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In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species....

In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species. H2O, H3O+, OCL-,OH-, HClO   

Please help me step by step I know that K=4.0*10^8

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