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tangare [24]
2 years ago
15

Susana heats up a sample of red crystals. While the sample is being heated, a gas is released and a blue powder is left after th

e heating. Is the sample of red crystals an element or a compound? Explain your answer.
MY ANSWER:

The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.


SAMPLE ANSWER:

Susana's red crystal sample is a compound because it was broken down into a gas and blue powder. It is not an element because elements cannot be broken down into simpler substances by ordinary means, such as heating.


MAKE SURE TO INCLUDE AND ELABORATE ON THE FACT(S) THAT:


- Elements cannot be broken down into simpler substances.

[and]

- Compounds can be broken down into simpler substances.


I hope this helps! I wanted to post this for the help of future searchers.
Biology
1 answer:
Nonamiya [84]2 years ago
3 0

Answer:

You can use either your answer or the sample answer you gave. You are so nice by the way!

Explanation:

THE FOLLOWING ARE TWO ANSWERS YOU CAN CHOOSE FROM

ANSWER 1:

The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.

ANSWER 2:

The red crystals are compounds. This is because when the sample is heated, a GAS (element) is released and BLUE POWDER (element) is left. Two elements make up these red crystals. A compound can also be shown through color change - the RED crystals, when heated, turn into BLUE powder. Elements cannot be broken down into substances using physical force, like heating. So yes, this is a compound.

EITHER ONE YOU CHOOSE WILL BE CORRECT, JUST SAYING!

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How do CAM plants differ from C3 and C4
algol13

Answer:

C3 photosynthesis produces a three-carbon compound via the Calvin cycle while C4 photosynthesis makes an intermediate four-carbon compound that splits into a three-carbon compound for the Calvin cycle. Plants that use CAM photosynthesis gather sunlight during the day and fix carbon dioxide molecules at night.

Explanation:

3 0
2 years ago
The transport of molecules of a particular solute from inside an animal cell across the cell membrane to the extracellular fluid
Leona [35]

Answer:

the concentration of the solute is lower inside the cell than outside it

Explanation:

This question depicts the process of ACTIVE TRANSPORT, which is the movement of a substance against concentration gradient, hence, requires energy input (ATP) to occur. In this case, transporting a solute from inside an animal cell to the extracellular fluid across the cell membrane always requires energy.

This is because the concentration of solute inside the cell is much lower than that of the extracellular fluid, hence, to move the solutes against this concentration gradient (low to high), energy in form of ATP is required.

6 0
2 years ago
A team of biologists develop a new drug, and one team member hypothesizes that the drug is incapable of freely passing across th
matrenka [14]

Answer:

<em>B: The drug is a small charged molecule</em>

Explanation:

Substances can passively diffuse in and out of the cell via the cell membrane in two ways;

  • Simple diffusion
  • Facilitated diffusion

The cell membrane allows small molecules or ions to freely diffuse across it in response to concentration difference between the inner and outer parts of the cell membrane. This is known as simple diffusion.

In facilitated diffusion, special proteins in the cell membrane, known as channel/carrier proteins binds with molecules and facilitates their diffusion across the cell membrane by carrying them through special channels in the membrane.

Hence, to support the alternative hypothesis that the new drug will exhibit simple diffusion across the plasma membrane, the drug should be a small charged molecule.

<em>Correct option: B</em>

5 0
2 years ago
Read 2 more answers
Select the adaptations that occur in C4 plants but not C3 plants. a. Light and carbon reactions occur in separate cells. b. ATP
andrew11 [14]

Answer:

a. Light and carbon reactions occur in separate cells.  

b. ATP is used to move a three-carbon ferry molecule from bundle-sheath cells back to mesophyll cells.  

c. They require less water to live.  

g. These plants function better in the hot, sunny environments.

Explanation:

The plants which carry out C₄ pathway or Hatch and Slack pathway are called C₄ plants. Examples are maize, sugar cane, sorghum. They live in hot, dry or arid habitats. C₄ plants have dimorphic chloroplast. The chloroplast is in bundle sheath cells does not have grana and in the spongy mesophyll cells have chloroplasts with grana. So, light and carbon reactions occur in separate cells. C4 plants are more efficient in photosynthesis than the C₃ plants. There is no photorespiration in C₄ plants as Phospshoenol pyruvate (PEP) carboxylase enzyme.

8 0
2 years ago
The following figure shows a plant cell immediately after it has been placed in distilled water (A) and a plant cell that has be
DENIUS [597]

Answer:

Plant cell A has lower water potential than cell B. True

Plant cell B is isotonic to the fluid in the beaker. True

Plant cell B's water potential increased due to an increase in solutes inside the cell. False

Plant cell B is at equilibrium with the fluid in the beaker. True

Plant cell A has higher water potential than cell B. False

Plant cell A is at equilibrium with the fluid in beaker. False

Explanation:

Plant cell A has lower water potential than cell B. True

This statement is true because the water potential of A is -2 bars while that of B is zero bars.

Plant cell B is isotonic to the fluid in the beaker. = True

Isotonic solutions have equal water potential. Since the water potential of distilled water is zero and that of plant cell B is zero as well, plant cell B is isotonic to the fluid in the beaker.

Plant cell B's water potential increased due to an increase in solutes inside the cell = False.

An increase in solute inside the cell doe not increase water potential but rather reduces it.

Plant cell B is at equilibrium with the fluid in the beaker. = True

Plant cell B is at equilibrium with the fluid in the beaker because its water potential is zero since the negative solute potential is counterbalanced by the positive pressure potential.

Plant cell A has higher water potential than cell B = False.

Plant cell A has a lower water potential of -2 bars while plant cell B has a higher water potential of zero.

Plant cell A is at equilibrium with the fluid in beaker. = False.

Plant cell A is not at equilibrium with the fluid in the beaker, rather due to its negative water potential, water will move into the cell.

4 0
2 years ago
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