10 % sites of catalyst bed have adsorbed by `H_(2)` on Heating `H_(2)` gas is evloved from sites and collected at 0.03 atm and 300 K in a small vessel of `2.46 cm^(3)`.
no. of sites available is `5.4 xx 10^(16) ` per `cm^(2)` and surface area is `1000 cm ^(2)` . find out the no. of suface sites occupied per molecule of `H_(2)`.

Around 20% surface sites have adsorbed N_(2) . On heating N_(2) gas evolved form sites and were collected at 0.001 atm and 298 K in a container of volume 2.46cm^(3) the density of surface sites is 6.023xx10^(14)cm^(-2) and surface area is 1000cm^(2) find out the number of surface sites occupied per molecule of N_(2) .

At 1 atm and 273 K the volume of nitrogen gas required to cover a sample of silica gel, assuming Langmuir monolayer adsorption , is found to be 1.30 cm^(3)g^(-1) of the gel. The area occupoied by a nitrogen molecule os 0.16nm^(2) . Find out the no. of surface sites occupied per molecule of H_(2) .

A leaf having 10cm^(2) surface area grows 5cm^(2) per day. Calculate its relative growth rate

Twenty precent of the surface sites of a catalyst is occupied by nitrogen molecules. The density of surface sites is 6.023xx10^(14)cm^(-2) . The total sarface area is 1000cm^(2) . The catalyst is is henced to 300K and nitrogen is completely desorbed a pressure of 0.001 atm and volume of 2.46cm^(3) . Calculate the number of sites occupied by niitrogen molecules.

One gram molecule of nitrogen occupies 2 xx 10^(4) cm^(3) at a pressure of 10^(6) dyne cm ^(=-2). Given : N_(A)= 6 xx 10^(23). Which of the following is correct ?