Răspuns:
Explicație:
CaO + H2O =Ca(OH )2 [ MCaO=40 +16=56 ; MH2O=2+16=18]
56g + 18g = 74g [ MCa(OH)2=40 +2.16 +2=74]
74g=74g
H2SO4 + BaCl2= BaSO4 + 2HCl [M H2SO4=2+32+4.16=98 ]
98g + 208 = 233g + 73g [ MBaCl2=137 + 2.35,5=208 ]
306g=306g [ MBaSO4=137 +32 +4.16=233 ]
[MHCl= 1+ 35,5=36,5 ]
HgCO3= HgO + CO2 [ MHgCO3=201 + 12 + 3.16=261 ]
261g = 217g + 44g [MHgO=201 +16=217 ]
261g=261g [MCO2=12 +2.16=44 ]