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1.<span> = Fe(OH)3 ↓+ 3 NaCl
2.</span><span>=Fe3O4+4H2
3.</span><span>2FeO
</span>4.<span>Fe(OH)2 + Na2SO<span>4
</span></span>5.<span>FeCl2+Cu
</span>6.<span> FeS</span><span>
7.</span>Fe2O3+3H2O<span>
8.</span>2Fe+3CO2
9.<span>H2+FeCl2 </span>
Ca + 2HCl = CaCl2+H2
2Mg+O2=2MgO
2H2S+3O2=2H2O+2SO2
Fe2O3+3H2=2Fe+3H2O
CaCl2+2NaOH=Ca(OH)2+2NaCl