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OlgaM077 [116]
3 years ago
14

Which sample of copper has atoms with the lowest average kinetic energy? 1. 10. g at 45°C 2. 20. g at 35°C 3. 30. g at 25°C 4. 4

0. g at 15°C
Chemistry
2 answers:
blagie [28]3 years ago
7 0
I would say <span>4. 40. g at 15°C because kinetic energy is related to temperature and not mass, so the lower temp would give you lower KE</span>
maw [93]3 years ago
4 0

Answer: Option (4) is the correct answer.

Explanation:

Kinetic energy is the energy that occurs due to the motion of particles or object.

More is the temperature provided to an atom more will be the movement of its particles. Thus, more will be the average kinetic energy of the atom.

Similarly, less is the temperature provided to a metal then less will be the movement of its molecules. Hence, at low temperature movement of molecules will be less.

Thus, out of the given options 40 gram of copper at 15^{o}C will have the lowest average kinetic energy.

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Which ionic equation describes a redox reaction? A. Ag(+) + Cl- = AgCl B. 2H(+) + CO3(2-) = CO2 + H2O C. H(+) + OH(-) = H2O D. Z
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<u>Answer:</u> The correct option is D. Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu

<u>Explanation:</u>

Redox reaction is defined as the reaction in which oxidation and reduction take place simultaneously. It is known as the reaction in which the exchange of electrons takes place.  

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A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when the oxidation number of a species decreases.

From the given ionic reactions:

Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu

<u>On the reactant side: </u>

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<u>On the product side: </u>

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