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CHEM 121 - M2: Exam - Requires Respondus LockDown Browser + Webcam

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CHEM 121 - M2: Exam - Requires Respondus LockDown Browser + Webcam

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CHEM 121
Course
CHEM 121

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CHEM 121
M2: Exam - Requires Respondus LockDown
Browser + Webcam
 Due No due date




 Points 100




 Questions 10




 Time Limit 120 Minutes
 Requires Respondus LockDown Browser


Attempt History
Attempt Time Score

LATEST Attempt 1 120 minutes 82 out of 100
Score for this quiz: 82 out of 100
Submitted Jan 8 at 2:07am
This attempt took 120 minutes.

Question 1
pts
You may find the following resources helpful:
Scientific Calculator (Links to an external site.)
Periodic Table
Equation Table

, Show the calculation of the molecular weight for the following two
compounds, reporting your answer to 2 places after the decimal.
1. (NH4)2CO3

2. C8H6NO4Br
Your Answer:
1.
n 2 x 14.01 = 28.02
h 8 x 1.008 = 8.064
c 12.01
0 3x 16 = 48
28.02 + 8.064+ 12.01 + 48 =
(NH4)2CO3 = MW= 96.094




2.
C 8x12.01= 98.06
H 6x1.008= 6.048
N 14.01
O 4x16=64
Br 79.90
98.06+6.048+14.01+64+79.90 =
C8H6NO4Br= MW= 262.018




1. 2N + 8H + C + 3O = 96.09


2. 8C + 6H + N + 4O + Br = 260.04
reporting your answer to 2 places after the decimal.
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  • chem 121 m2 exam requires respondus lockdown
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