CHEM 121 MODULE 2 EXAM|| QUESTIONS AND ANSWERS - PORTAGE LEARNING.

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 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.