1. Cu(OH)₂ + H₂CO₃ = CuCO₃ + 2H₂O
2. 2Al(OH)₃ + 3H₂SO₄ = Al₂(SO₄)₃ + 6H₂O
Al2O3, Na2S, NH3, BeB2, K2S, PbO2, As2O5
30×15 = 450см
S=450 т.к S=ab
60кг----100%
m(K)----20%
m(K)=60*20/100=1.2 кг=120000 мг
1 л----12 мг
V-------1200000
V(H2O)=1200000/12=100000 л