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Lecture_07_012512

# Lecture_07_012512 - Lecture 7 Chemical Equations •...

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Unformatted text preview: Lecture 7: Chemical Equations • Outline (Chapter 3.4-3.7): − Percent Composition of Compounds (3.4) − Determining the Formula of a Compound (3.5) − Chemical Equations (3.6) − Balancing Chemical Equations (3.7) • Problems for Extra Practice: 3.37, 3.39, 3.41, 3.43, 3.45, 3.47, 3.49, 3.51, 3.53, 3.56 Concept Review Calculate the percent composition of sucrose, C 12 H 22 O 11 Concept Review How many grams of carbon are in 24.35 g of sucrose? Empirical and Molecular Formulas Empirical Formula- The simplest formula for a compound that agrees with the elemental analysis. The smallest set of whole numbers of atoms. Molecular Formula- The formula of the compound as it really exists. It must be a multiple of the empirical formula . CH 3 CH 2 OH CH 3 OCH 3 Condensed structural formula Elemental Analysis Figure 3.5: Schematic Diagram of a Combustion Analysis Device Decomposition or combustion analysis is used to determine the mass of each type of element present in a compound. the mass of each type of element present in a compound....
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Lecture_07_012512 - Lecture 7 Chemical Equations •...

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