Express (a) the energy required to break one bond in DNA `(10^(-10)J)` in eV.
(b) the kinetic energy of an air molecule `(10^(-21)J)` in eV.
(c) the daily intake of a human adult `(10^(7)J)` in kilocalories.

Explanation

(a) Energy require to break one bond in DNA is
`=10^(-20)J=(10^(-20))/(1.6xx10^(-19))eV=0.06eV`
(b) K.E. of an air molecule is
`=10^(-21)J=(10^(-21))/(1.6xx10^(-19))eV=0.0062eV`
(c) The daily intake of a human adult
`=10^(-21)J=(10^(7))/(4.2xx10^(3))Kcal=2400Kcal`