The henry’s law constant for he gas in h2o at 30℃ is 3.7 × 10−4 m/atm; that for n2 at 30℃ is 6.0 × 10−4 m/atm. if a gaseous he-n2 mixture that has a he mole fraction of 0.30 is placed over the waterthe concentration of dissolved he will be greater than that of dissolved n2.the concentration ratio of dissolved he to dissolved n2 would be 0.62.the concentration ratio of dissolved he to dissolved n2 will be 0.26.the concentration ratio of dissolved he to dissolved n2 will be 0.18.the concentration ratio of dissolved he to dissolved n2 will be 0.49.

According to arrhenius theory of acid and bases, an acid is a proton donor, while base donates hydroxyl ions. further, acid and base reacts to form salt and water.consider following example.hcl    +      h2o          →      cl-          +      h3o+here, hcl has donated a proton, hence it is an acid.now consider following reactionhcl      +      naoh            ↔      nacl      +        h2oin this reaction, hcl donates proton, hence it is acid. on other hand, naoh donates hydroxyl ion (i.e. hence it is a base.   

I'm not sur i'm sorry