Please answer me ASAPA technique that uses a porous barrier (separation with pores) to separate heterogeneous mixtures is _______.

a. distillation

b. chromatography

c. filtration

d. crystallization

Answers

Answer 1

Answer:

Answer:

c.filtration is the answer

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Cuantas moléculas de oxigeno se producen por la descomposición de 28.5 g de H2O2 (masa molecular = 34.0g/mol) de acuerdo a la ecuación 2H2O2(l) → 2H2O(l)+O2(g)

In the ground state, has only 1 electron in a p orbital.A. carbon
B. fluorine
C. hydrogen
D. nitrogen
E. aluminum

Answers

Aluminium is the element you are looking for

(E) Aluminium is the answer

A container is filled with 4.0 g H2 and 5.0 02. How much water is produced

Answers

4.0 g water. Water is the limiting reactant. Therefore there will be excess oxygen.

Consider this equilibrium:N2(g) + 3H2(g) 2NH3(g) + energy.

Certain conditions provide less than 10% yield of NH3 at equilibrium. Which statement describes this equilibrium?

Answers

This is the complete answer, including the set of answer choices:

Certain conditions provide less than 10% yield of NH3 at equilibrium. Which statement describes this equilibrium?

A. The Keq is large and products are favored.
B. The Keq is small and products are favored.
C. The Keq is large and reactants are favored.
D. The Keqis small and reactants are favored.
E. The conditions of the reaction must be known to answer the question

To answer you must know that the equilibrium yield is the quantity of product obtained.

In this case it is 10% of NH3.

That means that the equilibrium is more favorable to the reactants.

Given that Ke relates the concentration of products / concentration of reactants, the answer is the Ke is small and reactants are favored

Final answer:

This equilibrium has a low yield of NH3 and can be improved by adjusting the conditions and using the principles of Le Chatelier.

Explanation:

This equilibrium can be described as an equilibrium with a low yield of NH3. The fact that less than 10% yield of NH3 is obtained suggests that the forward reaction (N2(g) + 3H2(g) -> 2NH3(g) + energy) is not favored under the given conditions. To increase the yield of NH3, the conditions can be adjusted to shift the equilibrium towards the product side.

The Le Chatelier's principle can be applied to achieve a higher yield of NH3. One possible way is to increase the concentration of the reactants (N2 and H2) or decrease the concentration of the product (NH3). Another way is to increase the temperature, as this reaction is exothermic. By increasing the temperature, the equilibrium will shift in the reverse direction to consume the excess energy.

In summary, this equilibrium is characterized by a low yield of NH3, which can be improved by adjusting the conditions and using the principles of Le Chatelier.

Learn more about Equilibrium here:

brainly.com/question/33747437

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It is believed the major reason for the decline in amphibian species is _______.a.
death through disease
b.
changing reproductive habits
c.
mutation
d.
climate change

Answers

The major reason for the decline in amphibian species is climate change.

Amphibians are organisms that can live on land and in water. They are

usually found around moist areas because they need water bodies to cool

off in order for their survival.

Climate change is characterized by an increase in temperature which

doesn't favor them as they lose more water which thereby threatens survival

and leads to their decline in the ecosystem.

Read more on brainly.com/question/17825266

Answer: It is believed the major reason for the decline in amphibian species is death through disease.

Explanation:

A scientist would most likely need to update her model when?

Answers

A scientist would most likely need to update his / her model when it no longer supports the latest results. This could mean that the scientist's model is shrinking or growing, thus, he / she has to update them. Updating them would also make the model appear more interesting.

The process of photosynthesis is essential in the oxygen/carbon dioxide cycle. Photosynthesis removes ______ from the atmosphere and produces and releases ______ into the atmosphere.A) glucose, oxygen
B) oxygen, glucose
C) carbon dioxide, oxygen
D) oxygen, carbon dioxide

Answers

Answer:

The answer is C) carbon dioxide, oxygen.

Explanation:

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.

So lets eliminate some answers:

Photosynthesis removes oxygen from the atmosphere and produces and releases glucose into the atmosphere.

Oxygen can not convert itself to glucose and plants don't take in oxygen so this answer is automatically eliminated

Photosynthesis removes oxygen from the atmosphere and produces and releases carbon dioxide into the atmosphere.

Plants take in carbon dioxide and convert it to oxygen basically how humans breath but inverted, not the other way around.

Photosynthesis removes glucose from the atmosphere and produces and releases oxygen into the atmosphere.

Glucose naturally is not found in the atmosphere in the first place so if a plant were to survive is would have to be in a glucose enriched environment which is very uncommon meaning it would be very rare to be a living functional plant that can photosynthesize. So this is checked off the list!

So we are now left with one sentence that would make sense

Photosynthesis removes carbon dioxide from the atmosphere and produces and releases oxygen into the atmosphere.

Plants take in carbon dioxide meaning the first section of this answer is right and they release oxygen which is also correct therefore this statement is valid and is the correct answer

Hope this helped (:

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