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# CHE 110 Study Guide - Grou, Glycerol, Sulfur

Department
Chemistry
Course Code
CHE 110
Professor
All

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Fundamental Standards:
F1 Student can balance and interpret the meaning of chemical
formulas and equations.
Homework Quiz
Quiz 3 Question 1:
1. When the following chemical equation is balanced, what is the sum of the
coefficients in the equation?
NaNO3 NaNO2 + O2
Explanation:
To begin we need to put a two in front of NaNO3 so we have 2 Na, 2 N, and 6 O on the
reactant side. Then we need to place a two in front of NaNO2 so that on the product side
we have 2 Na, 2 N, and 6 O. The final balanced equation is:
2NaNO3 2NaNO2 + 1O2
Therefore the sum of the coefficients is 5 because 2 + 2 + 1 = 5.
Project
In the One Ton Challenge project I had to figure out how many miles less I would have
to drive to save one ton of CO2.
Explanation:
I have figured out that I drive an average of 60 miles per week. That means I drive 3,120
miles per year.
60 m x 52 weeks = 3,120 miles/year
wk year
To figure out the rest I need to do a stoichiometry problem. One gallon of gas is equal to
0.00858 tons CO2.

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1 ton CO 2 x 1 gallon C8H18 x 25 miles = 2,914 miles
0.00858 tons CO2 1 gallon C8H18
To save one ton of CO2, I would have to drive 2,914 miles less per year.
Exam Question
Exam 1 Question 1:
1. The Marsh test for arsenic is base upon the production of arsine gas (AsH3)
where hydrogen gas reacts with arsenic (III) oxide (AsO3) to produce arsine gas
and water. Write a symbolic representation for the reaction. When the equation is
correctly balanced, what is the sum of the coefficients?
a. 8 b. 10 c. 12 d. 14 e. 15
Explanation:
The equation: AsO3 + H2 AsH3 + H2O
The balanced equation: 1AsO3 + 6H2 2AsH3 + 3H2O
The sum of the coefficients is 12, so the answer is C.

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F2 Student can utilize appropriate chemical terminology to
describe phenomena.
Homework Quiz
Quiz 1 Question 1:
1. What is the term for the region of very high density in the center of the atom?
A. atomic center
B. atomic nucleus
C. none of these
D. atomic kernel
E. atomic core
Explanation:
The answer is B. because the center of the atom is the nucleus, which consists of protons
and neutrons
Project
The following information is from the Napoleon’s Buttons project:
ostarch (plants) and glycogen (animals)
Explanation:
As you can see I can utilize chemical terminology to describe two different types of
polysaccharides.
Exam Question
Exam 1 Question 9:
9. When the outermost electron is removed from a particular atom, the name for the
process is called…