H₂S⁺⁴O₃ + H₂S⁻² → S⁰<span> + H</span>₂<span>O
</span>S⁺⁴ +4e⁻→ S⁰<span> 4 1 ( S</span>⁺⁴ окислитель)<span>
</span><span> 4
</span>S⁻² - 2e⁻ → S⁰<span> 2 2 (S</span>⁻² восстановитель<span>)
</span><span>
</span>H₂SO₃ + 2H₂S = 3S<span> + 3H</span>₂<span>O</span>
<span>a)S+O2=SO2</span>
<span>2SO2+O2=2SO3</span>
<span>SO3+H2O=H2SO4</span>
<span>H2SO4+Zn=ZnSO4+H2</span>
б)<span>2Mg+O2=2MgO</span>
<span>MgO+2HCl=MgCl2+H2O</span>
<span>MgCl2+2KOH=Mg(OH)2+2KCl</span>
<span>Mg(OH)2=MgO+H2O</span>
1. N2 + O2 = 2NO
n=2.67моль m=160г
n=5.33моль
Ответ:2.67 моль
2. Ca + O2 = 2CaO
m=120г n=6моль
n=3моль m=336г
Ответ:6моль; 336г
C + O₂(избыток) = CO₂
C + 4HNO₃ = <span>CO</span>₂<span>↑ + 4NO</span>₂<span>↑ + 2H</span>₂<span>O
C + HCl </span>≠
<span>C + CO</span>₂ = 2CO
<span>C + Na</span>₂SiO₃ ≠
<span>3C + 4Al = Al</span>₄C₃
<span>C + 2H</span>₂SO₄ = CO₂ + 2SO₂ + H₂O<span>
C + 2Cl</span>₂ = CCl₄
1) NaOH=Na+ + OH -
Оно ионное.
2) 2H2OH + 2H + SO4 = Na + SO4 + H2O
2H2OH + 2H = Na + H2O
Cтранное уравнение, записанно не верно.
NaOH+H2SO4→NaSO4+H2O
OH + 2H = H2O
Вот так скорее всего.