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18 March, 14:22

If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 g/mol, how many sodium atoms are there in the sample?

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  1. 18 March, 14:24
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    8.2 grams X (1 mol/23 grams) X 6.02 X 10^23 atoms/mole = 2.15 X 10^23 atoms
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