Răspuns:
2
CO2 + H2O => H2CO3 reactie de combinare
2Al+ 3Cl2=>2 AlCl3 reactie de combinare
H2+ Cl2 => 2HCl reactie de combinare
K2O + H2O => 2KOH reactie de combinare
N2+3 H2=> 2NH3 reactie de combinare
3
2×23g 71g 2×58,5g
2Na + Cl2=> 2NaCl
69g xg yg
MNa=23g/mol
MCl2=2×35,5=71g/mol
MNaCl=23+35,5=58,5g/mol
x=69×71/2×23=calculează
y=69×2×58,5/2×23=calculează
