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4 years ago

How can heat from the sun transfer from the cement to your feet

1 answer:

6 0

The sun is beating down on the concrete. it's a hot day, and you're in the house where it's conditioned. Your feet are fairly cool. When you step outside on the concrete the coldness in your feet seep into the concrete, and the heat from the concrete takes the cold away. It's like when a pot is on the stove, the pan transfers all it's cold to the hot, and the fire replaces the cold. Hope this helps!

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Which substance in this redox reaction is the oxidizing agent?

zepelin [54]

Answer: The correct answer is Option B.

Explanation:

Oxidizing agent is the agent which oxidizes the other substance and itself gets reduced. It undergoes reduction reaction in which, it gains electrons and also the oxidation state of the substance gets reduced.

Reducing agent is the agent which reduces the other substance and itself gets oxidized. It undergoes oxidation reaction in which, it looses electrons and the oxidation state of the substance is increased.

For the given chemical equation:

$Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2$

Half reactions for the given chemical reaction:

$Cu\rightarrow Cu^{2+}+2e^-$

Copper is loosing 2 electrons, thus it is undergoing oxidation reaction and is considered as a reducing agent.

$Ag^++e^-\rightarrow Ag$

Silver ion is gaining 1 electron per atom, thus it is undergoing reduction reaction and is considered as an oxidizing agent.

Hence, $AgNO_3$ is considered as an oxidizing agent and therefore the correct answer is Option B.

6 0

3 years ago

What will molecules do at -272 degrees celsius

enot [183]

Molecules will be very calm at - 272 °C.

<h3>Explanation:</h3>

According to the temperature scale, the least temperature that we can ever achieve in our practical life is - 273°C. This is the temperature from where our kelvin scale of temperature or absolute temperature starts.

The temperature of a substance is the practical manifestation of the internal energy of the substance. And this internal energy is actually reserved in form of molecular vibrations of the substance. With increasing heat, the temperature of the substance increase because of the increase in molecular vibrations of the substance. With decrease in temperature, the vibrations lessen untill - 273°C or 0K where they become completely still. So cooling beyond that point isn't possible. So at - 272°C or 1K, the molecules will be very lightly vibrating and they will have the least possible internal energy.

6 0

3 years ago

N which group do all atoms have eight valence electrons in the ground state?

goldenfox [79]

Alkaline Earths hope this helps :)

7 0

4 years ago

May someone help me unscramble these. -unnecessary comments will be reported.

ryzh [129]

Answer:

Potassium

Explanation:

The symbol for the element with a mass number of 169 is Tm for Thulium.

The letters to unscramble are S, Si, Tm, P, Au, and o.

The mystery element is Potassium.

Hope that helps.

8 0

3 years ago

Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional

Vlad [161]

Can anyone help me with my one question on my stuff?

7 0

3 years ago

Read 2 more answers