Determination of density of solids and liquids emphasizing
measurement and significant figures
Charles L. Burns, Jr.* and Joe Student, Wake Technical Community College
January 1, 2011, CHM151 Section 0001
Density is a physical property that is us
Exam 2 Preparation:
1. Review sections 4.2 to 4.6.
2. Review sections 5.1 to 5.10 (except naming organic compounds in section 5.6).
a. Memorize polyatomic ions from handout
b. Calculate molar mass.
c. Calculate % composition of an element in a compound.
Exam 3 Preparation:
1. Review Chapter 6
a. Octet rule
i. For ions
ii. For covalent bonding
i. Single bonds
ii. Double bonds
iii. Triple bonds
c. Electronegativity & Polarity
i. Electronegativity definition
ii. Electronegativity difference and p
Elements to Memorize
Know the Name, Symbol & Special Notes for the following elements:
Exam 5 Prep
1. Chapter 9
a. Molarity calculations
i. Molarity of a solution
ii. Mass of solute needed
iii. Volume of solution needed
b. Dilution calculation
c. Solution stoichiometry
i. Mass known moles known moles unknown molarity or volume unknown
CHM 151 Exam 1 Prep
1. HandoutsFrom the Elements to Memorize handout know the name, symbol and special note
for each element on the table.
2. Lecture Series 1
a. Scientific Method
Part 1: Specific Heat of a Metal
Mass of metal (g)
Starting temperature of metal (C)
Volume of water in calorimeter (mL)
Mass of water in calorimeter (g)
Initial temperature of water
C( s )+O 2 ( g) C O2 ( g) H 1=393.5
3 N i ( s) +C (s ) 3 C (s ) H 2=67.4
2 N i ( s) +O2 (g ) 2O( s) H 3=293.7
2 N i 3 C ( s) +5 O 2( g ) 6O (s )+2 C O 2 ( g) H=?
H 2 (g )+ F 2 ( g) 2 H F ( g) H 1=272.5
P b( s) + F2 ( g) Pb
Post Lab for Spectrophotometric Study of the Rate of a Chemical Reaction
You completed 3 trials, summarized below:
Absorbance at 20 seconds: _
Absorbance at 40 seconds: _
Magnitude of slope for trial 1: _
*Note: To find magnitude of slope:
1. Question Physics:
A. What is the isomeric relationship between these 2 molecules. (Answer either:
conformational isomer, stereoisomers, or constitutional isomers)
- top molecule is cis-1,4,-dimethyl cyclohexane
- bottom isomer is trans-1,4-dimethylcycl
Question 1: Oak
For part A) given the reaction energy diagram and the transition state, write the name of the
For part B) write the name of the product acid. If the answer is an ion, include ion in the name.
A) draw cis-2-fluoro
Question 1: Identify each of the following species for the following acid-base reactions (the
equilibrium lies to the right in each case, i.e., the product side is favored.):
1) Type in the names (do not type in formulas.)
2) If the species is an
Question 1: Australia
You are given a Bronsted acid/base reaction along with its transition state. BUT the transition
state does not include the partial charges.
For parts A&B) Give the partial charge of the indicated atom in the transition state
Last name _first name_
Last name _first name_
a) Write the IUPAC name.
a) Write the IUPAC name.
10H22 1 pt
b) Give the molecular formula in the format CxHy
Question 1: Sine
Question 2: Secant
You are given the ketone, acetone. Select ALL the molecules in the list which can form a
hydrogen bond with acetone.
Question 3: Cotangent
For this question, a liquid is going to be added to water. Based on the mixture
OMIT all C atoms
OMIT all H atoms that are bonded to C atoms
OMIT all bonds between these C and H atoms
KEEP all other double or triple bonds.
Molecular Formula of Alkyl-Substituted Cycloalkane:
Use the format: CxHy
C = vertices
Question 1: Just need part C and D (refer to screenshot below of
INCORRECT answer to D)
A.draw the SKELETAL STRUCTURE (not lewis structure)
B. draw the SKELETAL STRUCTURE (not lewis structure)
9. 5/6 points | W
Fill in the blank with the number from the reagent table below that corresponds to the reagent system you would
use for the synthetic steps needed for the conversion indicated mm: they are needed in 3 or less steps. You
only have access
14.2/5 points | Previous Answers
Input the number of the molecule that is in greatest abundance at equilibrium.
B) Select the TWO molecules that are in greatest abundance at equilibrium (these TWO will be the
major organic products).
1. 0/4 points | Previous Answers
Input the letter that corresponds to the major organic product.
Input the letter. F
Solution or Explanation
Since the tert-butyl will be in the equatorial position, the Br will be in the axial position. The
Final Exam Practice
Note: These problems are intended to help you prepare for your exam. Do not assume that these are the only
problems you need to do. You should review old tests, quizzes, labs, notes, etc.
You will NOT be able to use a calculato
Nomenclature Worksheet #2
1. In ionic compounds, _ lose their valence electrons to form positively charged _
2. How many electrons will aluminum gain or lose when it forms an ion?
3. What is the symbol for the ion with 19 protons and 18 electrons
Intermolecular forces are attractive forces between neighboring molecules.
These forces are known collectively as van der Waals forces.
The magnitude (and type)
of intermolecular forces can
be sufficient to hold the
but they are different
(different boiling points,
different potential energies)
Chapter 10: Muscle
Wake Technical Community College
Dr. K. Pescosolido
Ch 10: Muscle Tissue
types of muscle tissue:
Skeletal muscle, cardiac muscle, smooth muscle
Composes 40-50% of weight of the adult
skeletal muscles in the