# What is the energy, frequency and wavelength of light associated ```What is the energy, frequency and wavelength of light associated with an emitted photon in a hydrogen
transitioning from the n=5 to n=1 level?
A monochromatic beam of light with a total energy of 2.5J contains 8.56x10-4 mols of photons. What is
the wavelength of the beam.
A compound made up of C,H, and Cl contains 55.0% Cl by mass. If 9.00 g of the compound contains
4.19x1023 H atoms, what is the empirical formula of the compound?
Propane burns in oxygen to produce carbon dioxide gas and water. Write a balanced equation, and
calculate the number of liters of carbon dioxide measured at 3 atm and 60 C that could be produced
from 7.45 g propane.
Quantum number review
n= any integer :describes energy shell
l=n-1: describes subshell
ml= -l….l : describes orbitals
ms= &frac12; : describes electrons.
example: if n=4 what quantum numbers are possible? How many electrons are in this energy level?
For the given quantum numbers how many electrons are present?
n=5 and ms=+&frac12;?
n=5 and ml= + and ms=-&frac12;
A lithium atom has an average speed of 2000. m/s has its uncertainty of velocity within 700.0 nm/s.
What is the uncertainty in the position?
For each of the following write the electron configuration
Cd
Cd2+
Ag
Ag1+
Zn
Zn2+
Mn
Mn2+
Write the molecular formula for each.
Morphine
Methamphetamine
Generate the MO diagram for CO and CO+ given that the diagram looks like Li2 through N2. Find the bond
order. Which is more stable?
Of the following which exhibit hydrogen bonding.
PF3
HCl
CH3CH2OH
CH3SH
KrF4
C6H6
CH2ClCH2Cl
HNO3
ClCCCl HOCH2CH2OH (HO)3PO
N2O
What is the difference between Shrodinger’s and Rydberg’s treatment of the hydrogen atom?
When do real gasses deviate most from the ideal gas law? Why?
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