N=N/Na. Na=6,02*10^23
N=n/Na
n=m/M. M(H2)=2g/mol
n=3/2=1,5moo
N=6,02*10^23*1,5=9,03*10^23
2Na+2H2O=2NaOH+H2nNa=6.9/23=0.3 моль
n H2=0.15 мольV H2=22.4*0.15=3.36 лm H2=3.35*0,0899 г/л=0.3 г<span> </span>
2Fe+3Cl2=2FeCl3
FeCl3+3NaOH=Fe(OH)3+3NaCl
2Fe(OH)3=Fe2O3+3H2O
Fe2O3+2Al=Al2O3+2Fe
Fe+2HCl=FeCl2+H2
FeCl2+2KOH=2KCl+Fe(OH)2
Fe(OH)2=FeO+H2O
3FeO+2Al=Al2O3+3Fe
2Na+O2=Na2O2
<span>2Na2O2=2Na2O+O2 </span>
<span>Na2O+H2O=2NaOH
</span>2NaOH+H2CO3=Na2CO3+2H2O
<span>Na2CO3+CO2+H2O=2NaHCO3
</span>NaHCO3+HNO3=NaNO3+H2O+CO2
<span>2NaNO3=2NaNO2+O2
</span>
Si + O2=SiO2
SiO2+2NaOH=Na2SiO3+H2O
Na2SiO3+2HCl=H2SiO3+2NaCl
H2SiO3=SiO2+H2O
<span>SiO2+2C=2CO+Si
</span>Si+Mg=Mg2Si
<span>Mg2Si+4H2O=Mg(OH)2+SiH4</span>