Question

What equivalence factor set should you use to convert from `4.23 x 10^12` atoms of calcium (Ca) to grams of Ca?

Answer 1

`N_A` `", Avogadro's number"`. `N_A=6.022xx10^23`.

Explanation:

By definition, `N_A,` `6.022xx10^23" calcium atoms"` have a mass of `40.08*g`.

And thus,

`(4.23xx10^12" calcium atoms")/(6.022xx10^23" calcium atoms mol"^-1)xx40.08*g*mol^-1`

`=` `??g`