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KCET2019ChemistrySolid State

The number of atoms in ( 2.4 ~g ) of body centred cubic crystal with edge length ( 200 pm ) is (density ( =10 ~g ~cm ⁻³, NA =6 10²³ ) atoms ( / mol ) )

Options

  1. A( 6 10²³ )
  2. B( 6 10¹⁹ )
  3. C( 6 10²² )
  4. D( 6 10²⁰ )

Correct answer

C. ( 6 10²² )

Step-by-step solution

d= Z M a³ N_ A M= d a³ N_ A Z = 10 (200)³ 10⁻³⁰ 6 10²³ 2 =2424 ~g contains 6 10²³2.4 ~g contains? 6 10²²

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