How much percent of nitrogen is present in atmosphere ?

What precentage of CO_2 os present in atmosphere?

How much per cent of water and proteins present in total cellular mass?

Nitrogenous bases present in DNA:

1 kg of water under a nitrogen pressure of 1 atmosphere dissolves 0.02 gm of nitrogenat 293 k. Calculate Henry' s law constant :

What concentration of nitrogen should be present in a glass of water at room temperature? Assume a temperature of 25^@C , a total pressure of 1 atmosphere and mole fraction of nitrogen in air of 0.78. (K_H for nitrogen=8.42xx10^-17 M/(mm Hg))

Which was not present in primitive atmosphere?