<span>FeCl2+NH4OH=Fe(OH)2+NH4Cl
</span><span>CaSO3+2HNO3=H2SO3+Ca(NO3)2
</span><span>Ca(NO3)2+K2CO3=2KNO3+CaCO3
</span><span>MgSO4+2HF=MgF2+H2SO4
</span><span>Cu(OH)2+CH3COOH - реакции не идет
</span><span>Na2SiO3+H2SO4=Na2SO4+H2SiO3</span>
NaOH + HCl = NaCl + H2O
Ba(OH)2 + 2HNO3 = Ba(NO3)2 + 2H2O
BaCl2 + Na2CO3 = BaCO3↓ + 2NaCl
Ba(NO3)2 + K2CO3 = BaCO3↓ + 2KNO3
ДаноW(C)=54.55%=0.5455gW(H)=9.09%=0.0909gW(O)=36.36%=0.3636gД(н2)=22Найти СхНуOzРешениеMr(CxHуOz)= 2*Дн2=2*22=44СхНуОz/44 = 0.5455/12: 0.0909/1:0.3636/16СхHyOz =2:4:1 C2H4OОтвет формула выглядит так CH3-C=O | H