04-stoichiometry - 1 Week 2 CHEM 1310 Sections L and M 1 Wed | Chapter 3 Stoichiometry – Focus on Sections 3.2 3.9 – Chemical Formulas –

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Unformatted text preview: 1 Week 2 CHEM 1310 - Sections L and M 1 Wed | Aug 29, 2007 Chapter 3: Stoichiometry – Focus on Sections 3.2 - 3.9 – Chemical Formulas – Moles and Related Calculations Bring PRS units on Friday, Aug 31 WebAssign HW due Thurs before midnight Week 2 CHEM 1310 - Sections L and M 2 Mole Avogadro’s Number, N The number of atoms in exactly 12 grams of 12 C. 6.022 x 10 23 entities x mol-1 Mole (mol) The amount of a substance containing as many elementary particles as there are in 12 g of 12 C . 2 Week 2 CHEM 1310 - Sections L and M 3 Counting in Chemistry 1 mole = different masses of elements Week 2 CHEM 1310 - Sections L and M 4 Molar Mass Given: Molecular Formula Find: Molecular Weight (i.e. Molar Mass) Sulfuric Acid: H 2 SO 4 Solution: (1) Multiply the atomic mass by the # of each atom type (2) Sum the resulting weights H (1.0079 g/mol) x 2 = 2.0158 g/mol S (32.065 g/mol) x 1 = 32.065 g/mol O (15.999 g/mol) x 4 = 63.996 g/mol SUM: 98.077 g/mol 2 Week 2 CHEM 1310 - Sections L and M 3 Counting in Chemistry...
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This note was uploaded on 08/23/2011 for the course CHEM 1310 taught by Professor Staff during the Spring '11 term at University of Florida.

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04-stoichiometry - 1 Week 2 CHEM 1310 Sections L and M 1 Wed | Chapter 3 Stoichiometry – Focus on Sections 3.2 3.9 – Chemical Formulas –

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