Ag2S
PCI3
NH3
CO2
Na(I)Cl(I)
Ca3(II)P2(III)
Al(III)Cl3(I)
C(IV)Cl4(I)
Mr(Ag2S)=108×2+32=248
Mr(MgO)=24+16=40
Ag2S
PCI3
NH3
CO2
Na(I)Cl(I)
Ca3(II)P2(III)
Al(III)Cl3(I)
C(IV)Cl4(I)
Mr(Ag2S)=108×2+32=248
Mr(MgO)=24+16=40
PCl3
NH4
CO2
Na(1)Cl(1)
Ca(2)P(3)
Al(3)Cl(1)
C(4)Cl(1)
Zn(2)