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Sagot :
Si reaccionan 50 g de silicio (P.A. = 28,08 g) con 80 % de pureza y suficiente oxígeno, se podría obtener A. 1,42 moles de SiO₂.
Consideremos la ecuación balanceada para la reacción entre silicio y oxigeno.
Si + O₂ ⇒ SiO₂
Tenemos 50 g de silicio con una pureza del 80%. La masa pura de silicio es:
[tex]50 g \times 80\% = 40 g[/tex]
Podemos calcular los moles de SiO₂ obtenidos a partir de 40 g de Si usando los siguientes factores de conversion:
- La masa molar de Si es 28,08 g/mol.
- La relación molar de Si a SiO₂ es 1:1.
[tex]40gSi \times \frac{1molSi}{28,08gSi} \times \frac{1molSiO_2}{1molSi} = 1,42 mol SiO_2[/tex]
Finalmente, convertiremos 1,42 moles de SiO₂ a gramos usando su masa molar (60,08 g/mol).
[tex]1,42 mol \times \frac{60,08g}{mol} = 85,3g[/tex]
Si reaccionan 50 g de silicio (P.A. = 28,08 g) con 80 % de pureza y suficiente oxígeno, se podría obtener A. 1,42 moles de SiO₂.
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