Question

How many moles of `Pb` is in `9.3 * 10^15` atoms of `Pb`?

Answer 1

`9.3xx10^(15)"atoms Pb"` make up `color(blue)(1.5xx10^(-8)"mol Pb")`.

Explanation:

One mole of any element contains `6.022xx10^23"atoms"` of that element.

In order to determine how many moles are in a given number of atoms, divide the given number of atoms by `(6.022xx10^23"atoms")/(1"mol")`.

`9.3xx10^15cancel"atoms Pb"xx(1"mol Pb")/(6.022xx10^23cancel"atoms Pb")=1.5xx10^(-8)"mol Pb"`