NEET2008ChemistrySolid StateActual
A unit cell of sodium chloride has four formula units. The edge length of the unit cell is (0.564 ~nm ). What is the density of sodium chloride?
Options
- A(1.2 ~g / cm ^3 )
- B(2.165 ~g / cm ^3 )
- C(3.64 ~g / cm ^3 )
- D(4.56 ~g / cm ^3 )
Correct answer
B. (2.165 ~g / cm ^3 )
Step-by-step solution
aligned & Density = n M N_A a^3 & = 4 58.5 6.023 10²³ (5.64 10⁻⁸ )^3 =2.17 ~g / cm ^3 aligned begin aligned & : Density = n M N_A a^3 & = 4 58.5 6.023 10²³ (5.64 10⁻⁸ )^3 =2.17 ~g / cm ^3 aligned