Quantum Chemistry
Which of the following has the greatest Zeff?
F
Si
Fr
Bi
F
What is the pH and pOH of a solution containing 4.5 mM HNO3?
pH = 2.35
pOH = 11.65
What is the equilibrium constant expression for the following reaction:
3H2S(aq) + 2H+(aq) + 2NO3-(aq) <-> 3S(s) + 2NO(g) + 4H2O(l)
K = (NO)2/((H2S)3(H+)2(NO3-)2)
The sun, our sun, weighs 1.989 * 1030 kg (That's a lot!). If the sun were made entirely of H2, how many molecules would be contained therein? (Molar mass of H = 1.008; avogadro's number = 6.022 x 1023)
5.941 x 1056 (Wow)
Pick an answer:
A
B
C
D
E
C
What is the electron configuration of Mg?
1s22s22p63s2
What is the conjugate base AND conjugate acid of the following substance:
HPO42-
Conjugate acid:H2PO4-
Conjugate base: PO43-
Consider the following reaction and concentration of substances:
3O2(g) <-> 2O3(g) K = 0.00756
[O2] = 6.15 atm [O3] = 0.750 atm
What is Q? Does this reaction shift to the right or left to reach equilibrium?
Q<K, so the reaction shifts right
It takes light light from proxima centauri 37,100 hours to travel to Earth. How many light years away is that star?
4.24 light years!
How tall is Mr. Stankiewicz?
5' 11''
Sketch an electron in the Bohr Model going from n = 2 to n=4, including any photon absorbed/emitted.
(Photon is absorbed)
(Need four circles around the nucleus)
0.050 mL of pH = 11.75
0.0050 mL of pH = 1.25
pH = 7.00
__H2(g) + __O2(g) <-> __H2O(g) Kp = 1.00 x 103
[H2] = 0.400 atm [O2] = 0.837 atm [H2O] = ____
11.6 atm
You are a cheese eating machine! Since this is your only calcium intake, you need to make sure you eat enough to stay healthy. In every 1.00-ounce slice of cheese, there is 170. mg of calcium. You need 1.20 g of calcium per day. How many ounces of cheese need you eat to satisfy your calcium intake?
7.06 ounces
What was the topic of unit 5?
Kinetic-Molecular Theory (or Gases)
The energy of a photon is 5.23 x 10-19 J. What is this photon's wavelength in nm?
380. nm (NOT 380)
Ka of nitrous acid = 4.5 x 10-4. What is the pH of a 77 cM solution of nitrous acid?
pH = 1.73
Which of the following causes a right shift in the following reaction:
CaCO3(s) <-> CaO(s) + CO2(g) q = -1207 kJ/mol
Increasing temperature
Adding CaCO3
Adding CO2
NONE
A track athlete runs the 40.0-yard dash in 4.75 seconds. How fast was this person in miles per hour? (I hope you know how many yards are in a mile!)
17.2 miles per hour
What is Mr. Stankiewicz's favorite book?
Lord of the Rings
How many total electrons can have the following quantum numbers:
n = 2
m2 = -1/2
Four!
You are doing a titration! YOu find that it takes 45.0 mL of a pH = 11.00 solution to neutralize 2.00 mL of a solution with unknown pH. What is the pH of this unknown solution?
pH = 1.65
What is the equilibrium concentration of PH3 and BCl3 if 5.00 M PH3BCl3 is placed in a vacuum chamber and allowed to come to equilibrium?
PH3BCl3(g) <-> PH3(g) + BCl3(g) Kc = 0.150
0.794 M
You buy a mold to smelt iron, but its dimensions were given in metric, and you want to convert it to US customary. How many ft3 is your 250,000.0 cm3 mold?
(2.54 cm = 1 inch exactly)
8.828667 ft3
What year was Mr. Stankiewicz born?
SKIP