Odpowiedź :
Al2O3
mAl=27g/mol*2mol=54g
mO=16g/mol*3mol=48g
54:48=27:24=9:8
SiO2
mSi=28g/mol*1mol=28g
mO=16g/mol*2=32g
28:32=7:8
MgO
mMg=24g/mol*1mol=24g
mO=16g/mol*1mol=16g
24:16=3:2
SO2
mS=32g/mol*1mol=32g
mO=16g/mol*2=32g
32:32=1:1
SO3
mS=32g/mol*1mol=32g
mO=16g/mol*3mol=48g
32:48=2:3
CaO
mCa=40g/mol*1mol=40g
mO=16g/mol*1mol=16g
40:16=10:4=5:2
CO
mC=12g/mol*1mol=12g
mO=16g/mol*1mol=16g
12:16=3:4
CO2
mC=12g/mol*1mol=12g
mO=16g/mol*2=32g
12:32=6:16=3:8
H2O
mH=2mol*1g/mol=2g
mO=16g/mol*1mol=16g
2:16=1:8
FeO
mFe=56g/mol*1mol=56g
mO=16g/mol*1mol=16g
56:16=7:2
Fe2O3
mFe=56g/mol*2mol=112g
mO=16g/mol*3mol=48g
112:48=56:24=14:6=7:3