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Question

What is the mass of one Curie ofU234

A
3.7×1010gm
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B
2.348×1023gm
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C
1.44×1011gm
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D
6.25×1034gm
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Solution

The correct option is C 1.44×1011gm

1 curie = 3.71×1010 disintegration/sec and mass of 6.02×1023 atoms of U234=234gm
Mass of 3.71×1010 atoms =234×3.71×10106.02×1023=1.44×1011gm

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