а) H2O m(H):m(O)=2:16=1:8б)CaOm(Ca):m(O)=40:16=5:2в)Ca(OH)2m(Ca):m(O):m(H)=40:32:2=20:16:1
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а) H2O
m(H):m(O)=2:16=1:8
б)CaO
m(Ca):m(O)=40:16=5:2
в)Ca(OH)2
m(Ca):m(O):m(H)=40:32:2=20:16:1