Mg+(NO3)2+2k+OH=Mg(OH)2+2KNO3 2K+NO3=2KNO3 Это не точно ответ. Над K поставь + а над NO gjcnfdm - .
M(NaCl)=400 г*0,25 = 100 г
m"(p-pa NaCl) = 400 г - 50 г = 350 г
ω"(NaCl) =100 г/350 г*100% = 28,57%
1. Zn+H2SO4(разбав.)=ZnSO4+H2
2. ZnSO4+NaOH=Na2SO4+Zn(OH)2
<span>3.Zn(OH)2=ZnO+H2O</span>
<em>Приветствую</em>
₁ ₂ ₃ ₄
CH₄ → C₂H₂ → C₆H₆ → C₆H₅NO₂ → C₆H₅NH₂
1. 2CH₄ = С₂H₂ + 3H₂↑
2. 3C₂H₂ = C₆H₆
3. C₆H₆ + HNO₃ = C₆H₅NO₂ + H₂O<span>
4. </span><span>C</span>₆<span>H</span>₅<span>NO</span>₂<span> + 3H</span>₂ <span>= C</span>₆<span>H</span>₅<span>NH</span>₂<span> + 2H</span>₂<span>O</span>