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Masteriza [31]
3 years ago
7

Carbon dioxide is commonly found as a solid (dry ice) or a gas (carbon dioxide gas). Jeff's teacher asked him to draw models to

show the motion of carbon dioxide molecules that make dry ice different from carbon dioxide gas. Describe what was correct and what might be improved about Jeff's models in showing the motion of the carbon dioxide molecules that make dry ice different from carbon dioxide gas

Chemistry
2 answers:
Andrei [34K]3 years ago
5 0

Answer: dry ice is a solid which makes it different from a gas

Explanation:

zlopas [31]3 years ago
5 0

Answer:

An image is given for reference.

Explanation:

  • Dry ice is also named as CO 2 and gets its name as it does not melt into a liquid when heated, and instead, it directly changes into a gas by the process of sublimation.
  • When energy is being transferred from one state to another the CO 2 gas is pressurized and refrigerated. In terms of molecular motion and kinetic energy, gas molecules can exert pressure and molecules moves in up and down direction.

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The synthesis of ATP by oxidative phosphorylation, using the energy released by movement of protons across the membrane down the
AlexFokin [52]

Answer:

It is an example of coupling an exogenic reaction to an endogenic reaction.

Explanation:

The endergonic reaction is typically being pushed by coupling it to strongly exergonic reaction. This is in most cases via shared intermediates. Most chemical reactions are endergonic in nature. In other word, the are not spontaneous (i.e ΔG>0). Energy must also be applied externally to initiate the reactions. The reactions can also be coupled to exergonic reactions (with  ΔG<0) to initiate them through a process known as share intermediate. Because Gibbs Energy can be summed up (i.e is a state function), the combined  ΔG  of the coupled reaction will be thermodynamically favorable.  The decomposition of calcium carbonate is a typical example.

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3 years ago
the grade of coal increases with (remember a higher grade of coal means it produces more energy when burned) quizlet
Aleks04 [339]

The grade of coal increases with compaction.

<h3>What is Compaction?</h3>

When something is crushed or compressed, it becomes compacted. After being collected, trash is often compressed to make it smaller and take up less room. Compaction is the process of making anything more compact, dense, or firmly packed.

grade of coal - The highest grade of coal is anthracite. It is a black, glossy, hard, brittle coal that is frequently referred to as hard coal. It has a high proportion of fixed carbon and a low proportion of volatile matter. Between subbituminous and anthracite, bituminous coal is the intermediate rank of coal.

to learn more about  compaction go to -

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5 0
2 years ago
A gas sample has volume 3.00 dm3 at 101
gavmur [86]

Answer:

V₂ = 21.3 dm³

Explanation:

Given data:

Initial volume of gas = 3.00 dm³

Initial pressure = 101 Kpa

Final pressure = 14.2 Kpa

Final volume = ?

Solution;

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

101 Kpa × 3.00 dm³ = 14.2 Kpa × V₂

V₂ = 303 Kpa. dm³/  14.2 Kpa

V₂ = 21.3 dm³

Explanation:

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3 years ago
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DiKsa [7]

Answer:

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Explanation:

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6. The fusion of 4 H-1 nuclei to produce two positrons and one other nuclei.​
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Explanation:

Normally, fusion involves two heavy hydrogen nuclides but since we have 4 light hydrogen nuclides, two of which underwent positron emission, thus changing two protons into neutrons plus 2 positrons and 2 neutrinos. The resulting nucleus from this fusion reaction is an He-4 nucleus.

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