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Q.

An explosion of atomic bomb release an energy of 7.6 × 1013J. If 200 Mev energy is released on fission of one 235U atom calculate (i) the number of uranium atoms undergoing fission, (ii) the mass of uranium used in the bomb.

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a

4.375 × 1024; 926.66g

b

2.375 × 1024; 926.66g

c

3.375 × 1024; 926.66g

d

2.375 × 1024; 826.66g

answer is D.

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Detailed Solution

n= Total energy  energy perfission =7.6×101332×10−12=2.375×1024m=A×nNA=235×2.375×10246×1023∴m=926.66gm.

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