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* 1 mole of any element is equal to its atomic weight (on the Periodic Table) in grams.
Equivalencies/Known:
1 mole C = 12.0107g C*
1 mole C = 6.022 x 1023 atoms C
1000mg = 1g
Given:
55mg C
1. Convert 55mg C to grams C.
55mg C x (1g C/1000mg C) = 0.055g C
2. Convert 0.055g C to moles C.
0.055g C x (1mol C/12.0107g C) = 0.0046mol C
3. Convert 0.0046mol C to atoms C.
0.0046mol C x (6.022 x 1023atoms C/1mol C) = 2.8 x 1021atoms C
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