Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter2: Atoms Molecules And Ions
Section: Chapter Questions
Problem 165SCQ
Related questions
Question
100%
Would someone mind double checking my review on atoms and moles… I just want to make sure I am understanding! Thank you!
![3A
Periodic Table of
15
Ne 28
14
13
CN
Orygen
16.00
Fluorine
19.00
Nen
20.18
Mitrogen
tahan
moles of Au = mass Au
3x 31.10 = 93
95.3g
pter 5
molar mass Au
Section 5.1
23
93.3
196.97
6.022 X 10 items
.474mol
Calculate the following:
4) Gold is often sold in units of troy ounces. There are 31.10 g per troy ounce.
I mol items
a) How many atoms of gold are in 3.00 troy ounces?
molar mass Au = 196/97
31.109 per troy oz
.474mot Au . 6.022 x 10 atoms
23
23
=2.85 X 10 a toms
Inol Au
b) If the current value of gold is $1230 per troy ounce what would it cost to buy 1.516 moles of gold?
1.516 mates Auo 196.97
I troy ounce
31.10g
9.601 Au troyoz
%3D
Section 5.2
$1230.9.601 =1809.84 串1181×10'
Know: 59 Need: #of atoms
C: 6(12.01)' 72.06
A: 12 (1.01)
0: 6 (16.00) 96
5) The number of Çarbon atoms in 5.00 g C6H12O6
5.00g
150.18g/mol
Mass
Molar mass
=.0278 mol x 6=
• 1665001b68 Cmol
12.12
•I665001668 Coot x 6,022X lotatoms
23.
I mot
23
1.00X 10
180.18
189/mol
Section 5.3
belo
Catoms
6) Determine the mass percent of oxygen in Ba(CIO3)2
percent by mass of
elemen't
n X molar muss
Ba: 137.33
(1:2(35.45)
0:6(16.00) 96. n
X 100
molar mass of
Com pound
304.23
6.16
96
X 160 =
32%
X loo =
304,23
304.23](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc8854ffd-431b-44a2-b47e-daec534c3a26%2F4d9f9948-3341-4b2d-a9c2-058be498bc49%2Foeg6jxf_processed.jpeg&w=3840&q=75)
Transcribed Image Text:3A
Periodic Table of
15
Ne 28
14
13
CN
Orygen
16.00
Fluorine
19.00
Nen
20.18
Mitrogen
tahan
moles of Au = mass Au
3x 31.10 = 93
95.3g
pter 5
molar mass Au
Section 5.1
23
93.3
196.97
6.022 X 10 items
.474mol
Calculate the following:
4) Gold is often sold in units of troy ounces. There are 31.10 g per troy ounce.
I mol items
a) How many atoms of gold are in 3.00 troy ounces?
molar mass Au = 196/97
31.109 per troy oz
.474mot Au . 6.022 x 10 atoms
23
23
=2.85 X 10 a toms
Inol Au
b) If the current value of gold is $1230 per troy ounce what would it cost to buy 1.516 moles of gold?
1.516 mates Auo 196.97
I troy ounce
31.10g
9.601 Au troyoz
%3D
Section 5.2
$1230.9.601 =1809.84 串1181×10'
Know: 59 Need: #of atoms
C: 6(12.01)' 72.06
A: 12 (1.01)
0: 6 (16.00) 96
5) The number of Çarbon atoms in 5.00 g C6H12O6
5.00g
150.18g/mol
Mass
Molar mass
=.0278 mol x 6=
• 1665001b68 Cmol
12.12
•I665001668 Coot x 6,022X lotatoms
23.
I mot
23
1.00X 10
180.18
189/mol
Section 5.3
belo
Catoms
6) Determine the mass percent of oxygen in Ba(CIO3)2
percent by mass of
elemen't
n X molar muss
Ba: 137.33
(1:2(35.45)
0:6(16.00) 96. n
X 100
molar mass of
Com pound
304.23
6.16
96
X 160 =
32%
X loo =
304,23
304.23
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