CHEM 1001/CHM 1020/ Chm1025C/CHM1032C         Name:___ Answers ____

Module Five Sample Pretest

You may use a periodic chart.

Module Five Part I: Chemical Equations & Stoichiometry (Chap 8, 9, 10)

A._____(05) Molecular Mass Calculation-Section 9.3

B._____(05) Mole Calculations-Sections 9.2, 9.4

C._____(05) Percentage Composition Calculation-Section 9.7

D._____(05) Empirical Formula Calc. from % Comp-Section 9.8

E._____(05) Basic Stoichiometric Definitions-Chapter 8, 9,& 10

F._____(20) Balancing Chemical Equations by Inspection-Sections 8.2-8.3 

G._____(05) Predicting Single Replacement Products . Sections 8.7-8.8

H._____(05) Predict Double Replacement & Neutralization Reactions Sections 8.10 & 8.11

I.______(10) Mole-Mole Problems Sections 10.1-10.2

J._____ (10) Mass-Mass Stoichiometric Problems-Sections 10.3 & 10.4

M._____(10) Multiple Choice Chapters 8, 9, & 10

______(85) Total = ______%

 

Module Five-Part A: Molecular Mass Calculation (Section 9.3)      5 points

 

1. Calculate the molecular mass of Acetic Acid, HC2H3O2.

ANSWER:

 

2. Calculate the formula unit mass of Ammonium Chromate, (NH4)2CrO4 .

ANSWER

 

3. Calculate the molecular mass of glucose,  C6H12O6.

ANSWER

Sample Homework Problems p 247 #13-16