When is the percent composition being used? The simplest ratios and form of a chemical formula is called? Give the 4 types of chemical reactions.

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General Chemistry Week 9 Percent Composition  The percent composition is useful when you are trying to determine the formula of a compound from chemical analysis data.  Chemical analysis data tells us how much of each element is present in the sample as a percentage.  Empirical Formula simplest ratios and form of a chemical formula Balancing Chemical Equations •Chemical equations show: The substances that react, called reactants The substances that form, called products The relative amounts of the substances involved  numbers before a formula (coefficients) indicate the relative amount of that molecule in the reaction