Textbook: Chemistry the Central Science - 12th Edition Book Chapter 6
frequency: AM radio 1010 KHz =
E( AM radio) = h * 1010 x103 (1/s) = 6.692 x10-28 J
frequency: FM radio 98.3 MHz =
Thus, = 3
E = h = hc/
G = nFE
Moles of e = It/F
4.5kBT = hc/
E = E (RT/nF) 2.303 logQ
E = Z2ER(1/n2)
= E (RT/nF) lnQ
E = (RT/nF) 2.303 logK
= (RT/nF) lnK
q = 4r2 5.67 108 T4
E = E
The University of Sydney
COMBINATION CHEM1001/1101 EXAM
FIRST SEMESTER EXAMINATION
JUN 2003 / NOV 2003
TIME ALLOWED: THREE HOURS
GIVE THE FOLLOWING INFORMATION IN BLOCK LETTERS
INSTRUCTIONS TO CANDIDATES
Diborane (B2H6) is a highly reactive compound, which was once considered as a
possible rocket fuel for the US space program. Calculate the heat of formation of
diborane at 298 K from the following reactio
The structure of morphine is given below.
Name the functional groups in morphine that have been highlighted by the boxes.
a = amine (3)
b = alkene
c = alcohol
FUNDAMENTALS OF CHEMISTRY 1A (CHEM1001) - June 2008
9.993 1014 s1
6.622 1019 J
H N H
When a 1.00 g sample of carbon is burnt in a calorimeter to produce CO2(g), a
temperature rise of 6.66 C is observed. When a 1.00 g sample of solid NH4NO3 is
decomposed in the same calorimeter, a temperature rise of 0.300 C i
Complete the following table.
Number of bonding
Number of nonbonding electron
pairs on central atom
H N H
O C O
Briefly explain the concept of resonance. Give at least one example.
If two or more Lewis structures are equally valid for a molecule, the true
structure is none of the structures that is drawn, but an average made
FUNDAMENTALS OF CHEMISTRY 1A (CHEM1001) - June 2005
When more than one Lewis structure can be drawn for a molecule, the true structure is
an average (called a resonance hybrid) of all the structures drawn. In some cases one or
Healthcare providers questions:
(1) Outcome measures are
(a) the gold standard for measuring quality care
(2) It is easier to measure negative outcomes rather than positive outcomes
(3) Which of the following ar
Modern Periodic Table: Elements are listed in order of increasing atomic number rather than
increasing relative mass.
Metals occupy the left side of the periodic table and have similar properties: They are good
conductors of heat and electricity; they can
Chemistry 25- Chapter 4
An atom is the smallest identifiable unit of an element.
Daltons atomic theory has 3 parts: 1. Each element is composed of tiny indestructible particles
called atoms. 2. All atoms of a given element have the same mass and other pro
Calculate the # of atoms in 2.45 mol of copper. 1.48 x 10 24 Cu atoms
Calculate the moles of sulfur in 57.8 g of sulfur 1.80 mol S
How many aluminum atoms are in a 16.2 g can?3.62 x 10 23 Al atoms
How many moles are in 50.0 g of
Chapter 3: Energy and Matter
Chapter 3: Matter and Energy
Matter: anything that occupies space and has mass.
Matter composed of tiny little particles: atoms/molecules.
First suspected by Leucippus and Democritus
~500 years BC:
Everything is c
Chapter 2: Measurement and Problem
Scientific Notation and Exponent Check
Write the numbers below in scientific notation:
Convert these to normal numbers:
7.85 x 10-3
2.9401 x 107
Do these calculations without a
Chapter 6: Chemical Composition
Moles the chemists dozen
Formula Masses and Molar Masses
Conversions from quantity to moles to mass & back
Chemical Formulas and % Composition
Determining Empirical and Molecular Formulas
Lab 1: Investigating Density
Learn how to use common lab equipment:
top loading balances
Practice making and reporting measurements correctly.
Master the concept of density as an intensive property
Practice Problems on Unit Conversion
Using Dimensional Analysis (Factor Label Method)
These are practice problems. It is assumed that you have already been introduced to the method
of dimensional analysis. Answers are provided at the end of this document.
Additional Practice Questions for Exam 1
Q1. Water has a density of 1.00 g/mL at room temperature. What is the
volume of 1.00 kg of water?
Q2. What is the volume of 50.0 grams of lead? (The density of lead is 11.3
Q3. Name each of the following i
Practice Questions for Midterm Exam 2
Q1. Predict the formulas of the products, include phase symbols, and then balance the following
a. LiOH (aq) + H2SO4 (aq)
b. K2CO3 (aq) + HNO3 (aq)
Q2. Write the balanced overall equation, the total ionic
REVIEW SHEET FOR Midterm 1
1. What is matter?
2. Physical vs. chemical properties (whats the difference?), examples
3.Be able to define and explain the differences between the categories of
matter: pure substances, mixtures, elements, compounds.
EXTRA CREDIT QUESTIONS
Show all your work clearly with each step well explained to get complete credit for your work.
Q1. Calculate the mass percent water in an unknown hydrate using the data below. Show your
steps and write answers in significant figure
Practice Questions from Chap 8
Q1. Given the following reaction:
Ca(OH)2 (aq) + H3PO4 (aq)
H2O (l) + Ca3(PO4)2 (s)
If you start with 0.431 moles of H3PO4, how many moles of H2O will be formed?
Q2. Given the unbalanced equation:
MnO2 + Al
Mn + Al2O3
Question on Limiting Reactant
Q1. Consider the reaction N2 (g) + O2 (g) 2 NO (g).
a. How many g NO can be produced when 25.0 g of nitrogen reacts?
b. How many g NO can be produced when 25.0 g of oxygen reacts?
c. Based on your answers in a and b, predict
Chem 25 Practice Mid-term Exam
1. The name of the compound NH4ClO3 is:
10. What are the elements that occur as diatomic
2. The name of the compound Fe2O3 is:
11 What is the total number of atoms in a molecule of
3. What is the
Welcome to CIS 21JA
This is an online section where you do all class work through Catalyst, but there are 3 times this quarter that
you must be in class on campus: the 2 midterm exams and the final exam. Please check the class calendar and
Chemistry Chapter 1
Matter and measurements
1.1 The Central Science
Chemistry is the study of the nature, properties and transformations
Matter is anything that has mass (weight) and occupies space, that
is, things you can see, tou
Complete the following chemical reactions, be sure to balance and specify which the
state of the matter?
Magnesium hydroxide + phosphoric acid
3 Mg(OH)2 (aq) + 2 H3PO4 (aq) Mg3(PO4)2 (s) + 6
Chem 30A Exam 2
Avogadros Number = 6.022 x 1023
Reaction between Lead(II) nitrate with aqueous Phosphoric acid produces two products.
a. Write a balanced chemical equation (include all states of matter)
b. What type of chemical reaction (combination