Объяснение:
1) NH4Cl + NaOH = NaCl + NH3 + H2O
NH4(+)+ Cl(-)+ Na(+) + OH(-) = Na(+) + Cl(-)+ NH3 + H2O
NH4(+)+ OH(-) = NH3 + H2O
2) NH4OH + HCl = NH4Cl + H2O
NH4OH+ H(+)+ Cl(-)= NH4(+)+ Cl(-)+ H2O
NH4OH + H(+) = NH4(+) + H2O
3) Na2CO3 + 2HCl = 2NaCl + CO2 + H2O
2Na(+) + CO3(2-) + 2H(+) + 2Cl(-) = 2Na(+) + 2Cl(-) + CO2 + H2O
CO3(2-) + 2H(+) = CO2 + H2O
4) Pb(OH)2 + 2NaOH = Na2PbO2 + 2H2O
Pb(OH)2 + 2Na(+) + 2OH(-) = 2Na(+) + PbO2(2-)+ 2H2O
Pb(OH)2 + 2OH(-)= PbO2(2-) + 2H2O
5) Cd(NO3)2 + 2NaOH = Cd(OH)2 + 2NaNO3
Cd(2+) + 2NO3(-)+ 2Na(+) + 2OH(-) = Cd(OH)2 + 2Na(+) + 2NO3(-)
Cd(2+) + 2OH(-)= Cd(OH)2
6) CO2 + 2NaOH = Na2CO3 + H2O
CO2 + 2Na(+) + 2OH(-) = 2Na(+) + CO3(2-) + H2O
CO2 + 2OH(-) = CO3(2-) + H2O
97.5g x
1.C6H6 + C3H6 = C6H5-C3H7
78g 120g
x=97.5·120/78=150g m=150·0.75=112.5g
112.5g x²
2.C6H5-C3H7 + O2 = C6H5-C3H7O2
120g 152g
x²=112.5·152/120=142.5 m=142.5·0.75=106.875g
106.875g x³
3.C6H5-C3H7O2 ⇒t⇒ C6H5-OH + C3H6O
152g 94g
x³=106.875·94/152=66g m=66·0.75=49.5g