Question

If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the mass of one atom of oxygen.

Answer 1

One mole of oxygen atoms would weigh 16 g because an oxygen atom weighs 16 u.

Mass of 1 mole of oxygen atom is, 16 g/mol

Number of particles in 1 mole, $N_A=6.023\times {10}^{23}mo{l}^{-1}$

Mass of one oxygen atom = $\frac{w}{N_A}=\frac{16}{6.023\times {10}^{23}}$

Mass of one oxygen atom = $2.657\times {10}^{-23}$g/atom