Electron Configurations
Which electron has the highest electronegativity?
A) cesium
B) iodine
C) oxygen
D) lithium
C) oxygen
When a cold block of aluminum at 0 degrees Celsius is placed in water at 21 degrees Celsius in an insulated cup, the water and aluminum end up at a final temperature of 19 degrees Celsius. Which statement best describes the energy exchange here?
A) The block of aluminum lost the energy the water gained.
B) The block of aluminum gained the energy the water lost.
C) The block of aluminum gained less energy compared to the energy lost by the water.
D) The block of aluminum gained more energy compared to the energy lost by the water.
B) The block of aluminum gained the energy the water lost.
Which electronic transition in a hydrogen atom is associated with the largest emission of energy?
A) n = 2 to n = 1
B) n = 2 and n = 3
C) n = 2 and n = 4
D) n = 3 and n = 2
A) n = 2 to n = 1
How many moles of hydrogen atoms are in six moles of Ca(OH)2?
A) 2
B) 6
C) 8
D) 12
D) 12
What single from Taylor Swift's new album is currently #1 on the Billboard 100?
The Fate of Ophelia
What is the valence electron configuration for the element in Period 5, Group 3A?
5s25p1
Two metal samples of the same mass and initially at 25.0 g are heated so that each metal will receive the same amount of thermal energy. Which metal will have the highest final temperature, if metal X has a specific heat of 0.350 and metal Z has a specific heat of 0.895?
Metal X
What is the energy of a photon with a wavelength of 656 nanometers?
3.03 x 10-19 J
Determine the number of moles of carbon dioxide (CO2) formed when 2.50 mol ethanol (C2H6O) undergoes combustion in excess oxygen.
C2H6O + 3O2 -> 2CO2 + 3H2O
5.00 mol
What album won the 2025 Grammy for Album of the Year?
Cowboy Carter
What is the electron configuration of the valence electrons for a ground-state Ge atom?
A) 4p2
B) 4s23d104p2
C) 3d104p2
D) 4s24p2
D) 4s24p2
Equation 1: SO2 -> S + O2, ΔH1
Equation 2: 2SO2 + O2 -> 2SO3, ΔH2
Write the equation for the enthalpy of:
S + 3/2O2 -> SO3(g)
using ΔH1 and ΔH2.
ΔH* = -ΔH1 + 1/2ΔH2
The wavelength of green light from a traffic signal is centered at 5.20 x 10-5 cm. Calculate the frequency.
5.77 x 1014 Hz
What is the theoretical yield of NO that can be produced from the reaction of 3.50 mol NH3 and 4.01 mol O2?
4NH3 + 5O2 -> 4NO + 6H2O
A) 3.21 mol
What's my last name?
Karaman
What is angular momentum quantum number and its associated symbol? An angular quantum number of 1 correlates to what?
It is the shape of the electron density distribution (ℓ). It ranges from 0 to n-1. ℓ=1 correlates to a p-orbital.
C(s) + 2Cl2 -> CCl4 (l), ΔH*rxn = -135.4 kJ/mol
What mass of Cl2 is needed to release 45.2 kJ of energy as heat during the reaction of carbon and chlorine gas?
A) 0.67 g
B) 11.8 g
C) 23.7 g
D) 47.3 g
D) 47.3 g
When excited, a sodium atom emits a photon of frequency 5.090 x 1014 Hz. What is the energy associated with this emission?
3.37 x 10-19 J
What are the smallest whole number coefficients for each substance in the chemical equation when balanced?
__ AgI + __Na2S -> __Ag2S + __NaI
2, 1, 1, 2
Who headlined the 2024 Superbowl Halftime show?
Usher
Which set of quantum numbers is correct and consistent with n = 4?
A) l = 3, ml = -3, ms = 1/2
B) l = 4, ml = 2, ms = -1/2
C) l = 2, ml = 3, ms = 1/2
D) l = 3, ml = -3, ms = 1
A) l = 3, ml = -3, ms = 1/2
A 10.0 g sample of silver is heated to 100.0 C and then added to 20.0 g of water at 23.0 C in an insulated calorimeter. At thermal equillibrium, the temperature is measured to be 25.0 C. What is the specific heat of silver?
(specific heat of H2O = 4.184)
0.22 J/g*C
Calculate the energy of a group of 5 photons emitted by a laser with a frequency of 4.75×10^14 s^-1
h=6.626x10^-34 J/s
1.57x 10^-18J
Ibuprofen, a common pain reliever, contains 75.7% carbon, 15.5% oxygen, and 8.80% hydrogen by mass. What is the empirical formula?
A) C6H9O
B) C9HO2
C) C13H18O2
D) C76H9O16
C) C13H18O2
What is my major?
Public Health!