Question

Does anyone know the mass (grams) of Uranium, Sodium (Na) and Lithium?

Answer 1

the molar mass of every atom is found on every square of the periodic table

Answer 2

Thank but, there is a question that has two different answers, there's a section that says Mass (grams), and the other says Molar Mass (g/mole) which got me thinking that the two are different.

Answer 3

they might be, it depends on what the question is really asking. is it asking for the mass of a single atom? or the average mass of all the isotopes?

Answer 4

I have a feeling it's asking for the average mass.

Answer 5

then the average mass and the molar mass are really the same thing

Answer 6

in either case, i'd look up that mass on the PT

Answer 7

Oh. I had thought that if it was the same thing, it would be easier, but then I would have divide the two for Moles of Each Element section, and it wouldn't make sense because they would all end up in 1 mole.

Answer 8

Right. If you were asked for the mass of 2 moles of sodium, you'd take the molar mass and double it.
if you were asked for the mass of 1/5 of a mole of sodium, you'd take the molar mass and divide by 5

molar mass is a ratio, above all else.

Answer 9

Oh, okay thanks I get it now. (: