3 years ago

How is coal formed and why is it considered a nonrenewable resource? (Site 1)

2 answers:

7 0

Answer ; Pressure and heat turned plants into a substance now known as coal. Coal is considered an energy source because it takes lots of of years to form.

Elanso [62]3 years ago

6 0

Answer:

Coal is formed under the ground when pressure is high and there is a lot of heat also to make coal you need dead and composed organisms put together all of this makes a lump of dark coal.

Explanation:

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What would happen to life if earth were in a different location within the solar system

chubhunter [2.5K]

Closer=Burn
Farther=Freeze
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4 years ago

Sodium (Na) and potassium (K) are in the same group in the periodic table. Sodium is in the 11th position. How many valence elec

lapo4ka [179]

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3 years ago

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A gas mixture contains oxygen, nitrogen, and carbon dioxide. It has a pressure of 250 mmHg. If the pressure of oxygen is 50 mmHg

kondor19780726 [428]

Answer:

$P_{CO_2}=25mmHg$

Explanation:

Hello there!

In this case, according to the Dalton's law, which explains that the total pressure of a gaseous system equals the sum of the partial pressures of the gases composing, for the gaseous mixture composed by oxygen, nitrogen and carbon dioxide it would be possible to write:

$P_{tot}=P_{N_2}+P_{O_2}+P_{CO_2}$

Now, given the pressure of the system and those of oxygen and nitrogen, we calculate that of carbon dioxide as shown below:

$P_{CO_2}=P_{tot}-P_{N_2}-P_{O_2}\\\\P_{CO_2}=250mmHg-50mmHg-175mmHg\\\\P_{CO_2}=25mmHg$

Best regards!

4 0

3 years ago

Which of the following statements is true?

frez [133]

Answer: D

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3 years ago

Using the law of conservation of energy what is the kinetic energy at D

seraphim [82]

Answer:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another.

Explanation:

This means that a system always has the same amount of energy, unless it's added from the outside.

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3 years ago