The Student Room Group

Chemistry

One isotope of sodium has a relative mass of 23.
Calculate the mass, in grams, of a single atom of this isotope of sodium.
Mass of atom ...................................
I might be wrong BUT,

1 mole of a substance has 6.02 x 10^ atoms

And I think the mass of one mole of a substance is equal to the Mr of the compound/element. So in this case 23g
So if 1 mole is 23 g, and you want to find the mass of a single atom,
23/(6.02x10^23) gives the mass of 1 atom.

But again, I might be wrong. I'm hoping someone might be able to confirm or correct this because I'm interested to know too!

Quick Reply