A sample of calcium that contains one-half Avogadro's number of atoms has a mass of ________.

Name: A sample of calcium that contains one-half Avogadro's number of atoms has a mass of ________.
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One mole of calcium (Ca) has a mass of approximately 40 g and contains Avogadro's number of atoms (6.022 x 10^23 atoms). Therefore, half a mole would contain half of Avogadro's number of atoms and would have a mass of 20 g.

A Sample of Calcium That Contains One-Half Avogadro's Number of Atoms