08 Empirical and Molecular Formulas

08 Empirical and Molecular Formulas - Question from Last...

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1 1 Question from Last Time: Name this Alkane! A) 3,6,7-trimethyldecane B) 6-ethyl-3,7-dimethylnonane C) 4-ethyl-3,7-dimethylnonane D) 2,5-diethyl-6-methyloctane E) Some other name. In deciding on the order of the names of side chains, ignore the numerical prefixes (di, tri, tetra, etc). Go alphabetically by side chain name. 2 9 carbon chain It’s a nonane 2 methyl groups and 1 ethyl group 4-ethyl-3,7-dimethylnonane not 6-ethyl-3,7-dimethylnonane Answer Keep the sum of the numbers as small as possible! Ethyl comes before dimethyl because e comes before m. Numerical prefixes (di, tri, tetra, etc) are ignored.
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2 3 Question from Reading 3.10 – 3.11 Which statement below is not correct? A) An empirical formula specifies the simplest possible ratio of atoms in a molecule in terms of integers (whole numbers). B) An empirical formula is a molecular formula that was determined experimentally. C) A molecular formula is an integer multiple of an empirical formula. 4 OWL homework vs LUCID quizzes OWL 83% correct LUCID 62% correct Conclusions? Students can find the correct answer by following the tutorial. Students fail to repeat the problem without using the tutorial. Students then are unable to solve a similar problem when a tutorial is not provided.
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3 5 C 2 H 2 C 4 H 4 C 6 H 6 C 8 H 8 C 10 H 10 The empirical formula of a compound has the
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This note was uploaded on 10/16/2009 for the course CHE 129/130 taught by Professor Hanson during the Fall '09 term at SUNY Stony Brook.

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08 Empirical and Molecular Formulas - Question from Last...

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