Question

how many atoms of potassium are there in a 5.00g sample of potassium??

Answer 1

How many moles of potassium are in 5.00g?

Answer 2

Hint: use molar mass to convert.

Answer 3

so it would be 0.1??

Answer 4

I get 0.128 moles of K.

Answer 5

Then convert to atoms using 1 mol = 6.022 x 10^23 atoms. (Avogadro's number)

Answer 6

0.8 x 10^23

Answer 7

Basically. I get 7.71 x 10^22 using sci not and sig fig.

Answer 8

okay Thank u!!:)

Answer 9

No worries. :)

Answer 10

Can u answer other one??
it on the top of open question