1)СaC2+HOH=ацетилен+СaO
2)ацетилен+HCI= CH2=CH-CI
<span>Hg-2, O-2, K-1, S-2, B-3, O-2,Zn-2, O-2, Mn-4, O-2, Ni-2, O-2, Cu-1, O-2, Sn-4, O-2, -3, O-2, S-6, O-2, As-5, O-2, Cl-7, O-2.</span>
1.Fe2O3+3C=2Fe+3CO
<span>m(C)=1000\160*3*12:0,98
г</span>
Ca(oh)2+2h3po4 = ca(h2po4)2 + 2h2o
<span>H2S
+ Br2 = 2HBr + S
</span><span>H2S + HNO3 = S+2NO2+2H2O
2FeCl3 + H2S = 2FeCl2 + S + 2HCl
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