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The energy required to break one mole of...

The energy required to break one mole of Cl - Cl bonds in `Cl_2` is `242 kJ mol^-1`. The longest wavelength of light capable of breaking a single Cl - Cl bond is_________
`(c = 3 xx 10^8 ms^-1) and (N_A = 6.02 xx 10^23 mol^-1)`

A

494 nm

B

594 nm

C

640 nm

D

700 nm

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