MHT CET202313 May 2023Evening ShiftChemistrySolid StateActual
Calculate the volume of unit cell if an element having molar mass 180 ~g ~mol ⁻¹ forms fcc unit cell. [ N _ A =120 10²¹ ~g ~cm ⁻³ ~mol ⁻¹ ]
Options
- A6.00 10⁻²¹ ~cm ^3
- B5.00 10⁻²¹ ~cm ^3
- C4.00 10⁻²¹ ~cm ^3
- D7.00 10⁻²¹ ~cm ^3
Correct answer
A. 6.00 10⁻²¹ ~cm ^3
Step-by-step solution
Volume of unit cell = a ^3= ? Density ( )= M n a^3 N_A a ^3= M n N _ A = 180 4 120 10²¹ =6.00 10⁻²¹ ~cm ^3