1)M(вещ-ва)= D (по O2)*M(O2)= <span>0,875*32=28 г/моль
2) PV=vRT
PV=m/M*RT
m= PVM/ RT
m= </span><span>105,5*18.2*28/ 8.31*(22+273)=53762.8/ 2451.45=21.93 г</span><span>
</span>
Na2O, H2CO3, MgCl2, NaOH, N2CO3, H3PO4, Ca(OH)2, SO3, Fe(OH)3, H2SO4, N2O5, Al2(SO4)3, Ca3(PO4)2, CaO, Mg(OH)2, H2SiO3, Fe2O3, A
Анна123рус
Оксиды: Na2O, SO3, N2O5, CaO, Fe2O3, SO2
основания: NaOH, Ca(OH)2, Fe(OH)3, Al2(SO4)3, Mg(OH)2, Al(OH)3, CaOH
кислоты: H2CO3, H3PO4, H2SO4, H2SiO3, HCl, HNO3
соли: MgCl2, Al2(SO4)3, Ca3(PO4)2, NaNO3,CuCl2
C6H5-CH3+Cl2= C6H5-CH2Cl+HCl----------------X1
C6H5-CH2Cl+ NaOH(водный)= C6H5-CH2OH+NaCl--------X2
5C6H5-CH2OH+ 4KMnO4+6 H2SO4=5 C6H5COOH+2 K2SO4+4MnSO4+6H2O
C6H5COOH+Na=C6H5COONa+H2---------------X3
C6H5COONa+NaOH(сплавнение)=C6H6 +Na2CO3------X4
5(NH₄)₂C₂O₄ +2KMnO₄ + 8H₂SO₄ = 10CO₂ + 5(NH₄)₂SO₄ + K₂SO₄ + 2MnSO₄ +8H₂O
C₂O₄²⁻ - 2e = 2CO₂ 5
MnO₄⁻ + 8H⁺ +5e = Mn²⁺ + 4H₂O 2
5C₂O₄²⁻ + 2MnO₄⁻ + 16H⁺ = 2Mn²⁺ + 8H₂O + 10CO₂