Mole Definition

A mole is a unit of mass.
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Mole Definition: a chemical mass unit, defined to be 6.022 x 1023molecules, atoms, or some other unit. The mass of a mole is the gram formula mass of a substance.

Examples: 1 mole of NH3 has 6.022 x 1023molecules and weighs about 17 grams. 1 mole of copper has 6.022 x 1023atoms and weighs about 63.54 grams.

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Helmenstine, Anne Marie, Ph.D. "Mole Definition." ThoughtCo, Feb. 7, 2017, Helmenstine, Anne Marie, Ph.D. (2017, February 7). Mole Definition. Retrieved from Helmenstine, Anne Marie, Ph.D. "Mole Definition." ThoughtCo. (accessed April 24, 2018).