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The first ionisation energy of a certain...

The first ionisation energy of a certain atom took plaec with an absorption of radiation of frequency `1.5xx10^(18)` cycle per second calculate its ionisation energy in calorie per gram atom.

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Verified by Experts

The correct Answer is:
`1.43xx10^(8)cal`
1 calorie`=4.18xx10^(7)erg`
Apply `E=hhxxvxx"Avogardro's number"`
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