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STALIN [3.7K]
3 years ago
11

Does anyone understand this question?

Chemistry
2 answers:
tino4ka555 [31]3 years ago
8 0
For this question you need to find out all of the stages of a star and the process of a nuclear fusion. Then compare what's different about it and what's the same.
Marrrta [24]3 years ago
5 0

Answer:

False

Explanation:

A <em>main sequence star</em> is a star that fuses hydrogen into helium.

A massive star needs a higher pressure and temperature at its core to keep itself from collapsing.

It must burn up its core supply of hydrogen <em>more rapidly</em> than a less massive star.

As a result, it spends less time in the main sequence before it becomes a red giant.

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Which of the following measurements is used to measure the enthalpy of neutralization?
Lana71 [14]
The answer is going To be measuring the change in temperature of a beaker of water
3 0
3 years ago
A small sample of methane burns, producing co2 and water vapor. as the hot gas mixture expands, it releases 120.0 kj of heat and
IceJOKER [234]

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

  • What is energy?

Energy is a property that is transferred to a physical system, recognizable in the performance of work and in the form of heat and light.

A small sample of methane undergoes combustion. As the hot gas mixture expands, it releases energy (E).

  • It releases 120.0 kJ of heat. By convention, when heat is released, we assign it a negative sign. Thus, q = -120.0 kJ.
  • It does 830.0 kJ of work. By convention, when the system does work on the surroundings, we assign it a negative sign. Thus, w = -830.0 kJ.

The change in the energy is the sum of the heat released and the work done.

ΔE = q + w = -120.0 kJ + (-830.0 kJ) = -950.0 kJ

A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.

Learn more about energy here: brainly.com/question/13881533

8 0
2 years ago
Does SiO2 also equal Si2O4?<br> (silicon atom 1 oxygen atom 2 = silicon atom 2 oxygen atom 4?)
Norma-Jean [14]

Answer:

7

Explanation:

that is the anwer of the question

8 0
3 years ago
Why is it more difficult to remove an
Tom [10]
In general, the further away an electron is from the nucleus, the easier it is for it to be expelled. In other words, ionization energy is a function of atomic radius; the larger the radius, the smaller the amount of energy required to remove the electron from the outer most orbital. For example, it would be far easier to take electrons away from the larger element of Ca (Calcium) than it would be from one where the electrons are held tighter to the nucleus, like Cl (Chlorine). Hope this helped a little not the exact answer though :)
3 0
3 years ago
A mineral that has _______ can be split fairly easily along planes with weak atomic attraction. A. hardness B. luster C. streak
Tomtit [17]
<span>A mineral that has CLEAVAGE can be split fairly easily along the planes with a weak atomic attraction. Technically a mineral may have a luster but it isn't the cause of it's split. Additionally, hardened minerals is the opposite of what is being discussed and I cannot truly remember what "streak" meant in regards to minerals.</span>
8 0
3 years ago
Read 2 more answers
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