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Question

The number of significant figures in N0=6.022×1023 i.e., Avogadro's number, is :
  1. three
  2. four
  3. twenty six
  4. twenty seven

A
twenty seven
B
twenty six
C
three
D
four
Solution
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When numbers are written in scientific notation, then the number of digits between 1 and 10 gives the number of significant figures. Thus, the number of significant figures in 6.022×1023 is 4.

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