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Travka [436]
3 years ago
12

What do fossil fuels come from?

Chemistry
1 answer:
lyudmila [28]3 years ago
4 0

Answer:

Fossil fuels are found underneath the Earth's surface at varying depths. These fuels - coal, oil, and natural gas - were formed as a result of the remains of dead plants and organic matter being buried and altered over millions of years.

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What is the standard entropy change for the reaction below? 2 CO(g) + 2 NO(g) → N2(g) + 2 CO2(g) S o (CO(g)) = 197.7 J/(mol·K) S
photoshop1234 [79]

Answer:

\Delta _RS^o=-230J/(mol*K)

Explanation:

Hello,

In this case, for the given chemical reaction:

2 CO(g) + 2 NO(g) \rightarrow N_2(g) + 2 CO_2(g)

The standard entropy change is computed by subtracting the products standard enthalpy and the reactants standard enthalpy considering each species stoichiometric coefficients:

\Delta _RS^o=S ^o_{N2(g)}+2S ^o_{CO2(g)}-2S ^o_{CO(g)}-2S ^o_{NO(g)}\\\\\Delta _RS^o=191.6J/(mol*K)+2*213.8J/(mol*K) -2*213.8J/(mol*K) -2*210.8J/(mol*K)\\\\\Delta _RS^o=-230J/(mol*K)

Best regards.

3 0
3 years ago
Read 2 more answers
The average rate of a reaction is a good approximation of an instantaneous rate when?
Lunna [17]

The average rate of a reaction is a good approximation of an instantaneous rate when the concentration is measured during relatively brief time intervals.

At any point during such a little period, the average rate will be extremely near to the instantaneous rate. The average rate will differ from the instantaneous rates inside the period more when time intervals are longer.

The concentration change during a chosen time period is the average rate. When you take the measurements makes a difference.

The rate at a specific moment is known as the instantaneous rate. Finding the slope of the tangent to the concentration vs. time curve at that point yields the answer.

Learn more about comparison between average and instantaneous rate here brainly.com/question/17960561

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4 0
2 years ago
When particles are cooled down they: * vibrate more and move farther apart. vibrate less and stay in the same place. vibrate les
bekas [8.4K]
<span>Vibrate less and move closer together.</span>
3 0
4 years ago
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What is filtration??​
vichka [17]

Answer:

the action or process of filtering something.

Explanation:

Filtration is a physical, biological or chemical operation that separates solid matter and fluid from a mixture with a filter medium that has a complex structure through which only the fluid can pass.

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3 years ago
The diagram shows salt dissolved in water. What does it show about water molecules
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that they all dissolved went on watef

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