А хз хз хз хз хз хз юююююбюююббюю
1) Cr₂O₃+3H₂ = 2Cr+ 3H₂O
2) 2Fe(OH)₃ = Fe₂O₃+ 3H₂O
3) Na₂O+ H₂O = 2NaOH
4) H₂SiO₃ = H₂O + SiO₂
<span>5) Al</span>₂<span>O</span>₃<span> + 3H</span>₂<span> = 2Al + 3H</span>₂<span>O</span>
1)Ba(oh)2+na2co3 =>baco3+2naoh
2)Ba(oh)2+ 2na+ Co3 2- => baco3+ 2na+ + 2oh-
3)ba(oh)2 + co3 2- => baco3 + 2oh-
CxHy
Mr(CxHy) = D H₂ * Mr(H₂) = 13 * 2 = 26
x = (92,31*26)/(12*100) = 2
y = (7,69*26)/(1*100) = 2
Ответ: C₂H₂.