How many oxygen atoms are there in a $32*g$ mass of oxygen gas?

Question

8032 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-11-23T19:58:43

There are $2xxN_A$ oxygen atoms in a $32*g$ mass of dioxygen.

And $N_A$ $=$ $"Avogadro's number"$ $=$ $6.022xx10^23*mol^-1$

Note that $N_A$ oxygen atoms have a mass of $16.0*g$ .

But $N_A$ oxygen MOLECULES, i.e. dioxygen, have a mass of $32.0*g$ .

How many oxygen atoms are there in a 32*g32*g mass of oxygen gas?