HanahJai HanahJai

22-10-2016
Chemistry

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What is the number of atoms in a 2.35g piece of Gold (Au) ?

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Willchemistry Willchemistry

23-10-2016

Atomic mass gold ( Au) = 196.96 a.m.u

196.96 g ------------ 6.02x10²³ atoms
2.35 g -------------- ??

2.35 x (6.02x10²³) / 196.96

=> 7.18x10²¹ atoms

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