What is Henry's law constant?

Among the following gases which gas has the highest Henry's law constant, K_H value in water at the same temperature ?

O_2 is bubbled through water at 293K, assuming that O_2 exerts a partial pressure of 0.98 bar, the solubility of O_2 in gm. L^(-1) is (Henry's law constant = 34 k bar)

If N_(2) gas is bubbled through water at 293 K, how many millimoles of N_(2) gas would dissolve in 1 litre of water ? Assume that N_(2) exerts a partial pressure of 0.987 bar. Given that Henry's law constant for N_(2) at 293 K is 76.48 k bar.

H_(2)S , a toxic gas with rotten egg like smell, is used for the qualitative analysis. If the solubility of H_(2)S in water at STP is 0.195m, calculate Henry's law constant.

If CO_(2) gas having a partial pressure of 1.67 bar is bubbled through 1 L water at 298 K the amount of CO_(2) dissolved in water in g L^(-1) is approximately. (Henry's law constant of CO_(2) is 1.67 K bar at 298 K )

State Henry's law.

H_2S a toxic gas with rottenegg like smell is used for the qualetative analysis, if the solubility of H_2S in water, at STP is 0.195 mole. kg^(-1) the Henry's law constant is

The quantity of CO_2 in 500ml of soda water when packed under 2.5 atm CO_2 pressure at 298 k is....... gm (Henry's law constant 1.67 xx 10^8 pa at 298K)

The air is a mixture of a number of gases. The major components are oxygen and nitrogen with approximate proportion of 20% is to 79% by volume at 298 K. The water is in equilibrium with air at a pressure of 10 atm. At 298 K if the Henry’s law constants for oxygen and nitrogen at 298 K are 3.30 xx10^(7) mm and 6.51 xx10^(7) mm respectively, calculate the composition of these gases in water .

What is Cryoscopic constant ?