Question

number of unit cell in 10 gram NACL

Answer 1

Each unit cell is made of 4 Na+ and 4 Cl- ​ ions.

This means, each unit cell is made of 4 formula units.

No.of moles of  NaCl(n) = mass/molecular mass of NaCl

​10/58.5=0.17 moles

1 mole = 6.022 * 1023 formula units
0.17 moles = 6.022 * 1023 * 0.17 formula units, which is equal to 1.02 * 10-8formula units.

1 unit cell has 4 formula units of NaCl.

4 formula units = 1 unit cell
1.02 * 10-8 formula units = 2.55 * 10-9 unit cells.

HOPE IT HELPS !!!

Answer 2

Answer:

Explanation:

Each unit cell is made of 4 Na+ and 4 Cl- ​ ions.

This means, each unit cell is made of 4 formula units.

No.of moles of  NaCl(n) = mass/molecular mass of NaCl

​10/58.5=0.17 moles

1 mole = 6.022 * 1023 formula units

0.17 moles = 6.022 * 1023 * 0.17 formula units, which is equal to 1.02 * 10-8formula units.

1 unit cell has 4 formula units of NaCl.

4 formula units = 1 unit cell

1.02 * 10-8 formula units = 2.55 * 10-9 unit cells.