PO = P2O5
HgO = HgO (они друг друга компенсируют)
HO = H2O (формула воды)
CO = CO2 (углекислый газ)
AlO = Al2O3
CaO = CaO
NO = N2O5
C2H6+Br2=C2H5Br+HBr
C2H5Br+KOH=C2H5OH+KBr
3C2H5OH<span> + </span>K2Cr2O7<span> + 4</span>H2SO4<span> → </span>Cr2(SO4<span>)3 + </span><span>3CH3CHO + </span>K2SO4<span> + </span>7H2O<span>
</span>CH3CHO+H2=C2H5OH
2C2H5OH=CH2=CH-CH=CH2+2H2O+H2
A.
52.8g xg
BaCl2+(NH4)2SO4=BaSO4↓+2NH4Cl
132g 233g
x=52.8·233/132=93.2g
b.
200g xg
BaCl2+(NH4)2SO4=BaSO4↓+2NH4Cl
132g 233g
x=200·233/132=353g