I think Au is sold in TROY ounces and 1 Troy ounce = 31.1 grams.
There are 6.02E23 Au atoms in 197 g Au (actually 196.97 and you can use that number if you wish).
So 31.1 g Au costs $1200 and contains 6.02E23 Au atoms x (31.1/197)= about 9.5E22 atoms.
atoms/dollar = 9.5E22 atoms/1200 = about 7.2E19.
So (7.2E19 atoms/$1) x $0.01 dollars = ?
If Gold sells for $1200.00 an ounce, how many atoms of gold can you buy for a penny? Please, Show work.
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