Question

Number of unit cells in 10 gm NaCl

Answer 1

Hey dear,

● Answer -

10 gm of NaCl contains 2.57×10^22 unit cells

● Explanation -

NaCl crystallizes in CCP lattice with Z = 4.

Number of molecules are calculated by -

N = No.W / Z.M

N = (6.022×10^23 × 10) / (4 × 58.5)

N = 2.57×10^22 molecules

Hence, 10 gm of NaCl contains 2.57×10^22 unit cells.

Hope this helps you.

Keep asking..

Answer 2

Answer:

HI,

we all know the equation

d= Z * M/a3 * Na

Now,

the twist....are you ready

d* a3 = Z * M/Na

what is d * a3 ….well....IT IS THE MASS OF 1 UNIT CELL

SO,

now...

we know NaCl has a mass of 35.5g

and Z=4

so,

mass of 1 unit cell= 4*35.5/Na

= 142/Na

Number of unit cells = 10g* Na/142

finally you will get an answer of approx

4.2 * 1022 unit cells

CHEERS!!

GREAT QUESTION

VV IMP

BEST OF LUCK!!