Mr(BaSO4)=137+32+16*4=425 г/моль
W(O)=64/425*100=15%
Mr(KClO4)=39+35,5+16*4=138,5 г/моль
W(O)=64/138,5*100=46%
Mr(BaSO4)=137+32+16*4=425 г/моль
W(O)=64/425*100=15%
Mr(KClO4)=39+35,5+16*4=138,5 г/моль
W(O)=64/138,5*100=46%