Percentage composition exercise
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The document contains 6 chemistry problems asking for empirical and molecular formulas of compounds given their percentage compositions or products of combustion. Problem 1 asks for the empirical formula of a compound containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen. Problem 2 asks for the molecular formula if the molar mass is 110 g/mol. Problem 3 asks for the empirical formula of a compound containing 18.7% lithium, 16.3% carbon, and 65.0% oxygen. Problem 4 asks for the molecular formula if the molar mass is 73.8 g/mol. Problems 5 and 6 similarly ask for the empirical and molecular formulas of acetic acid and aniline given combustion products and m
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Experiment 3 percent composition in plants
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MENTAL HEALTH MUST BE BROADLY DEFINED IN TERMS THAT ARE CULTURALLY SENSITIVE AND INCLUSIVE.
THE CRITERIA FOR MENTAL HEALTH MUST BE EMPIRICALLY AND LONGITUDINALLY VALIDATED.
VALIDATION MEANS PAYING SPECIAL ATTENTION TO CROSS-CULTURAL STUDIES.
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1. Joseph Proust, a French scientist, discovered the Law of Constant Proportions through experiments on chemical reactions forming compounds. He found that the mass ratios of elements in a compound are always fixed, regardless of preparation method.
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