CH101.001 (Blackstock, 808) Exam 1
February 4, 2008
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Part 1. Multiple choice questions (3 pts each, 75 pts). Enter answers on the scantron sheet.
1. Which of the following is not an SI base unit?
Ch. 1: Classifying Matter
CLASSIFICATION OF MATTER
Matter is anything that occupies space and has mass.
Matter comes in three different states.
Atoms/molecules are tightly packed
Does not flow
Atom/molecules are tightly packe
Mon Apr 18, 2016
1. MEASURING E, CALORIMETRY AT CONSTANT VOLUME
A. Because E = q + w, we can determine E by measuring q and w
E = q + w
E = q - PV
B. In practice, it is not possible to observe the temperature changes of the
Chapter 4: The Periodic Table and Electron Configurations
Order elements by atomic mass
Saw a repeating patter of properties
Periodic Law: when the elements are arranged in order of increasing
atomic mass, certain sets of properties
The electron configuration of the d block elements has trends that are
different from the main group elements.
o The first row (4 and 3d orbits are very close in energy)
In a multi-electron system, electrons are
Circulation & Gas Exchange
How Do We Move and Exchange Materials Throughout the Body?
Circulation: facilitating exchanges with the environment
Respiration: facilitating gas exchange across specialized surfaces
Hemoglobin: protein molecule in red blood cel
Chemical Changes and Chemical Equations
Changes in Matter
Physical changes are changes that alter the state or appearance of the
matter without altering the composition
o i.e. evaporation, freezing, melting, sublimation (solidgas),
1. YOU CANT SPELL STATE FUNCTIONS W/O FUN
A. In thermodynamics, a state function is a property that depends only on the current
state of the system.
Its not how you get there, only where you are.
2. STATE FUNCTIONS
A. The energy of a system
1. THE STRUCTURE OF A GAS
A. Gasses are composed of particles that are flying around very fast in their
They travel in a straight liner until they encounter another particle or a surface.
2. GASES PUSHING
A. Gas molecules are c
EIGHT (8) VALENCE ELECTRONS
Atoms with full valence shells are very unreactive.
All noble gases (except He) have 8 valence electrons.
METALS VS NONMETALS
Metals tend to loose electrons during a chemical reaction.
o Conduct Energy
Ch.1: Atoms and Elements
STRUCTURE OF AN ATOM
Two main parts:
o Electrons (e-)
o Live in the nucleus
o Has a mass of 1.67262x10-27 kg (1 amu)
o Has a charge of 1+
o Live in the nucleus
o Mass = 1 amu
o No Char
Atomic Mass and Mass Spectrometry
THE ATOMIC MASS
Many elements have multiple, stable isotopes.
The ratio of different isotopes within a sample is constant.
I.e. Chlorine (Cl)
o Chlorine has 2 common isotopes (35Cl and 37Cl).
We calculate the average of t
THE IDEAL GAS LAW
1. STANDARD CONDITIONS
A. Because the volume of a gas varies with pressure and temperature. Chemists have
agreed on a set of conditions to report our measurements so that comparison
2. BOYLE, CHARLES, AND AVOGARDO
3. IDEAL GAS LAW
When ionic compounds dissolve in water, the anions and cations are
separated from each other. This is called dissociated.
When compounds containing polyatomic ions dissociate, the polyatomic
group stays together as one ion.
Weak v. Strong
Limiting Reagents and Theoretical Yield
Look at the combustion of H2:
o 2H2 + O2 2H2O
The chemical equation states that 2 equivalents of H2 reacts with 1
equivalent of O2 to produce 2 equivalents of H2O.
What happens if there are 3 equiv
Chapter 3 Outline
End of Chapter Problems for Practice: 35, 37, 39, 41, 43, 45, 57, 59, 61, 63, 65, 67, 69 (you can
use the electromagnetic spectrum in the book, you do not need to memorize each regions
frequency/wavelength), 71, 79, 81, 83, 87, 91
Chapter 4 Outline
End of Chapter Problems for Practice: 41 (you will not need to memorize the names), 43, 45, 47,
49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 71, 73, 75, 77, 79, 81, 83, 85, 89, 97, 103, 109, 115
Key concepts and learning goals. Be able to:
February 5, 2015
The purpose of this experiment was to separate the five components of Froot Loops
cereal, which are sugar, reduced iron, zinc oxide, stearic acid, and red dye. This experiment was
Balanced chemical equations relate the mole ratios of the chemicals.
When working with stoichiometry, make sure to balance the equation
first, then answer the question.
Mass A Moles of A Moles
Unit Conversion, Dimensional Analysis, and
SOLVING CHEMICAL PROBLEMS W/ UNITS
Always write every number with its units
Always include units within calculations
Arrange conversion factors so that the starting units canc
Valence Bond Theory
Valence Bond Theory: Orbital Overlap
Bonds between atoms occur when the orbitals on those atoms
interacted to make a bond
Valence Bond Theory
The valence electrons of the atoms in a molecule reside in quantummechanical atomic orbitals
Ch.3: The Nature of Light
Waves and Stuf
The world of Chemistry (and the world, in general) runs on Quantum Mechanics
Everything at the molecular scale, behaves as a wave.
Waves = Amplitude: distance from equilibrium to the highest po
Ch. 1: The Scientific Approach to Knowledge
GATEHRING EMPIRICAL KNOWLEDGE - OBSERVATION
Some observations are descriptions of the characteristics or behavior of
Some observations compare a characteristic to a standard numerical
Measurements and Significant Figures
CERTAINTY AND UNCERTAINTY
In a scientific measurement, every digit written is certain except for the
The last digit is estimated, and unless stated otherwise, has an
uncertainty of +/- 1.
CHAPTER 10: INTRO TO
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