Question

Samantha wants enough one dollar coins to become a billionaire. How many moles of dollar coins will she need?

Answer 1

`"1 US billion = one thousand milllion"=10^9`

Explanation:

`(10^9"dollar coins")/(6.022xx10^23*mol^-1)=1.66xx10^-15*mol`.

Good luck taking that quantity to the bank.