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svp [43]
3 years ago
7

You take a bottle of soft drink out of your refrigerator. The contents are liquid and stay liquid, even when you shake them. Pre

sently, you remove the cap and the liquid freezes solid.
Offer a possible explanation for this observation.
Chemistry
1 answer:
inna [77]3 years ago
3 0

Answer:

The correct answer is due to the difference in pressure inside and outside the bottle.

Explanation:

Liquids have melting and boiling points that depend on pressure and temperature. The pressure inside the bottle is higher than the pressure outside. This causes the melting point to drop, making the liquid freeze at a lower temperature than if it were at atmospheric pressure, and therefore has a lower temperature than it would freeze at atmospheric pressure. When the bottle is uncovered, the liquid becomes an atmospheric pressure, and due to the temperature acquired when the bottle was closed the liquid freezes.

Have a nice day!

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A challenge that could be seen when use of technology is increased is a(n) __________ in unemployment rates. 1 decrease 2 increa
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Increase

Unemployment could increase because robots could be used in place of human labor, which in turn means people lose their jobs.
4 0
3 years ago
PLEASE HELP, I NEED TO GET THIS DONE TODAY
luda_lava [24]

The balanced reaction is

3Na3PO4  +  2CuSO4  ------>  3Na2SO4  + Cu3(PO4)2

To balance this reaction of double displacement, we see first that this reaction maintain the valence numbers of every atom.

Then, to have the same value of Na in the two sides of the reaction we multiply for the number of the other side. So,

(Na3PO4)x 2

(Na2SO4)x3

As we can see either, we need to balance PO4 cause there are two molecules of this in the reactant side, so we have two molecules of PO4 in the product either.

Then we get

3Na3PO4  +  2CuSO4  ------>  3Na2SO4  + Cu3(PO4)2

To probe that balance was correct, you can verify that the charges are exactly the opposite.

4 0
3 years ago
Which statement about moons is NOT true?*
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Answer:

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6 0
4 years ago
How does crop rotation help preserve soil?
vitfil [10]

Answer:Crop rotation also helps to battle against the forces of erosion. Rotating crops helps to improve soil stability by alternating between crops with deep roots and those with shallow roots. Pests are also deterred by eliminating their food source on a regular basis. Crop rotation is the practice of growing a series of dissimilar or different types of crops in the same area in sequenced seasons. It is done so that the soil of farms is not used for only one set of nutrients. It helps in reducing soil erosion and increases soil fertility and crop yield. The goal of crop rotation is to reduce the amount of the pest population present in the soil. Some pathogens that cause diseases survive in the soil from year to year in one form or the other, usually as sclerotia, spores, or hyphae. Rotating to non-host crops prevents the buildup of large populations of pathogens.

Explanation: the answer would be 4

Increases soil fertility. ...

Increases crop yield. ...

Increase in soil nutrients. ...

Reduces soil erosion. ...

Limits concentration of pests and diseases. ...

Reduces the stress of weeds. ...

Improves the soil structure. ...

Reduces pollution.

5 0
3 years ago
Match each state of matter with the statement that best describes it.
Stells [14]

Answer:

State of matter is defined as a form in which matter can exist. There are four states of matter known till date. They are as follows:

Solid: Matter is said to be in solid state if it has definite shape and volume. The components of matter are closely packed and have fixed positions within the matter.

Liquid: In liquid state, matter has fixed volume but shape is not fixed, it takes the shape of container in which it is placed. The particles of liquid are close but can move freely or do not have fixed positions.

Gas: Matter in gaseous state has variable volume and shape. The particles of gas are very far from each other thus, they are in constant motion without any fixed position..

Plasma: This state of matter has variable shape and volume. It has neutral atoms, the number of ions and electrons are significant and can move freely in the matter. In order to make plasma, energy is required to strip electron from atom.

According to above definitions, the state of matter is matched with the given statements as follows:

Plasma-Particles are so hot that electrons are stripped from atoms.

Gas-It expands to fill the volume of the container.

Liquid-Particles move past each other freely but do not go fat apart.

Solid-It retains its shape regardless of the shape of the container.

Explanation:

I choose this because It understands how each plasma work.

7 0
3 years ago
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