2007 U. S. NATIONAL CHEMISTRY OLYMPIAD LOCAL SECTION EXAM Prepared by the American Chemical Society Olympiad Examinations Task Force OLYMPIAD EXAMINATIONS TASK FORCE Arden…

CHAPTER 4 REACTIONS IN AQUEOUS SOLUTIONS 4.7 (a) is a strong electrolyte. The compound dissociates completely into ions in solution. (b) is a nonelectrolyte. The compound…

INORGANIC PAPER Q.1 Reactions of aluminium with 1. O2 3. Cl 2 5. Mn 3O4 7. H2SO4(Dil.) 9. HNO 3 CHEMISTRY P. JOY 2. N 2 4. Cr 2O3 6. HCl 8. H 2SO4 (Conc.) 10. NaOH 11. AlCl3…

CHAPTER 3 STOICHIOMETRY 3.5 3.6 (34.968 amu)(0.7553) + (36.956 amu)(0.2447) = 35.45 amu Strategy: Each isotope contributes to the average atomic mass based on its relative…

PAGE# 18 MOLECONCEPT ATOMS Allthematterismadeupofatoms. Anatomisthe smallest particle of an element that can take part in a chemicalreaction.Atomsofmostoftheelements are…

CHAPTER 17 Chemical Equilibrium 1 Chapter Goals       Basic Concepts The Equilibrium Constant Variation of Kc with the Form of the Balanced Equation The…

Chemistry 111 General Chemistry Dr. Rabih O. Al-Kaysi Ext: 47247 Email: [email protected] Lecture 4 Aqueous Reactions and Solution Stoichiometry  1 - Solution Composition…

1. Chemical Reactions 2. All chemical reactions… have two parts: Reactants= the substances you start with Products= the substances you end up with The reactants will turn…

1. Chapter 8:Balancing ChemicalReactions 2. Objectives by the end of this chapter, you should be able to: Write equations describing chemicalreactions using appropriate…

1. g of O = g of sample – (g of C + g of H) Combust 11.5 g ethanol Collect 22.0 g CO 2and 13.5 g H 2 O 6.0 g C = 0.5 mol C 1.5 g H = 1.5 mol H 4.0 g O = 0.25 mol O Empirical…