CHEM
1001/CHM1020/CHM1025C/CHM1032C
Name:___________
Module Two: ChemMath and Measurement (Corwin Chapters 2 & 3)
A. _____(03) Significant Figures- Section 2.2 Answers abc
B. _____(03) Round Off/Math of Significant Figures- Section 2.3 Answers abc
C. _____(04) Scientific Notation Section 2.6 Answers abc
D. _____(10) Metric Basic Units /Numerical Prefixes- Section 3.1 Answers de
E. _____(10) Metric System Conversion Factors- Section 3.2-3.3 Answers de
F. _____(10) Unit Analysis Sections 2.8, 2.9, 3.4 Answers fg Pretest #2 Ans2
G. _____(10) Temperature Conversion Section 3.8 Answers gh
H. _____(10) Density/Specific Gravity Calculations Section 3.7 Answers gh
M _____(10) Multiple Choice (Measurement) Chapter 2&3
_______(70) Total = ______%
Module Two:
Sample Pretest
Module
Two-Part A: Significant figures (1.7)
3 points
In the blank, state
the number of significant figures in each of the following measurements:
____1. 0.05 mL _____4. 1000 g
____2. 250.0 cm _____5. 0.00006500 moles
____3.
456,000,000 people
_____6. 0.00200 kg
Module
Two-Part B:
Rounding Off & Arithmetic Operations of Sign. Figures 3 points
Round off the
following numbers to three significant figures:
(1)
1.598 x 106= _____________ (2) 0.000 000 484 500 = _________________
Perform the following
addition/multiplication operations and express the answer using the proper
units and significant figures:
(3) 4
mL (4) 16.5 cm (5) 12.0
g ÷ 1.00 g =
16.3 mL X 1.7 cm or
+ 0.953 mL 12.0 g / 1.00 g =
Module
Two-Part C: Exponential Numbers and Scientific Notation 3 points
(1.6
& 1.&) Express the following ordinary numbers
in scientific notation (If greater than three significant figures, round off to
three significant figures:
(1) 1,010,100,000,000, 000 = ________________ (4) 0.0001198 = _____________
(2) 0.000 000 000 000 019 =
________________ (5) 1,000,000 =
______________
(3) 456,789 = _________________ (6) 0.000200
= ______________