Chem 116 Exam 1 08 - Test 31 Name Section TA Chemistry...

Test 31
Name _________________________ Chemistry 116-C
Section ____________ EXAM I Total Points = 150
TA ___________________________ Tuesday, 7:00 PM
February 5, 2008
THIS EXAM IS FOR STUDENTS WITH MONDAY-WEDNESDAY 11:30
LECTURE. YOU SHOULD HAVE AN ORANGE COMPUTER ANSWER SHEET!
Directions:
1. Each student is responsible for following directions. Read this page carefully.
2. Write your name and other requested information on this page and on the separate answer
sheet.
3. CODE your name on the answer sheet using an ordinary (#2) pencil.
4. CODE your correct 10-digit identification number (PUID) on the answer sheet. THIS IS
VERY IMPORTANT!
5. CODE your lab section number on the answer sheet. Please use all four digits, 0101, 0201,
0301, etc. This is also very important!
6. CODE the test number shown in the upper right-hand corner on to the answer sheet in the
block labeled “Test/Quiz Number”. This is Test 31.
7. Put all calculations on the examination pages. DO NOT PUT ANY EXTRA MARKS ON
THE COMPUTER ANSWER SHEET!
8. This exam consists of 20 multiple-choice questions worth 7.5 points each and 1 extra credit
question worth 3 points. Choose the one best or correct answer for each question and write
it both on your exam paper and on the computer answer sheet. The computer answer sheet
is the only one that will be graded!
9. This exam consists of 8 pages plus a, Useful Information page, a Periodic Table and 2 sheets
of scratch paper. Please check to be sure that you have them all!
KEEP YOUR ANSWERS AND WORK COVERED TO PROTECT
THE INTEGRITY OF YOUR WORK!!

116-C − Exam 1 (Test 31) − 02/05/08
_____ 1. Balance the following combustion reaction and answer the question below.
____C
4
H
10
(g) + ____O
2
(g) → ____CO
2
(g) + ____H
2
O(g)
The complete combustion of 0.40 moles of butane gas, C
4
H
10
, will:
(a) consume 0.40 mol O
2
and produce 0.20 mol CO
2
.
(b) consume 0.80 mol O
2
and produce 0.40 mol CO
2
.
(c) consume 1.3 mol O
2
and produce 0.80 mol CO
2
.
(d) consume 2.6 mol O
2
and produce 1.6 mol CO
2
.
(e) consume 5.2 mol O
2
and produce 3.2 mol CO
2
.
_____ 2. What mass of carbon reacts completely with 17.8 grams of SiO
2
according to the following
equation?
SiO
2
(s) + 3 C(s) → SiC(s) + 2 CO(g)
(a) 1.19 g
(b) 3.56 g
(c) 7.12 g
(d) 10.7 g
(e) 53.4 g
_____ 3. How many moles of potassium bromide can be produced from the reaction of 2.92 moles of
potassium with 1.78 moles of bromine gas?