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1 year ago

What classifies a substance as an element?

Chemistry

1 answer:

Dafna11 [192]1 year ago

8 0

Elements cannot be broken down into simpler substances by any or series of chemical reactions.

A compound can be broken done by chemical reactions

<h3>Element and compound</h3>

An element can be defined as species of atoms having a certain number of protons in their nuclei and pure substance of that species.

Elements cannot be broken down into simpler substances by any or series of chemical reactions.

A compound can be defined as a chemical substance that is composed of numerous identical molecules containing atoms from more than one element and held together by chemical bonds.

A compound can be broken done by chemical reactions

Learn more about chemical properties here:

https://brainly.in/question/78631

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You know that energy cannot be created or destroyed, so what happens to it?

riadik2000 [5.3K]

Mass cannot be created nor destroyed as well.

So, energy just goes into other things.

Example: you are born. You have carbon dioxide in your body, (or star dust). When you die, your body releases that gas.

Make sense?

I hope this helps! (:

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2 years ago

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1) Alarge doud of dust and gas spread out in a large area is

alexdok [17]

Answer:

D. nebula

Explanation:

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2 years ago

The different plants and animals in an environment. what is the answer for this meaning

Verdich [7]

Answer:

biodiversity

Explanation:

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3 years ago

What is 0.000028474 in scientific notation

antiseptic1488 [7]

Answer:

$2.8474 \: \times \: {10}^{ - 5}$

this the solution

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3 years ago

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Decreasing the temperature of the reaction 3H2 + N2<----->2NH3. In this reaction, the product absorbs heat. WHICH WAY WILL

AURORKA [14]

$3H_{2}$ + $N_{2}$ ⇔ $2NH_{3}$

Decreasing the temperature of the reaction,the reaction shifts forward.

The explanation is given below.

Explanation:

If the temperature of the reaction mixture is increased,then the equilibrium will shift to decrease the temperature.

If the temperature of the reaction mixture is decreased,then the equilibrium will shift to increase the temperature.

During the formation of the ammonia,it gives off heat.So it is an exothermic reaction.

$3H_{2}$ + $N_{2}$ ⇔ $2NH_{3}$

A decrease in the temperature favors the reaction that is exothermic (the forward reaction)because it produces energy.Therefore,if the temperature is decreased,the yield of the ammonia increases.

<em>Therefore if the temperature is increased,the reaction shifts forward and the yield of the ammonia increases and it is an exothermic reaction.</em>

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3 years ago