An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level 1. Which statement describes the most likely result?The first atom emits light with more energy.
The second atom emits light with more energy.
The first and second atoms absorb energy without emitting light.
The first and second atoms emit light with the same amount of energy.

Answers

Answer 1

Answer:

The correct option is this: THE FIRST ATOM EMITS LIGHT WITH MORE ENERGY.

In the question given above, the level 1 mentioned in the question refers to the ground state of the electrons while level 2 and level 3 refer to excited states of hydrogen electrons. When an atom is in an excited state, it possess more energy and it is unstable, thus, it tends to return to the ground state after sometime to attain stability. As the atom return to the ground state, it loses its energy by emitting light. The higher the level of excitation, the more the light that will be emitted when the atom is returning to the ground state. Thus, an atom returning to the ground state from level 3 has more energy and will emit more light when returning to the ground state than an electron in level 2.

Answer 2

Answer: The first atom emits light with more energy.

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In a closed container, the vapor pressure of 10 mL of ethanol at 20 degrees C is 5.85 kPa. What is the vapor pressure of 20 mL of ethanol at the same temperature?

Answers

Answer:

${P_2}=2.925\ kPa$

Explanation:

At same temperature and same number of moles, Using Boyle's law

${P_1}* {V_1}={P_2}* {V_2}$

Given ,

V₁ = 10 mL

V₂ = 20 mL

P₁ = 5.85 kPa

P₂ = ?

Using above equation as:

${P_1}* {V_1}={P_2}* {V_2}$

${5.85\ kPa}* {10\ mL}={P_2}* {20\ mL}$

${P_2}=\frac{{5.85}* {10}}{20}\ kPa$

${P_2}=2.925\ kPa$

While testing amylase activity, John uses a buffer of pH 6 and substrate starch. He incubates them at 104ºF (40ºC). All the tubes show glucose formation, except one, which had no starch solution. Why did this happen?A) the optimum pH for enzyme amylase is not pH 6
B) the optimum temputure for the enzyme amylase is not 104. F (40.)
C) the substrate for amylase, starch, is not present

Answers

While testing amylase activity, John uses a buffer of pH 6 and substrate starch. He incubates them at 104ºF (40ºC). All the tubes show glucose formation, except one, which had no starch solution because the substrate for amylase, starch, is not present so thats why it does not show glucose formation
so correct option is C
hope it helps

Answer:

Explanation:

What is the common name for calcium silicate?

Answers

halliburton is the common name for it

What kind of energy transformation occurs in a gasoline-powered car? A.
Chemical energy is converted into mechanical energy.

B.
Mechanical energy is converted into light energy.

C.
Light energy is converted into sound energy.

D.
Sound energy is converted into chemical energy.

Answers

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c. 3
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Answers

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What effect does the presence of dissolved sodium fluoride have on the dissociation equilibrium of hydrofluoric acid? (select all three that apply)...The percent dissociation of HF is reduced by the presence of dissolved NaF.
THe pH of the solution containing NaF and HF would be higher than that of a solution of HF only.
The presence of NaF drives the reaction towards the HF side to reach equilibrium.
The concentration of H+ is higher in an HF solution containing NaF.
The pH of the solution containing NaF and HF would be lower than that of a solution of HF only.
The presence of the dissolved NaF does not affect the HF equilibrium reaction nor the equilibrium concentrations.

Answers

The correct answer for the question that is being presented above is this one: "The pH of the solution containing NaF and HF would be lower than that of a solution of HF only.; THe pH of the solution containing NaF and HF would be higher than that of a solution of HF only."

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