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The energy absorbed by each molecule (A2) of a substance is 4.4 x 10-19 J and bond energy per molecule is 4.0 X 10-19 J. The kinetic energy of the molecule per atom will be
2.0 x 10-20 J
2.2 x 10-19 J
2.0 x 10-19 J
4.0 x 10-20 J