Calculate the edge length of the unit cell of sodium chloride given density of NaCI is `2.17 xx 10^(3) kgm^(-3)` and molecular weight `58.5 xx 10^(-3)kg mol^(-1)`.

The edge length of the unit cell of NaCl crystal lattice is 5.623Å , density is 2.16g cm^(-3) and the molar mass of NaCl is 58.5 g " mol "^(-1) . The number of moles per unit cell is

The density of an ideal gas is 1.25xx10^(-3)g cm^(-3) at STP. Calculate the molecular weight of the gas.

A copper cube of mass 0.50kg is weighed in water. The mass comes out to be 0.40 kg. Is the cube hollower solid ? Given density of copper =8.96 xx 10^(3)"kgm"^(-3) and density of water =10^(3) "kgm"^(-3).

A tank contains water and mercury as shown in . An iron cube of edge 6cm is in equilibrium as shown. What is the fraction of cube inside the mercury ? Given density of iron =7.7xx10^(3) "kgm"^(-3) and density of mercury =13.6xx10^(3) "kgm"^(-3).

What is the density of ocean water at a depth, where the pressure is 80.0 atm, given that its density at the surface is 1.03 xx 10^(3) kg m^(-3) ? Compressibilty of water = 45.8 xx 10^(-11) Pa^(-1) . Given 1 atm. = 1.013 xx 10^(5) Pa .

A uniform copper wire of mass 2.23 xx10^(-3) kg carries a current of 1 A when 1.7 V is applied across it. Calculate the length and the area of cross section, if the wire is uniformaly stretched to double its length, calculate the new resistance. Density of copper is 8.92xx10^3 kgm^(-3) and resistivity is 1.7xx10^(-8) Omega m.