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MHT CET20225 Aug 2022Evening ShiftChemistrySolid StateActual

Find the molar mass of an element that crystallizes forming unit cell structure having edge length 4 10⁻⁸ ~cm and containing 4 particles. ( Q=19.7 ~g ~cm ⁻³ )

Options

  1. A140.2 ~g ~mol ⁻¹
  2. B189.8 ~g ~mol ⁻¹
  3. C160.5 ~g ~mol ⁻¹
  4. D220.0 ~g ~mol ⁻¹

Correct answer

B. 189.8 ~g ~mol ⁻¹

Step-by-step solution

d = Z M V N _ A 19.7= 4 M (4 10⁻⁸ )^3 6.02 10²³ M =189.75 ~g / mol

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