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completeza si egaleaza ecuatiile reactiilor.....va rog urgent.....
?+HCl=FeCl2+?
H2SO4+?=Na2SO+?
CaO+?=Ca(NO3)2+?
H2SO4+?=BaSO4+?
?+Cu(OH)2=CuCl2+?
HCL+?=AgCl+?