5-1.Na2O CaO Fe2O3 CO2 P2O5
5-2. Mn2O3(III) MnO(II) MnO2(IV) Mn2O7(VII) MnO3(VI)
5-3. оксиды медиI медиII железаII железаIII марганцаIII марганцаIV серыIV фосфораV серыVI марганцаVII рутенияVIII
5-4. наибольшее в CO
наименьшее в HgO
5-5. M(Mn2O3)=158g/mol
wMn=110/158*100%=69.6%
wO=100-69.6=30.4%
M(Cu2O)=144g/mol
wCu=128/144*100%=80%
wO=20%
MCO2=44g/mol
wC=12/44*100%=27.3%
wO=72.7%
MAl2O3=!02g/mol
wAl=54/102*100%=53%
wO=47%
5-6.
1.S-50% O-50%
50%/32=1.5 50%/16=3
1.5:3=1:2
SO2
2. Mn-49.6% O-50.4%
49.6/55=0.9 50.4/16=3.15
0.9:3.15=2:7
Mn2O7
3. C-42.8% O-57.2%
42.8/12=3.5 57.2/16=3.5
3.5:3.5=1:1
СО
4. Pb-86.6% O-13.4%
86.6/207=0.4 13.4/16=0.8
0.4:0.8=1:2
PbO
5.Cu-80% O-20%
80/64=1.25 20/16=1.25
1.25:1.25=1:1
CuO
6. P-56.4% O-43.6%
56.4/31=1.8 43.6/16=2.7
1.8:2.7=1:1.5=2:3
P2O3