'2 mol al' diaporamas de présentation

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Chapter 10

Chapter 10. Energy Changes in Chemical Reactions. 1. Energy Changes in Chemical Rxns. Most reactions give off or absorb energy Energy is the capacity to do work or supply heat. Heat : transfer of thermal (kinetic) energy between two systems at different temperatures (from hot to cold).

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Stoichiometry

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Chapter 12 - Stoichiometry

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Chapter 8 Quantities In Chemical Reactions

Chemistry 100. Chapter 8 Quantities In Chemical Reactions. Mole. Mole: formula weight of a substance (in gram). 12g of C = 1 mol C. 23g of Na = 1 mol Na. 58.5 g of NaCl = 1 mol NaCl 18 g of H 2 O = 1 mol of H 2 O. Molar mass (g/mol): mass of 1 mole of substance (in gram)

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Chapter 9 Chemical Quantities

Chemistry 101. Chapter 9 Chemical Quantities. Formula Weight of NaCl: 23 amu Na + 35.5 amu Cl = 58.5 amu NaCl. Molecular Weight of H 2 O: 2 (1 amu H) + 16 amu O = 18 amu H 2 O. Formula and Molecule. Ionic & covalent compounds ? Formula formula of NaCl

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The Arithmetic of Chemistry

The Arithmetic of Chemistry. Stoichiometry and chemical reactions. 3 ways of representing the reaction of H 2 with O 2 to form H 2 O. reactants. products. A process in which one or more substances is changed into one or more new substances is a chemical reaction.

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Limiting Reagents

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Chapter 11: Stoichiometry

Chapter 11: Stoichiometry. Section 11.1: Defining Stoichiometry. Objectives:. Identify the quantitative relationships in a balanced chemical equation Determine the mole ratios from a balanced chemical equation. What is stoichiometry?.

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Quantitative Composition of Compounds

5 pancakes 2 eggs. Practice using the following mouth-washing, diet-buster recipe:. 5 pancakes 2 eggs. x. =. 20 pancakes. 8 eggs. 3 blocks cream cheese + 5 eggs + 1 cup sugar = 1 cheese cake. How many cheese cakes can we make out of 15 eggs?. 1 cake 5 eggs. 15 eggs x.

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STIOCHIOMETRY CHEMISTRY CHAPTER 9 9 .1 What is Stiochiometry

STIOCHIOMETRY CHEMISTRY CHAPTER 9 9 .1 What is Stiochiometry ?A. The study of quantitative relationships between amounts of reactants used and product formed by chemical reactions. ? B. Mole-Mass relationships in chemical reactions

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Warm Up:

Warm Up:. Balance the below equation and answer the multiple choice question. ___H 2 + ___O 2 ? ___H 2 O. 2 1 2. Limiting Reagent. Limiting Reagent (Reactant).

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Stoichiometry

Stoichiometry. Baking Chocolate Chip Cookies!!. 1 cup butter 1/2 cup white sugar 1 cup packed brown sugar 1 teaspoon vanilla extract 2 eggs 2 1/2 cups all-purpose flour 1 teaspoon baking soda 1 teaspoon salt 2 cups semisweet chocolate chips Makes 3 dozen.

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Stoichiometry

Stoichiometry. Mole-Mass Mass-Mass. Mass-Mole Problems. Step 1 : Write a BALANCED EQUATION Step 2 : Determine your known & unknowns Step 3 : Convert known mass to moles (molar mass-known) Step 4 : Convert known mole to unknown mole (Mole-Mole ratio). Mass-Mole Problems. Example:.

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Stoich!

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HW Answers

HW Answers. 10.18 & 19. Assignment. Read pp. 306-307, practice problems #1-4 on p. 307; problems p. 334 #1 & 3. p. 307 #1. Fe 2 O 3 + 2Al ? 2Fe + Al 2 O 3 How many grams of Al are needed to completely react with 135 g Fe 2 O 3 ? Conversion: 135 g Fe 2 O 3 to grams of Al.

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Combustion analysis

Combustion analysis. 1 mol CO2 44 g CO2. 1 mol C atoms 1 mol CO2. = 0.10 mol C atom. 4.40 g CO2. 1 mol H2O 18 g H2O. 2 mol H atoms 1 mol H2O. = 0.20 mol H atom. 1.80 g H2O. 3.00g = weight O + weight C + weight H. weight O = 3.00g - weight C weight H.

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Combustion analysis

Combustion analysis. 1 mol CO2 44 g CO2. 1 mol C atoms 1 mol CO2. = 0.10 mol C atom. 4.40 g CO2. 1 mol H2O 18 g H2O. 2 mol H atoms 1 mol H2O. = 0.20 mol H atom. 1.80 g H2O. 3.00g = weight O + weight C + weight H. weight O = 3.00g - weight C weight H.

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