Express unified atomic mass unit in kg.

Explanation

One atomic mass unit is the `1/12` of the mass of a `._(6)C^(12)` atom.
Mass of one mole of `._(6)C^(12)`atom =12g
Number of atoms in one mole = Avogadro's number
`6.023xx10^(23)`
`therefore"Mass of one "_(6)C^(12) "atom"=12/(6.023xx10^(23))g`
`1" amu"=1/12xx"mass of one "_(6)C^(12)"atom"`
`therefore1" amu"=(1/12xx12/(6.023xx10^(23)))g=1.67xx10^(-24)g`
`=1.67xx10^(-27)kg" "(therefore 1 g =10^(-3)kg)`