MgO+SO2=MgSO3
Al2O3+3SO2=Al2(SO3)3
3MgO+P2O5=Mg3(PO4)2
Al2O3+P2O5=2AlPO4
50г ⇔ 100%
х ⇔ 10% х=50*10/100=5г
150г ⇔100%
х ⇔ 5% х=150*5/100=7,5г
((5+7,5)/(50+150))*100% = 6,25%=6%
HNO3 + Ca(OH)2 -> H2O + Ca(NO3)2
H+ + NO3- + 2Ca+3 + 2OH- -> H2O + 2Ca+2 + 2NO3-
H+ + 2ON -> H2O