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2 years ago

When an electron moves from a lower energy level to a higher energy level, the atom:

Chemistry

1 answer:

Ede4ka [16]2 years ago

5 0

Answer:

A. absorbs light

Explanation:

For an electron to move from a lower energy level to a higher energy level, energy needs to be added to the atom.

In most cases this required energy will be light: The electron of the atom will absorb the energy of the light and move to a higher energy level.

When said electron comes back to the lower energy level, the atom will conversely give off light.

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Why do scientists use spiral tubes instead of straight ones?

elixir [45]

Answer:

Heat and mass transfer of a LiBr/water absorption heat pump system (AHP) was experimentally studied during working a heating-up mode. The examination was performed for a single spiral tube, which was simulated for heat transfer tubes in an absorber. The inside and outside of the tube were subjected to a film flow of the absorption liquid and exposed to the atmosphere, respectively. The maximum temperature of the absorption liquid was observed not at the entrance but in the region a little downward from the entrance in the tube. The steam absorption rate and/or heat generation rate in the liquid film are not constant along the tube. Hence the average convective heat transfer coefficient between the liquid film flowing down and the inside wall of the tube was determined based on a logarithmic mean temperature difference between the tube surface temperature and the film temperature at the maximum temperature location and the bottom. The film heat and mass transfer coefficients rose with increasing Reynolds number of the liquid film stream.

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3 years ago

Approximately how often does the moon revolve around the earth?

dmitriy555 [2]

Answer: A

Explanation: NO CAP..................... A!!!!!!!!!!!!!!

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2 years ago

Question 6 A certain ionic compound has a solubility in water of at . Calculate the greatest mass of that could be dissolved in

emmainna [20.7K]

Complete Question:

A certain ionic compound X has a solubility in water of .765g/ml at 5 degrees C. Calculate the mass of X that's dissolved in 3 L of a saturated solution of X in the water at this temp. Be sure your answer has the correct unit symbol and significant digits.

Answer:

2.29 kg

Explanation:

A saturated solution is a solution that has the maximum amount of solute diluted at it, so if more solute is added, it will precipitate. The solutions can also be unsaturated (when more solute can be dissolved) or supersaturated (when there is more solute dissolved than the maximum. It's a very unstable solution).

The saturation is measured by the solubility, which indicates how much mass of the solute can be added to a certain volume of the solvent. So, the solubility (S) is the mass (m) divided by the volume (V).

For a solution with 3 L = 3000 mL,

S = m/V

0.765 = m/3000

m = 3000 * 0.765

m = 2295 g

m = 2.29 kg

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3 years ago

Which is the most effective action for people to take in order to reduce greenhouse gas emissions? O taking the bus more often O

n200080 [17]

Answer:

Taking the bus more often

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3 years ago

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HELPPP which one has four energy levels Si, Ge, or Sn???

vaieri [72.5K]

Answer:

Explanation:

pretty sure im on high school 12th

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3 years ago