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DochEvi [55]
3 years ago
6

Which best describes nuclear fusion? O A nucleus spontaneously splits and absorbs energy O Two nuclei spontaneously combine and

absorb energy. O A nucleus collides with a neutron and splits, releasing energy. O Nuclei combine to form a heavier nucleus, releasing energy. ​
Chemistry
1 answer:
KIM [24]3 years ago
4 0

Answer: Nuclei combine to form a heavier nucleus, releasing energy. ​

Explanation:   e.g two deuterium nucleus (Hydrogen-2 isotopes) forms an He nucleus and energy is released.

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An atom with 5 protons, 6 neutrons, and 5 electrons has an atomic mass of amu.
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Compare and contrast chemical potential energy and elastic potential energy
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Discription and explain the formation of positive and negative ions​
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What stress will shift the following equilibrium system to the right? 2SO2(g) + O2(g) ⇌ 2SO3(g); ΔH= –98.8 kJ/mol Decreasing con
denpristay [2]

Answer:

Decreasing temperature.

Explanation:

  • Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.
  • The choices here:

1) Decreasing concentration of SO₂,

The concentration of  SO₂ decreases, so the reaction will be shifted to the left direction to suppress the decrease in SO₂ concentration.

2) Decreasing temperature,

ΔH= – 98.8 kJ/mol, the negative sign means that the reaction is exothermic and release the heat.

If the temperature decreased, this means that the products decrease, so the reaction will shift to the right to suppress the decrease in temperature.

<em>It is the right choice.</em>

3) Increasing concentration of SO₃:

Increasing concentration of SO₃ will shift the reaction to the left to suppress the effect of increasing the concentration of SO₃.

4) Increasing volume:

Increasing the volume will decrease the pressure.

Decreasing the pressure will shift the reaction of gases to the side of higher no. of moles (left side).

  • <em>So, the right choice is: Decreasing temperature.</em>

<em></em>

3 0
4 years ago
Plz help!<br><br> What needs to be added or taken away to cause a change in state?
stepladder [879]

Answer:

One change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.

4 0
4 years ago
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