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CHEM 2: Standard Quiz 1
Name:________________________________________ Section #:_________________ Points: _____ / 25
Please read each question carefully. Show your work, and partial credit will be awarded where possible. Report all
answers with the correct number of significant figures.
Section 1: Prerequisite Mathematical Skills
1.
-6
2.
Simplify the following exponential expression:
A. 1
B.
C.
D.
E.
3.
Find the value of x in the following equation:
A. 1
B. -1
C. -3/5
D. -6/5
E. Cannot solve the equation from the information provided.
4.
Calculate the area of a circle with a radius of 10 cm. Recall that Area = π·r , where π = 3.14…
2
2
2
2
2
A. 314 cm
B. 3140 cm
C. 31400 cm
D. 314000 cm
E. 3140000 cm
3
2
Section 2: Numbers in Chemistry
5.
How many significant figures are in each number below?
A. 1.007 ________________________
B. 0.0017 ________________________
C.
6.
-3
Using the rules for manipulating significant figures in addition, add the following numbers: (3.000 x 10 ) + (2.000 x 10 ) =
-9
A. 5.000 x 10
-3
B. 5.000 x 10
-6
C. 3.002 x 10
-3
D. 2.003 x 10
-9
E. 2.003 x 10
1.700 _________________________
Following the rules for manipulating significant figures in calculations, write the answers to each calculation below:
A. (531) x (1.9) =
B. 45.8 + 0.95 =
CHEM 2: Standard Quiz 1
7.
Convert each of the numbers below into PROPER scientific notation:
A. 0.000410 = __________________________________
B. 958,000,000 = _______________________________
8.
Convert each of the numbers below into STANDARD NOTATION:
A. 0.0591 x 10-4 = ________________________________
B. 1.95 x 109 = ____________________________________
9.
With the information provided, perform the unit conversions below. WRITE THE ANSWERS IN PROPER SCIENTIFIC
NOTATION. Be sure to write the proper number of significant figures in the final answer.
A. 3.5 x 10-4 m →
___________________________ µm
Prefix Definition:
B. 13.0 feet →
Given:
C. 0.015 ms →
“micro” = µ and stands for 10-6
___________________________ cm
1 ft = 12 inches
1 inch = 2.54 cm
___________________________ ns
Prefix Definitions:
“milli” = m = 10-3
“nano” = n = 10-9
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