2H20==>2H2+O2
n(h20)=27г/18=1.5 моль
n(o2)=1/2n(h20)=0.75
V(o2)=0.75*22,4=16,8 л
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2CrO3 +2 NH3 = Cr2O3 + 3H2O + N2
2Cr(+6) +6e = 2Cr(+3) 1 ок-ль, в-ие
2N(-3) -6e = N2(0) 1 в-ль, ок-ие
Mn2O7 + 2NH3 = 2MnO2 + N2 + 3H2O
2Mn(+7) + 6e = 2Mn(+4) 1 ок-ль, в-ие
2N(-3)-6e = N2(0) 1 в-ль, ок-ие
85% от 1000 грамм = 850 грамм
CaCO3 (t)= CaO + CO2
850/100 = x/22.4
x = (850*22.4)/100 = 190.4 л
<span>S + 2Cu = Cu2S
</span><span>Cu2S + 2H2O = 2Cu + SO2 + 2H<span>2
</span></span><span>SO2 + 2NaOH = Na2SO3 + H2O
</span><span>Na2SO3 + 2HCl = 2NaCl + SO2 + H2O
</span><span>2SO2 + O2 = 2SO<span>3
</span></span><span>SO3 + H2O = H2SO4
</span>