2KCl (электролиз) = 2K + Cl2
K + O2 =t= KO2
4KO2 + 2H2O =t= 4KOH + 3O2↑
KOH + Na =t= NaOH + K
2K + H2 =t= 2KH
KH + K2O = KOH + 2K
2K + Cl2 = 2KCl
KCl + H2SO4 = KHSO4 + HCl↑
CaO + 3C = CaC2 + CO
CaC2 + 2HOH = Ca(OH)2 + C2H2
C2H2 + HOH (HgSO4) = CH3COH
CH3COH + Ag2O = CH3COOH + 2Ag
2CH3COOH + Ca = (CH3COO)2Ca + H2
37 Cl p=17 e=17 n=20
35 Cl p=17 e=17 n=18
Mr(CO2)=12+32=44г
D(H2)=44г/2г=22
D(возд)=44г/29г=1.52