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AveGali [126]
3 years ago
15

Which particle diagram represents a mixture? ( i hope you can read it)

Chemistry
1 answer:
Masja [62]3 years ago
8 0
The 3rd diagram is a mixture because it has 2 substances
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What is the Law of Conservation of energy?
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Answer:

<u>~</u><u>Law of Conservation of </u><u>energy~</u>

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When potassium metal is placed in water a large amount of energy is released as potassium hydroxide and hydrogen gas are produce
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Explanation:

2K(s)+2H_2O\rightarrow 2KOH(aq)+H_2(g)

The given reaction is redox reaction but not combustion reaction.

Redox reaction : It is a chemical reaction in which oxidation and reduction occurs simultaneously.Oxidation is gaining of electrons and reduction is loosing of electrons.

K\rightarrow K^++e^- oxidation

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Potassium when reacts with water ,gives potassium ion in aqueous medium and combines with hydroxide ion present in water to form potassium hydroxide where as H^+ ions of water by gaining electrons (from potassium in water) gives hydrogen gas.

Hence , yes it is a redox reaction

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Here in given reaction no oxygen molecule is appearing on reactant side.

Hence not a combustion reaction.

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