Question

If $16g$ of $O$ contains $1mole$ oxygen atom. Calculate the mass of $1$ atom of oxygen.

Answer 1

$1$ mole of oxygen contains $6.022\times {10}^{23}$ atoms of oxygen

$\therefore$ Mass of $1$ atom of oxygen= $\frac{Massof1mole}{6.022\times {10}^{23}}g$

=$\frac{16g}{6.022\times {10}^{23}}$

$\therefore$ Mass of $1$ atom of oxygen= $2.66\times {10}^{-23}g$