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The ionization enthalpies of Li and Na a...

The ionization enthalpies of Li and Na are `"520 kJ mol"^(-1)` and `"495 kJ mol"^(-1)` respectively. They energy required to convert all the atoms present in 70 mg of Li vapours and 230 mg of sodium vapours of their respectively gaseous cations respectively are

A

`52 J, 49.5J`

B

`520 J, 495 J`

C

`49.5 J, 52J`

D

`495 J, 520 J`

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