An element crystallize in f.c. lattice with cell edge of 250 pm. Calculate the density if 300 g of this element contains2 xx 10^(24)atoms.

An element crystallize in f.c. lattice with cell edge of 250 pm. Calcu

1.	An element crystallize in f.c. lattice with cell edge of 250 pm. Calculate the density if 300 g of this element contains2 xx 10^(24)atoms.
Answer» Solution :MOLAR mass of the emlment (M) = `( 300)/(2xx 10^(24)) xx 6.02xx 10^(23)= 90.3 " G MOL"^(-1)` Density `(p)= (Z xx M)/(a^(3)xxN_(0))= (4xx90.3)/((250xx10^(-10))^(3) xx (6.02 xx 10^(23))) = 38.4 " g mol" ^(-3)`