AYUDA?
AYUDA! Tengo que sacar el peso molecular de estos compuestos : - Al2 SO3 - K2O - Na2o - CaSO4 - PbCl2 - Li2O - NaOH - FeO - Fe2O3 - Mn2O7 - Hg2O - Al2O3 - V2O5 - MgO - CuO - PlO2 - OCdO PORFAVOR!
Mejor respuesta
Al2 (SO3)3
Al : 2 x 27 = 54 g / mol
S : 3 x 32 = 96 g / mol
O : 9 x 16 = 144 g / mol
```````````````````````````` Mm = 297 g / mol - K2O
K : 2 x 39 = 78 g / mol
O : 1 x 16 = 16 g / mol
`````````````````````````` Mm = 94 g / mol - Na2O
Na : 2 x 23 = 46 g / mol
O : 1 x 16 = 16 g / mol
```````````````````````````````` Mm = 62 g / mol - CaSO4
Ca : 1 x 40 = 40 g / mol
S : 1 x 32 = 32 g / mol
O : 4 x 16 = 64 g / mol
`````````````````````````````` Mm = 136 g / mol - PbCl2
Pb : 1 x 207 = 207 g / mol
Cl : 2 x 35.
45 = 70.
9 g / mol
```````````````````````````````````` Mm = 277.
9 g / mol - Li2O
Li : 2 x 7 = 14 g / mol
O : 1 x 16 = 16 g / mol
```````````````````````````` Mm = 30 g / mol - NaOH
Na : 1 x 23 = 23 g / mol
O : 1 x 16 = 16 g / mol
H : 1 x 1 = 1 g / mol
```````````````````````````````` Mm = 40 g / mol - FeO
Fe : 1 x 56 = 56 g / mol
O : 1 x 16 = 16 g / mol
```````````````````````````` Mm = 72 g / mol - Fe2O3
Fe : 2 x 56 = 112 g / mol
O.
3 x 16 = 48 g / mol
`````````````````````````````````` Mm = 160 g / mol - Mn2O7
Mn : 2 x 55 = 110 g / mol O : 7 x 16 = 112 g / mol
`````````````````````````````````` Mm = 222 g / mol - Hg2O
Hg = 2 x 200.
6 = 401.
2 g / mol O = 1 x 16 = 16 g / mol
`````````````````````````````````````` Mm = 417.
2 - Al2O3
Al : 2 X 27 = 54 g / mol O : 3 x 16 = 48 g / mol
`````````````````````````````` Mm = 102 g / mol - V2O5
V : 2 x 51 = 102 g / mol
O : 5 x 16 = 80 g / mol
`````````````````````````````` Mm = 182 g / mol - MgO
Mg : 1 x 24 = 24 g / mol O : 1 X 16 = 16 g / mol
`````````````````````````````` Mm = 40 g / mol - CuO
Cu : 1 x 63.
5 = 63.
5 g / mol O : 1 x 16 = 16 g / mol
`````````````````````````````````` Mm = 49.
5 g / mol - PtO2
Pt : 1 x 195 = 195 g / mol O : 2 x 16 = 32 g / mol
`````````````````````````````` Mm = 227 g / mol - CdO
Cd = 1 x 112.
4 = 112.
4 g / mol O = 1 x 16 = 16 g / mol
```````````````````````````````````````` Mm = 128.
4 g / mol.
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