which is coincidentally the name of an animal that likes to dig.
What's the Mole Hole?
200
Convert 3.5 x 10-4 meters to nanometers
3.5 x 105 nm
200
How many electrons can fit in all d orbitals?
10 electrons
There are 5 d orbitals that can hold 2 electrons each
200
When studying late at night for your midterm, you might drink a caffeinated beverage to stay awake. The chemical formula of caffeine is C8H10N4O2. Calculate the molar mass of caffeine.
194.2 g/mol
200
Which is NOT a principle of Kinetic Molecular Theory?
a. collisions are elastic (no loss of energy)
b. gas particles are in constant motion, and travel in a straight line
c. kinetic energy depends on the pressure of a gas
d. pressure comes from the collisions of molecules on the walls of its container
c. kinetic energy depends on the pressure of a gas
Kinetic energy depends on the TEMPERATURE of the gas.
200
Which element has the highest ionization energy?
a. S
b. Mg
c. As
d. K
a. S
Ionization energy increases as you move up and to the right on the periodic table. It follows the opposite trend for atomic radius, which increases as you move down and to the left on the periodic table.
200
This is the number of cervical vertebrae that a giraffe has.
What is 7 vertebrae? (Yes, the same number as in humans, but they're just really big)
300
Which energy level change has the longest wavelength?
a. n = 2 to n = 4
b. n = 6 to n = 1
c. n = 5 to n = 8
d. n = 2 to n = 3
d. n = 2 to n = 3
Longer wavelength means lower energy. There is a lower energy difference when transitioning from energy levels that are closer together (eg. from n = 2 to n = 3)
300
Which of the following sets of quantum numbers describes a 3p orbital?
a. n = 3, l = 1, ml = 0, ms = +1/2
b. n = 3, l = 1, ml = -2, ms = +1/2
c. n = 2, l = 1, ml = 0, ms = -1/2
d. n = 3, l = 2, ml = 0, ms = +1/2
a. n = 3, l = 1, ml = -1, ms = +1/2
n = 3 corresponds to the "3" in 3p.
l = 1 refers to p orbitals (0 = s, 2 = d, 3 = f)
ml can be -l ...0...+l (for a p orbital, it can be -1, 0, +1)
ms is always either +/- 1/2
300
Calculate the number of individual water molecules in 5g water (H2O).
1.67 water molecules
300
If a sample of gas is compressed (reducing the volume of its container), the pressure _______(increases / decreases)
Pressure increases
300
What is the core charge and number of valence electrons of Calcium (Ca)?
core charge = +2, 2 valence electrons.
300
This is the full name for SCUBA.
What is a self-contained underwater breathing apparatus?
400
What's the wavelength (in nanometers) of a photon with an energy of 6.2 x 10-19 J?
321 nm
400
Identify the element from the following electron config.:[Kr]5s²4d¹
Yttrium (Y)
400
Calculate the mass in grams of 9.12 x 1054 molecules of CO2
6.67 x 1032 g
400
Use Ideal Gas law to calculate the volume of gas in a vessel with 20.0 mol of Cl2 at a pressure of 32 atm and 27 degrees C.
15.4 L
400
Order these atoms in decreasing atomic radius (largest first): P, N Ga, and K
K, Ga, P, N
atomic radius decreases as you go up and to the right on the periodic table.
400
This children's book that is famous for the quote, "On ne voit bien qu'avec le coeur. L'essentiel est invisible pour les yeux" ("It is only with the heart that one can see rightly; what is essential is invisible to the eye") is the second-most translated book in the world after the Bible.
Quel est Le Petit Prince ? (What is The Little Prince?)
500
What is the energy (E) and frequency (v) of a photon of green light with a wavelength of 500nm?
E = 3.98 x 10-19 J
v = 6 x 1014 Hz
500
What is the noble gas config. of Xe?
[Kr]5s24d105p6
500
How many moles are in 12g of NaCl (sodium chloride aka table salt)?
0.21 moles
500
At 273 K and 1 atm, 987 g of gas has a volume of 168.4 L: Find the molar mass of the gas.
131.37 g/mol
500
Cl has 2 isotopes: Cl-35 and Cl-37. The average amu of Cl is 35.45. Cl-35 is 34.97 amu while Cl-37 is 36.97 amu. What is the % abundance of each isotope?
Cl-35 = 76%, Cl-37 = 24%
500
This is the mountain that Louisa climbed over the summer (Hint: Week 2 SI Table introductions)
What is Mt. Kinabalu? (It's the highest mountain in Malaysia at 13,435 ft)
