tonjawhite7609 tonjawhite7609
  • 25-03-2021
  • Chemistry
contestada

Se combustionan 2 g de magnesio en Aire, obteniéndose 3,28 g de óxido de magnesio (MgO)¿Qué masa de oxígeno se consumen en la reacción?

Respuesta :

maacastrobr
maacastrobr maacastrobr
  • 27-03-2021

Answer:

1.30 g

Explanation:

La reacción que toma lugar es:

  • 2Mg + O₂ → 2MgO

Primero convertimos 3.28 g de MgO en moles, usando su masa molar:

  • 3.28 g ÷ 40.3 g/mol = 0.081 mol MgO

Después convertimos 0.081 moles de MgO en moles de O₂, usando los coeficientes estequiométricos:

  • 0.081 mol MgO * [tex]\frac{1molO_2}{2molMgO}[/tex] = 0.0407 mol O₂

Finalmente convertimos 0.0407 moles de O₂ en gramos:

  • 0.0407 mol O₂ * 32 g/mol = 1.30 g
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