I am trying to figure out how many atoms are in 4.2 moles of BaO. I took 4.2 moles and multiplied it by 1/109.32, resulting in .038. Is this correct? Thanks hopefully this will be the final one.

Question

I am trying to figure out how many atoms are in 4.2 moles of BaO.  I took 4.2 moles and multiplied it by 1/109.32, resulting in .038.  Is this correct? Thanks hopefully this will be the final one.

DrBob222 · Answer

No.
There are 6.02 x 10^23 molecules in 1 mole of anything. You have 4.2 moles BaO; therefore, there will be 6.02 x 10^23 x 4.2 = ?? molecules BaO. Since there are two atoms per molecule BaO, you will have twice that many atoms.
I saw your question that Bob Pursley answered. You haven't caught the concept I don't believe.

Narasaq · Answer

25.284 x 10^23 atoms?

DrBob222 · Answer

(6.02 x 10^23 molecules BaO/1 mole BaO)x (4.2 moles BaO) x (2 atoms/1 molecule) = ?? and I don't get 25 something.