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lawyer [7]
3 years ago
13

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 re

acción?
Chemistry
1 answer:
konstantin123 [22]3 years ago
5 0

Answer:

1.30 g

Explanation:

La reacción que toma lugar es:

  • 2Mg + O₂ → 2MgO

Primero <u>convertimos 3.28 g de MgO en moles</u>, usando su <em>masa molar</em>:

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

Después <u>convertimos 0.081 moles de MgO en moles de O₂</u>, usando los <em>coeficientes estequiométricos</em>:

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

Finalmente<u> convertimos 0.0407 moles de O₂ en gramos</u>:

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