Review I Constants I Periodic Table On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 % for Ga and 39.89 % for "Ga. What is the atomic mass of gallium for this location? The mass of 0 Ga is 68.7200 amu. The mass of 71 Ga is 70.9200 amu. Express your answer to two decimal places and include the appropriate unite
Review I Constants I Periodic Table On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 % for Ga and 39.89 % for "Ga. What is the atomic mass of gallium for this location? The mass of 0 Ga is 68.7200 amu. The mass of 71 Ga is 70.9200 amu. Express your answer to two decimal places and include the appropriate unite
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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<W3 Assignment 1: MyMastering Chapter 4 Homework
+ Atomic Mass Calculations
W1 Assignment 1: MyMastering x
Atomic mass is a weighted average of the masses of the naturally
occurring isotopes of that element. For example, consider
isotopes of lithium:
Isotope
6 Li
'Li
lock
MasteringChemistry: W3 Assig X
G element with the atomic numbe X b Success Confirmation of Quest x +
A session.masteringchemistry.com/myct/itemView?assignment ProblemID=190556606&offset=next
esc
Abundance Mass
(amu)
(%)
7.5
6.015
92.5
The atomic mass is therefore
(0.075 x 6.015) + (0.925 x 7.016) = 6.94 amu
Notice that the atomic mass is closer to 7 than it is to 6. That is
because the heavier isotope is more abundant.
7.016
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4,952
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JUL
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The mass of 69 Ga is 68.7200 amu. The mass of 7¹ Ga is 70.9200 amu
Express your answer to two decimal places, and include the appropriate units.
View Available Hint(s)
F4
70
R
Review I Constants I Periodic Table
On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 % for 69 Ga and 39.89 % for 71Ga. What is the atomic mass of
gallium for this location?
0
Submit
Part B
Value
28 Si
The astronaut then measures the abundance of silicon on the new planet, obtaining the following results:
Abundance Mass
Isotope (%) (amu)
73.71
27.98
29 Si
30 Si
F
Help
μA
%
5
14.93
11.36
9
V
What is the atomic mass of silicon for this planet?
Express your answer to two decimal places, and include the appropriate units.
F5
28.98
T
29.97
Units
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← → C
b
File Edit View History Bookmarks Profiles Tab Window
<W3 Assignment 1: MyMastering Chapter 4 Homework
+ Atomic Mass Calculations
W1 Assignment 1: MyMastering x
Atomic mass is a weighted average of the masses of the naturally
occurring isotopes of that element. For example, consider
isotopes of lithium:
Isotope
6 Li
'Li
lock
MasteringChemistry: W3 Assig X
G element with the atomic numbe X b Success Confirmation of Quest x +
A session.masteringchemistry.com/myct/itemView?assignment ProblemID=190556606&offset=next
esc
Abundance Mass
(amu)
(%)
7.5
6.015
92.5
The atomic mass is therefore
(0.075 x 6.015) + (0.925 x 7.016) = 6.94 amu
Notice that the atomic mass is closer to 7 than it is to 6. That is
because the heavier isotope is more abundant.
7.016
alt
F1
Q
A
control option
Z
4,952
-0
@2
F2
W
S
130
JUL
#3
X
80
H
command
F3
E
D
DOD
DOD
54
$
▼
C
The mass of 69 Ga is 68.7200 amu. The mass of 7¹ Ga is 70.9200 amu
Express your answer to two decimal places, and include the appropriate units.
View Available Hint(s)
F4
70
R
Review I Constants I Periodic Table
On a mission to a newly discovered planet, an astronaut finds gallium abundances of 60.11 % for 69 Ga and 39.89 % for 71Ga. What is the atomic mass of
gallium for this location?
0
Submit
Part B
Value
28 Si
The astronaut then measures the abundance of silicon on the new planet, obtaining the following results:
Abundance Mass
Isotope (%) (amu)
73.71
27.98
29 Si
30 Si
F
Help
μA
%
5
14.93
11.36
9
V
What is the atomic mass of silicon for this planet?
Express your answer to two decimal places, and include the appropriate units.
F5
28.98
T
29.97
Units
G
<6
MacBook Air
B
F6
Y
&
?
18
7
H
F7
tv
N
*00
8
F8
U
UD
J
(
9
M
K
O
F9
O
H
1
0
L
F10
P
command
W
X
F11
Iemand
[
alt
+ 11
option
<
1
Mon Jul 11 5:2-
S Paused
F12
17 of 32
]
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