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Unformatted text preview: gas. The mole is a measure of the number of molecules in a sample, and it is defined as " the amount of any substance that contains as many atoms/molecules as there are atoms in a 12-g sample of 12 C " Laboratory experiments show that the number of atoms in a 12-g sample of 12 C is equal to 6.02 x 10 23 mol-1 . This number is called the Avogadro constant , N A . The number of moles in a sample, n, can be determined easily:...
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This document was uploaded on 11/25/2011.
- Fall '09