Express unified atomic mass unit in kg.

 

Answers (1)

We know that the unified atomic mass unit or amu or u= \frac{1}{12} the mass of one c^{12}  atom

Mass of 6.023\times10^{23} carbon atoms (_{6}C^{12})= 12\; gm

Thus, the mass of one _{6}C^{12} atom = \frac{12}{6.023}\times 10^{-23}gm

Now , 1 amu

= \frac{1}{12}\times \frac{12}{6.023}\times 10^{-23}\; gm

=1.66\times 10^{-24}\; gm

   Thus, 1 amu = 1.66\times10^{-27}kg

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