H2S a toxic gas with rotten egg like smell is used for the qualitative analysis, if the solubility of H2S in water, at STP is 0.195 mole. kg–1,the Henry's law constant is

Solubility of H2S in water = 0.195m                                  = 0.195 mole/KgH2S is bubbled at STPAccording to Henry's law,                                                                                                        but    nsolute<<< nsolvent          By substituting the values,