The density of iridium is `22.4 g/cm^3`. The unit cell of iridium is fcc. Calculate its radium given molar mass is 192.2 g/mol.

When gold crystallizes, it forms face-centred cubic cells. The unit cell edge length is 408 pm. Calculate the density of gold. Molar mass of gold is 197 g/mol.

Niobium forms bcc structure. The density of niobium is 8.55 g cm^-3 and length of unit edge is 330.6 pm. How many atoms and unit cells are present in 0.5g of niobium?

An atom crystallises in fcc crystal lattice and has a density of 10 g cm^(-3) with unit cell edge length of 100 pm. Calculate number of atoms present in 1 g of crystal.

A spherical drop of oil falls at a constant speed of 4 cm//s in steady air. Calculate the radius of the drop. The density of the oil is 0.9 g//cm^3 , density of air is 1.0 g//cm^3 and the coefficient of viscosity of air is 1.8 xx 10^-4poise , ( g = 980 cm//s^2 )

Calculate the number of atoms in 39.4 g gold.Molar mass of gold is 197 g / mole

Copper crystallizes into a fcc structure and the unit cell has length of edge 3.16xx10^(-4) cm. Calculate the dentsity of copper if the molar mass of Cu is 63.5g mol^-1