Calculate the mass in grams of 10 atoms of the K.

Calculate the mass in grams of 10 atoms of the K.

This thing says the answer is 6.5E-22

But here is what I do:
(10*(1/39.09))/6.022*10^23

This gives 4.3E-25

Amidoinitwrong?

K = 39.09 grams per mol
1 mol = 6.022*10^23 atoms

39.09/6.022*10^23 = 6.5*10^ -23 grams per each atom

6.5*10^ -23 * 10 = 6.5*10^ -22 grams in 10 atoms

you multiplied by (1/39.09) instead of by 39.09

Yes
should be 10 x 39.09/[6.02 x 10^23]