D₀₂=Mr(CO2)/32=44/32=1.375
Dh₂=Mr(CO2)/2=44/2=22
D₀₂=Mr(CH4)/32=16/32=0.5
Dh₂=Mr(Ch4)/16/2=8
<span>M(C3H8O) = 3*12+8*1+16 = 60
W(O) = 16/60 = 0.267=26.7%
</span>
H2SO4+CuO=CuSO4+H2O
m(H2SO4)=40*0.1=4г
V(H2SO4)=4/98=0.4 моль
V(CuSO4)=V(H2SO4)=0.4
m(CuSO4)= 0.4*160=64г
CuCl2 + 2NaOH = Cu(OH)2 + 2NaCl
Cu(2+) + 2Cl(-) + 2Na(+) + 2OH(-) = Cu(OH)2 + 2Na(+) + 2Cl(-)
Cu(2+) + 2OH(-) = Cu(OH)2
2KCl+Pb(NO3)2=PbCl2+2KNO3
2K+ + 2Cl- + Pb2+ + 2(NO3)- = PbCl2 + 2K+ + 2(NO3)-
Pb2+ + 2Cl- = PbCl2