4P + 502 = 2P2O5
2Zn + O2 = 2Zn0
4Fe + 3O2 = 2Fe2O3
2Fe(OH)3+3H2SO3=Fe2 (SO3)3+6H2O
1)C4H10=C4H8+H2
2)2C3H6+9O2=6CO2+6H2O
3)C3H7Cl+KOH=C3H6+KCl+H2O
4)C5H12+8O2=5CO2+6H2O
6)C+2H2=CH4
CH4+Cl2=Ch3Cl+HCl
2Ch3Cl+2Na=C2H6+2NaCl
C2H6+Cl2=C2H5Cl+Hcl
C2H5Cl+NaOH=C4H8+NaCl+H2O
C4H8+6O2=4CO2+4h2O
2CH₃COOH+Cu(OH)₂= (CH₃COO)₂Cu + 2H₂O
2CH₃COOH+2K= 2CH₃COOK + H₂O
CH₃COOH + H₂ =СH₃COH + H₂O
36г--------67,2л-
2H2O=2H2+O2
х=18г---33,6л-
m(NaNO3)=100*0.05=5г
m2(раствора)=100-18=82г
w2(NaNO3)=5*100%/82=6,1%