One molecule of a substance absorbs one quantum of energy. The energy involved when 1.5 mole of the substance absorbs red light of frequency 7.5×1014sec−1 will be

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2.99×105 J

3.23×105 J

4.48×105 J

2.99×106 J

answer is C.

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Detailed Solution

For one molecule =E= hv For 1.5 moles =E=1.5×6.023×1023× hv =1.5×6.023×1023×6.626×10−34×7.5×1014 =4.48×105J

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