How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g?

  1. A

    1.71 X 1021

  2. B

    2.57 X 1021

  3. C

    5.14 X 1021

  4. D

    1.28 X 1021

    Join Our Infinity Learn's Learning Program!

    FREE Lve Classes, PDFs, Solved Questions, PYQ's, Mock Tests, Practice Tests, and Test Series!

    +91

    Verify OTP Code (required)


    I agree to the terms and conditions and privacy policy.

    Solution:

    The are four molecules of NaCl per unit cell. Hence, the mass of one unit cell is

       m=4(23+35.5)g/6.022×1023

    The number of unit cell in 1.00 g of crystal will be

    N=6.022×10234×(23+35.5)=2.57×1021

    Chat on WhatsApp

      Join Infinity Learn Regular Class Program!

      Sign up & Get instant access to FREE PDF's, solved questions, Previous Year Papers, Quizzes and Puzzles!

      +91

      Verify OTP Code (required)





      I agree to the terms and conditions and privacy policy.