Experiment 9
Enthalpy of Vaporization of Ethanol
by
Chem Lab 112October 22, 2015
The enthalpy of vaporization of ethanol was determined by vapor pressure measurements.
The enthalpy of vaporization of
Chemistry Chapter 2 measurements in chemistry Physical Quantities Two Parts Number Unit Both Parts are required for a measurement Quantity does not depend on unit Number does i.e. 1 mile = 5280 feet
The hydration number of CuSO4 and MgSO4 was found by heating solutions in a crucible. There was more hydration present in MgSO4 than in CuSO4. The variance is going to change because of different amou
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. How much energy (in Joules) does a mole of photons with a frequency of 5.50 MHz
have?
a) 2.19 1012 J
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a) A
b) B
c) C
d) D
e) E
2. Which of the following correctly lists the compounds in order of increasing melting
point?
a) potassi
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. How much energy (in Joules) does a mole of photons with a frequency of 5.40 MHz
have?
a) 2.15 1012 J
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a) A
b) B
c) C
d) D
e) E
2. What is the formula of the ionic solid formed from potassium ions and dichromate ions?
a) KCr2 O7
b)
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a) A
b) B
c) C
d) D
e) E
2. Which of the following is true?
i. Pi () bonds have electron density on the internuclear axis.
ii. Ac
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a) A
b) B
c) C
d) D
e) E
2. Atoms of which of the following elements are the most paramagnetic?
a) sodium
b) silicon
c) phosphoru
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a) A
b) B
c) C
d) D
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2. What is the oxidation state of carbon in CH2 F2 ?
a) 0
b) 2
c) 4
d) 6
e) 8
3. Which of the following
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. What is the formula of the ionic solid formed from aluminum ions and hypochlorite
ions?
a) AlClO
b) A
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. Which of the following correctly lists the compounds in order of increasing boiling point?
a) O2 (l)
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a) A
b) B
c) C
d) D
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2. How many electrons in an atom can have the quantum number n equal to 4 and ml equal
to -1?
a) 0
b) 2
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a) A
b) B
c) C
d) D
e) E
2. What is the electron configuration of the most common ion that sodium forms?
a) 1s2 2s2 2p3
b) 1s2 2s
Chem 112 Fall 2015. Exam 3, Section 1. Form A, page 2
1. What form is this exan'l'. The form is listed on the top of this page.
b B
e C
d D
e] E
2. What is the molecule.- .
f nitrogen triuoride?
a
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a) A
b) B
c) C
d) D
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2. Which element forms a -1 ion with the following electron configuration?
1s2 2s2 2p6
a) oxygen
b) magn
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b) B
c) C
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2. How many valence electrons does an atom of chlorine have?
a) 2
b) 6
c) 0
d) 7
e) 8
Solution:
chlorine
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2. What group does calcium belong to?
a) alkali metal
b) alkaline earth metal
c) chalcogen
d) halogen
e)
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a) A
b) B
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2. Which of the following is true?
i. Light is composed of particles.
ii. C60 molecules never behave as
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a) A
b) B
c) C
d) D
e) E
2. Which of the following is true?
i. Photons have no mass.
ii. For electromagnetic radiation, the short
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a) A
b) B
c) C
d) D
e) E
2. Which of the following pairs of elements consists of a metal and a nonmetal?
a) oxygen, neon
b) beryl
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a) A
b) B
c) C
d) D
e) E
2. What is the wavelength (in meters) of an electron travelling at 6.50 106 m s1 ?
Remember that 1 Joule
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a) A
b) B
c) C
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2. Which of the following is true?
i. There are five d orbitals in every shell.
ii. The larger the princ
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a) A
b) B
c) C
d) D
e) E
2. Which of the following is true?
i. Hydrogen bonding only occurs when hydrogen is bound to oxygen or f
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a) A
b) B
c) C
d) D
e) E
2. If the pressure of nitrogen gas is 3.00 atm at 20.0 C in a 2.00 L container, how many
molecules of ni
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. How much energy (in Joules) does a mole of photons with a frequency of 9.80 MHz
have?
a) 3.91 103 J
b
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. How many electrons in an atom can have the quantum number n equal to 2 and ms
equal to ?
a) 0
b) 1
c)
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a) A
b) B
c) C
d) D
e) E
2. Which of the following is true?
i. The rate of diffusion of a gas is proportional to the mass of the
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a) A
b) B
c) C
d) D
e) E
2. What is the hybridization of the center atom of carbon dioxide?
a) sp
b) sp2
c) sp3
d) sp3 d
e) sp3 d
1. What form is this exam? The form is listed on the top of this page.
a) A
b) B
c) C
d) D
e) E
2. What is the total number of valence electrons that BrO3 has?
a) 23
b) 26
c) 30
d) 22
e) 24
3. Which o
8/21/17
1st Lecture
of Ch. 7
This is our textbook.
It is a very good General
Chemistry textbook.
You can buy any edition
of the textbook. They
are all about the same.
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editions on the
Experiment 11
Quality of Life in the Absence of Quantum Mechanics
by
Jacob Anderson
Chem 112-13 Bremansu-Osa Andrews
October 19, 2016
Without an understanding of quantum mechanics, life would be much
Experiment 9
Enthalpy of Vaporization of Ethanol
by
Jacob Anderson
Chem 112-13 Bremansu Osa-Andrews
October 26, 2016
Shane Boysen
A vacuum with vapor pressure measurements was used in order to determi
Experiment 1
Density
by
Jacob Anderson
Chem 112-13 Bremansu Osa-Andrews
September 14, 2015
Density is defined as the degree of compactness of a substance, it is derived from the relationship
between m
Experiment 6 Background
Enthalpy of Water Formation from Phosphoric Acid Neutralization
by
Jacob Anderson
Chem 112-13 Bremansu Osa-Andrews
November 16, 2016
Calorimetry can often be described a proces