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bishbarmak02
1)2Ca+o2=2Cao
2)Cao+h2o=Ca(oh)2
3)Ca(oh)2+2co2=Ca(hco3)2+h2o
4)Ca(hco3)2+ca(oh)2=CaCo3
5)CaCo3+co2+h2o=Ca(hco3)2
6)Ca(hco3)2+H2so4=Caso4+Co2+h2o
2.P-фосфор,электронов 13
3.mp-pa=350+50=400г
W(kcl)=50/350*100=14,3%
Ответ:14,3%
4. 5Na2SO3 + 2KMnO4 + 3H2SO4 = 5Na2SO4 + 2MnSO4 + K2SO4 + 3H2O
S(+4)-2e = S(+6) 5 в-ль, ок-ие
Mn(+7) + 5 e= Mn(+2) 2 ок-ль, в-ие

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