Question

The mass of an atom of oxygen is $16.0\mathrm{u}$ express in Kg.

Answer 1

Step 1: Relationship between Atomic Mass unit(u)and kg

• $1\text{u}=1.66\times {10}^{-27}\text{kg}$

Step 2: Conversion of mass from u to kg

• $$\begin{gathered} \text{Mass of an atom of oxygen(kg})=16\text{u×}\frac{{\text{1.66×10}}^{-27}\text{kg}}{1\text{u}} \\ \text{=26.56}{\times 10}^{-27}\text{kg} \end{gathered}$$

Hence, the mass of an atom of oxygen is $26.56\times {10}^{-27}\mathrm{kg}$.