What is the Ka of a 0.168 M solution of hydrocyanic acid
(HCN) with a pH of 3.15?
Ka = [ ?] 10

Its a hope this

Hbr dissociates to form h+ and br-ca(oh)2 dissociates to form ca2+ and 2oh-the h+ and oh- react to form waterassuming the reactants are dissolved in water, the net reaction is h+ + oh- —> h2oif you’re asked to show all components of the reaction, the complete reaction is 2hbr + ca(oh)2 —> cabr2 + 2h2o

Answer ozone (o3) is made of three atoms of oxygen, it is a molecule;