Trivia
What year was Shrek 2 released?
2004
What is the strongest IMF? (Intermolecular force)
Hydrogen Bond
How many moles of KBr are there in 80.0 mL of a solution of 1.8 M KBr?
0.144 mol
The initial concentration of a reactant is [A]0=2.0 M.
The rate constants for the reaction are:
Zero‑order: k=0.40 M/s
First‑order: k=0.25 s−1
Second‑order: k=0.10
What is the concentration [A]t after 4.0 seconds for each reaction order?
1.11 M
What does half-life mean?
The time it takes for the concentration of a substance to be halved.
Name all the ANCIENT 7 wonders of the world
The Great Pyramid of Giza
The Hanging Gardens of Babylon
The Statue of Zeus at Olympia
The Temple of Artemis at Ephesus
The Mausoleum at Halicarnassus
The Colossus of Rhodes
The Lighthouse of Alexandria.
Sublimation is defined as....
The process where a substance transitions from a solid to a gas
A chemist dissolves 25g of KCl in enough water to make 500mL of solution. What is the molarity of the solution?
0.671 M
The rate constant at T2=350 , k2=0.85 s−1
The activation energy is Ea=75.0 kJ/mol.
What is the rate constant k1 at T1=300K?
k₁ = 0.0116 s⁻¹
What is the expression for the equilibrium constant Kc for the following reaction?
2X(g)+3Y(g) ⟷ 4Z(g)+W(g)
Kc=[Z]^4 [W] / [X]^2 [Y]^3
What is the Texas state animal?
Armadillo
During the solvation (hydration) process of KCl with water, the __________ interact(s) with the Cl⁻ ions of the salt.
A. negatively charged oxygen
B. positively charged oxygen
C. negatively charged hydrogens
D. positively charged hydrogens
positively charged hydrogens
What volume of a 5M HCl solution is needed to prepare 250mL of a 0.5M solution?
25mL of 5M HCl is needed
For a reaction with [A]0=1.0 M, the rate constants are:
Zero‑order: k=0.20 M/s
First‑order: k=0.40 s−1
Second‑order: k=0.50
4A(aq) -> products (aq)
What is the half‑life t1/2 for each reaction order?
0th order: 0.625 s
1st order: 0.433 s
2nd order: 0.500 s
The equilibrium of the following reaction would be shifted to the _______ if the temperature was decreased.
N2O4(g) ⇌ 2NO2(g) + ΔH
Products
Who did Will Smith slap at the Oscars in 2022?
Chris Rock
Name the potential IMF's that ammonia can have.
hydrogen bonding, dipole-dipole interactions, and London dispersion forces
What is the solubility S of O₂ in water at a pressure of 2.5 atm?
KH,O2=1.3×10−3
3.25×10−3 mol/L
The decomposition of substance B is monitored over time.
Use the data below to calculate the average rate of decomposition of B over the following intervals:
a) 0.0 – 8.0 s
b) 8.0 – 16.0 s
c) 0.0 – 16.0 s
B(aq)⟶ProductsB(aq)
**I will provide that table
a) 1.125 M/s
b) 1.125 M/s
c) 1.125 M/s
Which of the following expressions represents an endothermic reaction? (Select all that apply)
A.
N2(g)+3H2(g) ⟶ 2NH3(g)+Δ
B.
CaCO3(s)+Δ ⟶ CaO(s)+CO2(g)
C.
CH4(g)+2O2(g) ⟶ CO2(g)+2H2O(g) +Δ
D.
H2O(s)+Δ ⟶ H2O(l)
E.
HCl(g)+NH3(g) ⟶ NH4Cl(s)+Δ
B. CaCO3(s)+Δ→CaO(s)+CO2(g)
D. H2O(s)+Δ→H2O(l)
How many moons does Jupiter have?
95
A liquid has a vapor pressure of 0.80 atm at a temperature of 300 K.
What is the vapor pressure at a temperature of 320 K?
The enthalpy of vaporization is 35.0 kJ/mol.
Use R=8.314
1.918 atm
What is the vapor pressure of a solution made by dissolving 50g of sucrose (C12H22O11) in 300g of water at 25 degrees Celsius, given that the vapor pressure of pure water at this temperature is 23.76mmHg?
23.54mmHg
At what temperature will the rate constant be k=0.250 s−1 if the collision frequency factor is A=5.0×10^8 s−1 and the activation energy is Ea=60.0 kJ/mol?
(R=8.314)
T = 337 K
The Kc of the following reaction is 2.3×10−3. What is the corresponding Kp at 25 °C?
(Assume R=0.08206)
2X(g)+Y(g)⟷3Z(g)
2.3×10−3