if energy absorbed by each molecule of x2 is 3.5×10^-19j and BE per atom is 180.6kj then kE per molecule?
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K.E per atom=
energy absorbed-bond energy
________________________
no.of atoms in the molecule
As it is not mentioned in the question, assume the molecule is diatomic
Thus,
K.E per atom =4.4 x 10^−19 − 4 x 10−19 /2 = 0.4 x 10^−19/ 2= 2 x 10^−20 j
Hence correct option is (2)
It should be noted that the denominator will be the no. of atoms in the molecule.
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