MHT CET202016 Oct 2020Morning ShiftChemistrySolid StateActual
A compound has fcc structure. If density of unit cell is 3 4 ~g ~cm ⁻³ , what is the edge length of unit cell? (Molar mass =98.99 )
Options
- A7 .783 A^
- B5 .783 A^
- C8 .780 A^
- D6.083 A^
Correct answer
B. 5 .783 A^
Step-by-step solution
(D) array l n =4, =3.4 ~g ~cm ⁻³, M =98.99, a =? a ³= n M N _ A = 4 98.99 3.4 6.022 10²³ a ³=193.4 10⁻²⁴ ~cm ³ a =5.783 10⁻⁸ ~cm a =5.783 Å array