Answer:
See Below
Step-by-step explanation:
mole weight of Au ( gold) = 196.97 gm
31.1 / 196.97 = number of moles of Au
Number of moles * Avagadro's Number = number of atoms
31.1 / 196.97 * 6.022 x 10^23 = 9.508 x 10^22 atoms
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