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Olenka [21]
3 years ago
5

Which statements describe an element? Check all that apply.

Chemistry
2 answers:
Tems11 [23]3 years ago
8 0

Answer:

A,B,E

Explanation:

A) Elements can't be physically separated.

B) Elements are indeed made of only one type of atom

E) Elements cannot be broken down into a simpler form, at least not without a ton of energy being released as an explosion :)

Sav [38]3 years ago
8 0

Answer:

A,B,E

Explanation:

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egoroff_w [7]

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3 years ago
Consider the following reaction at constant pressure. Use the information provided below to determine the value of ΔS at 473 K.
Elis [28]

Answer:

The reaction will be spontaneous

Explanation:

To determine if the reaction will be spontaneous or not at this temperature, we need to calculate the Gibbs's energy using the following formula:

\Delta G= \Delta H - T * \Delta S

<u>If the Gibbs's energy is negative, the reaction will be spontaneous, but if it's positive it will not.</u>

Calculating the \Delta G= -1267 - 473 K* \Delta S :

\Delta G= -1267 - 473 K* \Delta S

Now, other factor we need to determine is the sign of the S variation. When talking about gases, the more moles you have in your system the more enthropic it is.

In this reaction you go from 7 moles to 8 moles of gas, so you can say that you are going from one enthropy to another higher than the first one. This results in: \Delta S>0[/tex}Back to this expression: [tex]\Delta G= -1267 - 473 K* \Delta S

If the variation of S is positive, the Gibbs's energy will be negative always and the reaction will be spontaneous.

4 0
3 years ago
What type of a reaction occurs when potassium metal reacts with fluorine gas?
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Exothermic Synthesis

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What is the definition of an atmosphere? a portion of the electromagnetic spectrum that makes the sky look blue the blanket of g
goldenfox [79]

Answer:

the blanket of gases that surrounds Earth and some other planets

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The best definition of the atmosphere is that it is a portion of the earth that is a made up of a blanket of gases.

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  • The earth's atmosphere is divided into many different layers.
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  • This troposphere is the closest layer to the surface.
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Hi, can someone help me with chemistry
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Idk look it up on another website
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