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22 August, 08:35

How many gram-atoms are in 120-gram sample of calcium metal? How many atoms is this?

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  1. 22 August, 09:48
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    (sample g/1) X (1 mole/40.078 (MW of Ca)) = moles of sample (moles of sample) (6.022 x 10^23 (no of atoms) / 1 mole) = # of atoms in a 120 g sample of calcium Avogadro's number=6.022x 10^23 atoms in 1 mole
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