Transcription of Chapter 11: Stoichiometry
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Chapter 11: Stoichiometry
366 Stoichiometry BIGIdea Mass relationships in chemical reactions confirm the law of conservation of Defining StoichiometryMAINIdea The amount of each reactant present at the start of a chemical reaction determines how much product can Stoichiometric CalculationsMAINIdea The solution to every stoichiometric problem requires a balanced chemical Limiting Reactants MAINIdea A chemical reaction stops when one of the reactants is used Percent Yield MAINIdea Percent yield is a measure of the efficiency of a chemical Green plants make their own food through photosynthesis. Photosynthesis occurs within structures called chloroplasts in the cells of plants. The balanced chemical equation for the photosynthesis is:6C O 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2 On a summer day, one acre of corn produces enough oxygen (a product of photosynthesis) to meet the respiratory needs of 130 dioxide and waterChloroplast CLIVE SCHAUPMEYER/AGSTOCKUSA/SCIENCE PHOTO LIBRAR
Stoichiometry is the tool for answering these questions. Stoichiometry The study of quantitative relationships between the amounts of reactants used and amounts of products formed by a chemi-cal reaction is called stoichiometry. Stoichiometry is based on the law of conservation of mass. Recall from Chapter 3 that the law states that
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