a)1) 2Na + 2H2O = 2NaOH + H2
2) NaOH+HNO3(разб.)=NaNO3+H2O
б) 1) 2K+2H2O=2KOH+H2
2)2KOH+H2CO3=K2CO3+2H2O
в) 1) 2Cu + O2 = 2CuO
2)CuO + 2HCl(разб.) = CuCl2 + H2O
3)CuCl2 + Ca(OH)2 = Cu(OH)2 + CaCl2
4)Cu(OH)2---t=CuO+H2O
г) 1)2Ca+O2= 2CaO
2)CaO + H2O = Ca(OH)2
3)Ca(OH)2+HCl
4)Ca(OH)2 + 2HCl(разб.) = CaCl2 + 2H2O
д) 1) 2Zn+O2=2ZnO
2)ZnO + 2HNO3 = Zn(NO3)2 + H2O
3)Zn(NO3)2 + 2TlOH(разб.) = Zn(OH)2 + 2TlNO3
4) Zn(OH)2+H2SO4=ZnSO4+2H2O
е) 1) Ba + 2H2O = Ba(OH)2 + H2
2)Ba(OH)2+ 2CH3COOH= Ba(CH3COO)2+2H2O
Answer 4.8 g
а) 2*26.98 = 53.96
b) 3*16 = 48
48 + 53.96 = 101.96
c) m O2 = 10.2 * 48 / 101.96 = 4.8 g