MHT CET202123 Sep 2021Evening ShiftChemistrySolid StateActual
An element with BCC structure has edge length of 500 pm . If its density is 4 ~g ~cm ^3 , find atomic mass of the element?
Options
- A150 ~g ~mol ⁻¹
- B100 ~g ~mol ⁻¹
- C125 ~g ~mol ⁻¹
- D250 ~g ~mol ⁻¹
Correct answer
A. 150 ~g ~mol ⁻¹
Step-by-step solution
aligned & a =500 pm =500 10⁻¹⁰ ~cm & =5 10⁻⁸ ~cm & Z =2( for BCC ) & d = ZM N _ A a ^3 & M = d N _ A a ^3 Z = 4 6.022 10²³ (5 10⁻⁸ )^3 2 & M =150 ~g ~mol ⁻¹ aligned