Chapter Three: [PDF]

release about 1 Eg (1 x 10-6 g) of this compound when they string. The resulting scent attracts other bees to join the a

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Chapter Three: STOICHIOMETRY

Contents

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Stoichiometry - The study of quantities of materials consumed and produced in chemical reactions.

3-1 Counting by Weighing

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3-2 Atomic Masses

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Mass 13C 1.0836129 12 Mass C

Mass of

13

C (1.0836129)(12 amu) 13.003355 amu

Average atomic mass

Exact number by definition

Elements occur in nature as mixtures of isotopes Carbon = 98.89% 12C; 1.11% 13C;

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