CHEMISTRY HIGH SCHOOL

What is a crystal?a. a type of rock
b. the smallest unit of an element
c. an artificial, decorative substance
d. a solid made of atoms arranged in an orderly fashion

Answers

Answer 1
Answer: A crystal is a solid made of atoms arranged in an orderly fashion .

answer: d. a solid made of atoms arranged in an orderly fashion.
Answer 2
Answer: D solid made of atoms arranged in an orderly configuration.

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Can someone solve 5 ?

Answers

Please what are we solving for
Is it oxidation number or what?

Bill stands near a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface. which process causes this difference in temperature?

Answers

I believe the answer is evaporative cooling

What type of chemical reaction is happening here? 8Fe + S8 --> 8FeS

Answers

This is a synthesis reaction since you are taking two elements and creating one (opposite of decomposition).  I think this might also classify as a redox reaction as well since it appears as if iron is being oxidized and sulfur is being reduced (iron is loosing electrons while sulfur is gaining electrons).

I hope this helps.  Let me know if anything is unclear.

Absorption of energy into the refrigerant causes a phase change from _____.solid to liquid
liquid to vapor
vapor to liquid
liquid to solid

Answers

liquid to solid i think

the answer is liquid to gas :)

Define the term ''pH' stand for?

Answers

PH tells us how acidic or alkali a solution is.
The Term pH stands for: Power of Hydrogen! 

Explain the difference between an endpoint and equivalence point in a titration

Answers

To know the end point we use phenolphthalein as indicator. Therefore, endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals.

What is titration?

Titration is a technique by which we know the concentration of unknown solution using titration of this solution with solution whose concentration is known. To know the end point we use phenolphthalein as indicator. End point is a point where completion of reaction happen.

Endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals. Endpoint is after Equivalence point.

Therefore, endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals.

To know more about titration, here:

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Answer:

Endpoint is point in which indicator change the color, and equivalence point is point in which there is equal amount of two chemicals. Endpoint is after Equivalence point.

Explanation:
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