Percent Composition Definition

Definition: Percent composition is the percentage by mass of each element in a compound.

Examples: The percent composition of water is 20% hydrogen and 80% oxygen.

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Helmenstine, Anne Marie, Ph.D. "Percent Composition Definition." ThoughtCo, Apr. 28, 2014, thoughtco.com/definition-of-percent-composition-605490. Helmenstine, Anne Marie, Ph.D. (2014, April 28). Percent Composition Definition. Retrieved from https://www.thoughtco.com/definition-of-percent-composition-605490 Helmenstine, Anne Marie, Ph.D. "Percent Composition Definition." ThoughtCo. https://www.thoughtco.com/definition-of-percent-composition-605490 (accessed May 25, 2018).