Write the value of Avogadro's number.

Calculate the value of Avogadro's number from the following data Density of NaCl=2.165"g cm"^(-3) . Distance between Na^(+)andCl^(-) in NaCl crystal = 281 pm.

By X-ray diffraction it is found tht nickel ("at mass"=59g "mol"^(-1)) , crystallizes with ccp. The edge length of the unit cell is 3.5 Å . If density of Ni crystal is 9.0g//cm^(3) , then value of Avogadro's number from the data is:

Estimate the average mass density of a sodium atom assuming its size to be about 2.5 overset@A . (Use the known values of Avogadro’s number and the atomic mass of sodium). Compare it with the density of sodium in its crystalline phase : 970 kg m^-3 . Are the two densities of the same order of magnitude ? If so, why ?

Write the RQ value of Fats

Iron has a body centred cubic unit cell with the cell dimension of 286.65 pm. Density of iron ·is 7.87 g cm^(-3) Use this information to calculate Avogadro's number. (Atomic mass of Fe= 56.0 u)

Write the RQ value of Proteins

Write the RQ value of Glucose

Write the value of det (2I_3)

Explain the term Avogadro's number and mention some methods for determination of Avogadro's number. What is significance of Avogadro's number?