Chemistry, 28.07.2019 04:00 carolyntowerskemp

Molecules that have longer arrows are moving faster. which statement describes what is happening in this system? a) molecules vibrate more as temperature decreases. b)temperature is not related to the average kinetic energy of a system. c)kinetic energy decreases as temperature decreases. d)there is no change in average kinetic energy between these two systems.

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The answer would be C) Kinetic energy decreases as temperature decreases, because temperature affects how fast molecules move. If it is hotter, then more kinetic energy, and if it is colder, then there is less kinetic energy.

Answer from: jasminemarie610

Option (C) is the correct answer.

Explanation:

When particles move from their initial position then the energy held by them is known as kinetic energy.

Kinetic energy of molecules of a substance is directly proportional to temperature.

Mathematically, K.E = $\frac{3}{2}kT$

where k = boltzmann constant

T = temperature

Therefore, an increase in temperature will increase the kinetic energy of particles.

Therefore, we can conclude that the statement kinetic energy decreases as temperature decreases, correctly describes what is happening in the given system.

Answer from: Quest

Ithink the answer is c i hope it my friend message me if i’m wrong and i’ll change my answer and fix it for you

Answer from: Quest

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form( $n_2$ ) .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

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Molecules that have longer arrows are moving faster. which statement describes what is happening in...

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