Practice Exam 3
Identify the choice that best completes the statement or answers the question.
Useful equations and constants
ln([R]t / [R]0) = -kt t1/2 = ln(2) / k 1/[R]t - 1/[R]0 = kt [R]0 - [R]t = kt
k = Ae-Ea/RT ln(k1/k2) = Ea/R (1/T2 - 1/T1) R
Exam 2 Practice Test
R = 0.08206 Latm/Kmol
Sg = kH*Pg
Psoln = Xsolv*Psolv
Tbp = Kbp*msolute
Tfp = Kfp*msolute
2*(side)2 = (diagonal)2
1. Arrange the cubic unit cells in order of decreasing packing efficiency
Practice Exam 1
Information you might need:
1 atm = 760 mm Hg = 101.3 kPa = 760 torr = 14.7 psi = 1.013 bar
R = 0.08206 L*atm/K*mol = 8.3145 J/K*mol
PV = nRT
P1V1/T1 = P2V2/T2
Pa = XaPtot
urms = (3RT/M)
1. Name the strongest intermolecular force in
If metallic copper is immersed in a solution containing zinc ions, there is no apparent reaction. If
zinc metal is immersed in a solution containing copper (II) ions, a black coating of fine copper
crystal spontaneously forms
A student reacts 6.54 grams of zinc with 40 mL of 6.00 M hydrochloric acid. After the
reaction is complete, water is added to the resulting solution to make the volume 50.0 mL.
a. Write the balanced chemical equation
A. Preparation of 2 M ZnCl2 solution
Write the balanced stoichiometric equation for the reaction of the zinc metal and the
Mass of Zn powder
Moles of Zn
Volume of 6 M HCl
Moles of HCl
Chapter 4 Notes
Bonding and Molecular Structure: Orbital Hybridization
Two Theories of Bonding
MOLECULAR ORBITAL THEORY Robert Mullikan (1896-1986)
valence electrons are delocalized
valence electrons are in orbitals (called molecular orbitals) s
Chapter 3 Notes
Bonding and Molecular Structure
Problems and questions
How is a molecule or polyatomic ion held together?
Why are atoms distributed at strange angles?
Why are molecules not flat?
Can we predict the structure?
Chapter 2 Notes
The Structure of Atoms and Periodic Trends
Pauli Exclusion Principle
The 1s orbital, and any other orbital, can be occupied by no more than two
electrons, and these two electrons must have opposite spin
There are always n subshell
Chapter 1 Notes
The Structure of Atoms
Chemical elements in the same group have similar properties, but why?
All elements of a group have the same number of electrons in the outer shell
Electromagnetic radiation include