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mario62 [17]
2 years ago
13

How does a duckling become a bigger and stronger adult duck?

Chemistry
2 answers:
Basile [38]2 years ago
8 0

Answer: The correct answer is C.

Explanation: Hope this helps plz mark brainliest.

kiruha [24]2 years ago
4 0

Answer: C. growth

Explanation: because why not

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2 years ago
What compound is this?
Nezavi [6.7K]

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Carbon Tetrachloride

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1 Carbon atom, 4 chlorine atoms (hence "tetra" prefix)

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Which of the following describes a perpetual-motion machine?
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a motor that requires no energy input once it is running

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Is cutting your nails a physical or chemical change
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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
Ann [662]

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

2H^++2e^-\rightarrow H_2 reduction

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.

6 0
2 years ago
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