ruisi (hhr239) – Homework 6 (Chapter 3) – sutcliffe – (50985)
1
This
printout
should
have
20
questions.
Multiplechoice questions may continue on
the next column or page – find all choices
before answering.
This homework is entirely on Chapter 3 to
give you some Quest practice on moles, grams
and stoichiometry.
001
10.0 points
Avogadro’s number is really big.
If you had
6.02
×
10
23
dollars, and could spend it at $1
billion (10
9
) per second for the rest of your
life (let’s say 80 years), approximately what
percentage of your original money would you
have left when you die?
1.
95%
2.
100%
3.
90%
4.
50%
5.
10%
6.
75%
7.
0%
002
10.0 points
Which one has the greatest number of atoms?
1.
3.05 moles of argon
2.
All have the same number of atoms
3.
3.05 moles of helium
4.
3.05 moles of water
5.
3.05 moles of CH
4
003
10.0 points
If one electron weighs 9
.
0
×
10

28
grams, what
is the mass of one mole of electrons?
1.
5
.
0
×
10

23
grams
2.
5
.
4
×
10

4
grams
3.
9
.
0
×
10

18
grams
4.
1
.
5
×
10

51
grams
5.
5
.
0
×
10

24
grams
004
10.0 points
What
is
the
molar
mass
for
fluoxetine
(C
16
H
16
F
3
NO), also known as Prozac
circlecopyrt
R
?
1.
295.3 g/mol
2.
281.3 g/mol
3.
297.1 g/mol
4.
279.3 g/mol
005
10.0 points
Calculate the density of propanol C
3
H
8
O if
you know that there are 1
.
069
×
10
25
molecules
of propanol in 1.35 L.
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 Fall '07
 Fakhreddine/Lyon
 Chemistry, Mole

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