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g100num [7]
3 years ago
14

Light is admitted by electrons when they drop from one energy level to a lower level which transition results in the admission o

f light with the greatest energy
Level 2 to level 4
Level 3 to level 2
Level 4 to level 2
Chemistry
1 answer:
koban [17]3 years ago
3 0

The correct wording for the question is:

Light is emitted by electrons when they drop from one energy level to a lower leve. Which transition results in the emission of light with the greatest energy:

  • Level 2 to level 4
  • Level 3 to level 2
  • Level 4 to level 2

Answer:

  • Third option: level 4 to level 2.

Explanation:

The electron transition in an atom from an upper level of energy to a lower level of energy, i.e. the jump of an electron to a lower energy level, implies the emission of light energy and the release of energy of the electron, i.e. the electron changes its energy.

The larger the gap between the states that the electron jumps, the shorter the wavelength of the photon emitted, the higher its frequency and the energy emiited during such transition of the electron (remember energy is directly proportional to the frequency of the wave, and both are inversely related to the wavelength).

From the options given the larger jump is from level 4 to level 2, so that is the transition that results in the emission of light with the greatest energy, which is the last option.

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Saturated alkyne

Explanation:

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3 years ago
A dialysis unit requires 70000 mL of distilled water. How many gallons of water are needed? (1 gal = 4 qt)
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Answer: 19.25 gallons

Explanation: 1 ml = 0.0011 quart

Given:  4 quarts = 1 gallon

Thus if 1 ml is equal to 0.0011 quart

70000 ml  is equal to =\frac{0.0011}{1}\times 70000=77quart

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77 quarts is is equal to=\frac{1}{4}\times 77=19.25gallons




5 0
3 years ago
Read 2 more answers
A rock sample from the moon includes a mineral that contains small amounts of the radioactive isotope Potassium-40 and its daugh
Simora [160]

Answer:

There were originally 8 atoms of Potassium-40.

Explanation:

The half-life of a radioactive material is the time taken for half the original material to decay or the time required for a quantity of the radioactive substance to reduce to half of its initial value.

If the original material formed without any Argon-40, it means that the atoms originally present were Potassium-40 atoms.

Presently, there are 7 Argon-40 atoms for every 1 of Potassium-40, we can deduce the number of half-lifes the Potassium-40 has undergone as follows :

After one half-life, (1/2) there will be one Potassium-40 atom for every Argon-40 atom.

After a second half life, 1/2 × 1/2 = 1/4: there will be one Potassium-40 atom for every three atoms of Argon-40.

After a third half-life, 1/4 × 1/2 = 1/8: there will be one Potassium-40 atom for every 7 atoms of Argon-40.

Since there are 1/8 atoms of Potassium-40 presently, there were originally 8 atoms of Potassium-40.

6 0
3 years ago
g Ethanol boils at 78.4 °C with \DeltaΔHvap = 38.6 kJ/mol. A 0.200-mol sample of ethanol is heated from some colder temperature
andrezito [222]

Answer:

8.77 kilo Joules  will be the total amount of heat required for both the heating and the vaporizing.

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Heat required to heat 0.200 moles of ethanol = Q = 1.05 kJ

Enthalpy of vaporization of ethanol = \Delta H_{vap}=38.6 kJ/mol

Heat required to vaporize 0.200 moles of ethanol = Q'

Q'=\Delta H_{vap}\times 0.200 mol=38.6 kJ/mol\times 0.200 mol=7.72 kJ

Total heat required to fore heating and the vaporizing :

= Q + Q' = 1.05 kJ + 7.72 kJ = 8.77 kJ

8.77 kilo Joules  will be the total amount of heat required for both the heating and the vaporizing.

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