CHM1025C Module 2 Pretest Homework Packet Name:_Answers__

Module Two: ChemMath and Measurement (Corwin Chapters PSS & 2)

A. _____(05) Significant Figures- Section PSS.2 Answers

B. _____(05) Round Off/Math of Significant Figures- Section PSS.2 Answers

C. _____(05) Scientific Notation Section PSS.6 Answers

D. _____(05) Metric Basic Units /Numerical Prefixes- Section 2.1Table 2.1 2.2Answers

E. _____(05) Metric System Conversion Factors- Section 2.2-2.3 Answers

F. _____(10) Unit Analysis Sections 2.3, 2.4, 2.5 Answers Pretest #2 Ans2 Online Site

G. _____(05) Temperature Conversion Section 2.9 Answers

H. _____(05) Density/Specific Gravity Calculations Section 2.6-2.7-2.8Answers

I. _____(05) Specific Heat Calculation/Ice Cube Problem Section 2.10 Answers

_______(50) Total = ______%

M _____(25) Multiple Choice (Measurement) Chapter PSS and 2 (In Blackboard)

Module Two: Homework Packet

Module Two-Part A: Significant figures 5 points

In the blank, state the number of significant figures in each of the following measurements:

__1_1. 0.05 mL

__4_2. 250.0 cm

__3_3. 456,000,000 people

__1__4. 1000 g

__4__5. 0.00006500 moles

__3__6. 0.00200 kg

__1__7. 50 seconds

__3__8. 50.0 Seconds

__4__9. 50.00 Seconds

__1__10. 0.05 Seconds

Significant Digit Animation:

http://www.lsua.info/chem1001/Chap2-3Movies/sigdigit.html

Additional Homework (not required) for your practice:

Corwin 7^th edition:

Page 25 Questions #9 -14