H₂Co₃

Mr(H₂Co₃) = 1*2+59*3=179

ω(H₂) =  2/179*100%=1%

ω(Co₃) = 177/179*100%=99%

Mr(H₂PO₃)=1*2+31*1+16*3=81

ω(H₂) = 2/81*100%=2,5%

ω(P) = 31/81*100%=38,3%

ω(O₃) = 48/81*100%=59,3%