`a,KCl`
`PTK=39+35,5=74,5(đvC)`
`b,FeO`
`PTK=56+16=72(đvC)`
`c,ZnCl_{2}`
`PTK=65+35,5,2=136(đvC)`
`d,Fe(OH)_{2}`
`PTK=56+(16+1).2=90(đvC)`
`e,AlCl_{3}`
`PTK=27+35,5.3=133,5(đvC)`
`f,ZnO`
`PTK=65+16=81(đvC)`
`g,Zn(OH)_{2}`
`PTK=65+(16+1).2=99(đvC)`
`h,FeS`
`PTK=56+32=88(đvC)`
`i,AlCl_{3}`
`PTK=27+35,5.3=133,5(đvC)`