VSEPR
The molecular geometry of CO2
What is linear?
A CHEM 6A student observes a violet light emitting a wavelength of 420 nm. What is its frequency?
What is 7.14 X 1014 Hz?
The number of sigma and pi bonds in CO2
What is 2 sigma, 2 pi?
The number of moles in 69.723 grams of Ga
What is 1?
This scientist identified positive charges at the center of the atom
Who is Ernest Rutherford?
The molecular geometry of NH3
What is trigonal pyramidal?
The number of orbitals in a n = 3, l = 1 subshell
What is 3?
An example with sp hybridization
What is:
(any compound that has two atomic orbitals; ex. the carbon in C2H2)
The mass percent of C in acetone (C3H6O)
What is 62.0%?
The number of neutrons in 190Os
What is 114?
An example of a tetrahedral electron geometry
What is:
(anything that has 4 domains; ex. CH4, Cl2)
A light of wavelength 420 nm strikes a clean surface of metallic Cs in vacuum and ejects an electron having a kinetic energy of 6.90 x 10-19 J. What is the de Broglie wavelength of this electron?
What is 0.59 nm?
The 5 elements where sigma(2p) > pi(2p) (in terms of energy)
What are Li, Be, B, C, N?
Consider the following: 2 Mg + O2 => 2 M
What is the limiting reactant if 2.2 g of Mg is reacted with 4.5 L of oxygen at STP?
What is Mg?
Find the imposter:
density, acidity, odor, color, boiling point
What is acidity?
(all the others are physical properties)
The hybridization for BrF2-
What is sp3d?
A CHEM 6A observes a 486.1 nm line in the Balmer series, what was the initial level?
Hint: nf is the ground state in the Balmer series; assume the element is Hydrogen
What is 4?
Draw the valence bond diagram for HCN
What is:
(check the google drive folder)
A compound is found to contain 26.56% potassium, 35.41% chromium, and the remainder oxygen. Find its empirical formula.
What is K2Cr2O7?
This law states "two samples of a given compound are made of the same elements in the same proportions, no matter their source"
What is the law of constant composition?
The molecular and electron geometry of XeCl4
What is square planar (for molecular) and octahedral (for electron)?
A metal (M) has a work function of 3.69 × 10-19 J. When electromagnetic radiation of a particular wavelength is shone upon the metal surface, photoelectrons having a maximum speed of 4.20 × 106 m/s are ejected.
What is the wavelength (in nm) of the electromagnetic radiation that struck the metal surface?
What is 23.9 nm?
Draw the molecular orbital theory for C2
What is:
(check the google drive folder)
Balance the following: KNO3 + C12H22O11 => N2 + CO2 + H2O + K2CO3
What is:
48 KNO3 + 5 C12H22O11 => 24 N2 + 36 CO2 + 55 H2O + 24 K2CO3
A sample of naturally occurring silicon consists of Si-28 (amu = 27.9769), Si-29 (amu = 28.9765) and Si-30 (amu = 29.9738). If the atomic mass of silicon is 28.0855 and the natural abundance of Si-29 is 4.67%, what are the natural abundances of Si-28 and Si-30?
What is:
Si-28 => 92.23%
Si-30 => 3.10%