1) Fe(OH)3 - Fe2O3
2) KNO2 - K2O + N2O3
3) H2SO4 - H2O + SO3
1. Al2O3 + 2NaOH = 2NaAlO2 + H2O
2. 2NaAlO2 + 4H2SO4 = Na2SO4 + Al2(SO4)3 + 4H2O
3. Al2(SO4)3 + 6NaOH = 2Al(OH)3 + 3Na2SO4
4. AL(OH)3 + H2SO4 = ALOHSO4 + 2 H2O
1)n=m/M.M
x=26.7/133.5
x=0.2
2)n=N/Na
0.2=N/6.02*10^23
N=0.2*6.02*10^23
N=1.204*10^23
<span>Na2SO4+BaCI2=2NaCl+BaSO4(бело-молочный осадок)</span>
C4H10+O2=CO2(уг.газ)+H2O(вода)