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Over [174]
3 years ago
6

Identify, and briefly explain, two key elements needed for fossilization.Please Help Me!!!

Chemistry
2 answers:
Yakvenalex [24]3 years ago
7 0
Body elements and trace fossils I believe
Natali [406]3 years ago
4 0

Answer:

When plant or animals after being alive are preserved in sedimentary rocksis called <em>"taphonomy"</em> or fossilization; when they die in a watery environment, and after soft tissues are decomposed, the hard body parts such as shells and bones are turned into a mold when the sediments harden over time.

<em>High pressure</em> is key to generate the mineralization.

<em>Anoxic preservation</em> is also key, which is the condition of being shielded and safe from oxygen to avoid erosion or corrosion.

And of course, the entity must <em>contain hard body parts</em> that could linger over time.

Explanation:

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What are possible reasons for a percent yield that is under 100%
matrenka [14]

Answer:

              Percentage Yield is given as,

                 %age Yield  =  Actual Yield / Theoretical Yield × 100

This shows that the %age yield is directly depending upon the actual yield. And most of the time the percentage yield is less than 100 % because of the following factors.

Impure Starting Materials:

                                           If the starting materials (reactants) are not pure then reaction will not completely form the desired product. Different by products will form which will decrease the %age yield.

Incomplete Reactions:

                                     Not all reactions go to completion. In many reactions the starting material after some time stops forming the product due to different conditions. Some reactions attain equilibrium and stop increasing the amount of product. While, in some reactions a by products (like water) formed often react with the product to give a reverse reactions. Hence, the chemistry of reactions also causes the decrease in %age yield.

Handling:

               Another major reason for decrease in yield is handling the product. Always some of the product is lost during the workup of the reaction like, taking TLC, doing solvent extraction, doing column chromatography, taking characterization spectrums. So, we can conclude that the %age yield will always be less than 100%.

5 0
3 years ago
Good science does not depend on interactions within the scientific community.<br> True<br> False
Aloiza [94]
I believe the answer is true
4 0
3 years ago
Read 2 more answers
Pls help . I don't know this one .
aliya0001 [1]
The answer is the first one, Xe
5 0
3 years ago
Can someone help me with this molar mass problem?[It’s the last one]
quester [9]

Answer:

54.18 \times 10^{23} \ moles in 3 mole of  Al_2(SO_4)_3

Explanation:

It is clear that in the given 1\ mole of Al_2(SO_4)_3 have 3\ ions of SO_4^2^-

Therefore 3 moles of Al_2(SO_4)_3 will have 3\times3=9 \ ions of   SO_4^2^-

Since 1 ion of anything is equivalent to 6.02\times10^{23} \ moles

Therefore 3 moles of Al_2(SO_4)_3 will have 3\times3=9 \ ions of   SO_4^2^-

Which is equivalent to 9 \times6.02\times10^{23}=54.18\times10^{23} \ moles

Thus 3 moles of  Al_2(SO_4)_3 gives 54.18\times10^{23} \ moles of  SO_4^2^-.

5 0
3 years ago
Which of the following best describes an ecosystem in a California tide pool?
frosja888 [35]

Answer: i think your answer is<u> The giant green anemones, the ochre sea stars, and the red octopuses</u> because an ecosystem means all the organisms and the physical environment with which they interact. If not then your other option would be <u>A a school of fluffy sculpins.</u>

Hope this helped you!

8 0
2 years ago
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