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  • 31-01-2017
  • Chemistry
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How many gold atoms are contained in 0.650 grams of gold?

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Аноним Аноним
  • 06-02-2017
Moles of gold = mass of gold/atomic weight of gold
                       =   0.65/196.967 
                       =    3.3 x 10^-3 

Number of gold atoms = moles x 6.02 x 10^23 
                                    = 1.98 x 10^21 atoms

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