CHM 2045C Module Five Sample Exam

Module Five:Chemical Equations & Stoichiometry (Chap 2, 3 & 4)

A._____(03) Molecular Mass Calculation-Section 2.5, 3.5 Answers a

B._____(04) Mole Calculations-Section 2.5 Answers bcd

C._____(03) Percentage Composition Calculation-Section 3.6 Answers bcd

D._____(04) Empirical Formula Calc. from % Comp & Analysis-Section 4.6 Answers bcd

E._____(04) Basic Stoichiometric Definitions-Chapter 4 p139 Answers ef

F._____(05) Balancing Chemical Equations by Inspection-Section 4.2 Answers ef

G._____(04) Predicting Single Replacement Products . Section Answers g

H._____(04) Predict Double Replacement & Organic Combustion Products 5.2, 5.4 Answers h

I.______(04) Mole-Mole Problems Lecture Answers ij

J._____( 04) Mass-Mass Stoichiometric Problems-Section 4.3 Answers ij

K._____(04) Excess/Limiting Reagent Problems-Section 4.4 Answers kl

L._____(04) Impure reagents/% Yield Problem-Section 4.5 Answers kl

N._____(04) Multi step Synthesis Problems-Section 4.6 Answers

O._____(04) Mixture Problem Answers 2^nd Example Combined Example

M._____(10) Multiple Choice 5^th Chapter 4 multiple choice#1 Chap 4 Multiple Choice #2

______(65) Total = ______%

Module Five-Part A: Molecular Mass Calculation 3 points

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

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

3. Calculate the molecular mass of glucose, C₆H₁₂O₆.