completeaza urmatorul tabel :

Completeaza Urmatorul Tabel class=

Răspuns :

Ca(OH02 ,M=72 ,Rmasa=Ca:O:H=20:16:1 ,%Ca=54,05 %O=43,24%H=2,70
Na2CO3  ,M=106,Rmasa=Na:C:O=23:6:24,%Na=39,65%C=10,34%O=41,37
CuSO4 ,M=162 ,Rmasa=Cu:S:O=2:1:2, %Cu=%O=40 ,%S=20