a/zE a=p,e n=a-z nu-z k2l8m18n32o50p72q98 ewIwart u gory kwas:hcl,h2s(siarkow)h2so4(vi)h2so3(iv)h2co3,hno3,h3po4 sole:mgcl2,fe2s3(ek)fe2(so4)3(an)k3po4 amoniak:nh3 mex100/mz