tX-ray diffraction studies show thatespper crystalizes in an fce unit

1.	tX-ray diffraction studies show thatespper crystalizes in an fce unit cell with cell edge of 3.608a separate experiment, copper is determinedto have a density of 8.92 g cm3. Calculate the atomic mass ofNCERT Example 1.4)1.17cm. Ins 2
Answer» In case of fcc lattice number of atoms per unit cell z=4 atoms Therefore,M= dNAa^3/zM= 8.926.023×1023(3.608×10−8)^3/4 = 63.1g/mol∴ Atomic mass of copper =63.1 g/mol

tX-ray diffraction studies show thatespper crystalizes in an fce unit cell with cell edge of 3.608a separate experiment, copper is determinedto have a density of 8.92 g cm3. Calculate the atomic mass ofNCERT Example 1.4)1.17cm. Ins 2

Answer»

In case of fcc lattice number of atoms per unit cell z=4 atoms

Therefore,M= d*NA*a^3/zM= 8.92*6.023×1023*(3.608×10−8)^3/4 = 63.1g/mol∴ Atomic mass of copper =63.1 g/mol