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____ [38]
3 years ago
14

Burning magnesium gives us magnesium oxide. This is an example of a reaction.

Chemistry
2 answers:
frez [133]3 years ago
5 0

Answer: -

Oxidation, Oxygen

Explanation: -

Burning of magnesium gives us magnesium oxide.

The chemical symbol of magnesium is Mg.

The chemical symbol of magnesium oxide is MgO.

So, the balanced chemical equation is

2Mg + O2 – 2 MgO.

We see that the element added is O Oxygen. So, the reaction is oxidation.

In oxidation always, oxygen is the common element involved in all chemical reactions of this kind.

VikaD [51]3 years ago
3 0

The given reaction can be represented as,

2Mg (s) + O_{2}(g) ---> 2MgO (s)

In this reaction, two elements (Mg and O_{2}) combine to form a single compound, MgO. Hence, this reaction is an example of chemical combination or synthesis. Here as the element Mg is oxidized in the presence of O_{2} to form MgO. This is referred to as combustion reaction. In combustion reaction, elements or compounds react with oxygen to give their respective oxides.

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Determine el PH y el % de disociación de una solución de ácido débil, sabiendo que se disuelven 20 gramos del ácido (masa molar=
IceJOKER [234]

Answer:

pH = 4.27. Porcentaje de disociación: 0.03%

Explanation:

El pH de un ácido débil, HX, se obtiene haciendo uso de su equilibrio:

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Donde la constante de equilibrio, Ka, es

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1.65x10⁻⁸ = [H⁺] [H⁺] / [0.1732M]

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Reemplazando

5.35x10⁻⁵M / 0.1732M * 100

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Answer:

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