In a normal person expiratory reserve volume and residual volume were found to be 1000 ml and 1100 ml respectively. Find out his functional residual capacity?

In a normal person expiratory reserve volume and residual volume were found to be 1000 ml and 1100 ml respectively. How the functional residual capacity differ from the vital capacity?

10 ml of a gaseous hydrocarbon were mixed with 100 ml of oxygen and exploded in a eudiometre tube. The volume of residual gases was 95 ml of which 20 ml was absorbed by caustic soda and the remainder by pyragallol. The molecular formula of the hydrocarbon is

50 ml 10 N H_(2)SO_(4) , 25 ml 12N HCl and 40 ml 5N HNO_(3) were mixed together and the volume of the mixture was made 1000 ml by adding water. The normality of the resultant solution will be :

20% surface sites have adsorbed N _2 On heating N, gas is evolved from sites and were collected at 0.001 atm and 298 K in a container of volume 2.46 cm^3 . Density of surface sites is 6.02 xx 10^14 cm^(-2) and surface area is 1000 cm^2 Find out the number of surface sites occupied per molecule of N_2 .

A person inhales to his maximum capacity and then he exhales also to his maximum. What is the volume of air thus breathed out?