1) 4P + 5O₂ = 2P₂O₅<span>
2) P</span>₂O₅ + 6NaOH = 2Na₃PO₄ + 3H₂O<span>
3) Na</span>₃PO₄ + 3AgNO₃ = 3NaNO₃ + Ag₃PO₄<span>
12.
1) 2Al + 3Cl</span>₂ = 2AlCl₃<span>
2) AlCl</span>₃ + 3NaOH = Al(OH)₃ <span>+ 3NaCl
3) 2Al(OH)</span>₃ =t= Al₂O₃ + 3H₂<span>O
13.
х г 50г
Na</span>₂CO₃ + CaCl₂ = CaCO₃<span> + 2NaCl
106г/моль 100 г/моль
х = 50*106 / 100 = 53 г</span>
Ответ:
H2, CH4, N2, CO, N2O, NO2.
Объяснение:
1) D N2 (H2)=28÷2=14;
2) D H2 (H2)=2÷2=1;
3) D CH4 (H2)=16÷2=8;
4) D CO (H2)=28÷2=14;
5) D N2O (H2)=44÷2=22;
6) D NO2 (H2)=46÷2=23.