The mass of a single potassium atom is 6.50*10 to the negative 23 power grams. How many potassium atoms would there be in 313 milligrams of potassium?

Question

I really need to solve this so I can learn how the steps go for it.

Answer 1

Divide the given mass of the sample by the mass of a single atom.  That will be your answer.

 

(313 x 10^-3 g) / (6.50 x 10^-23 g) = ?