Which of the following best describes how an electron moves when it absorbs or releases exact amounts of energy?

Chemistry

2 answers:

const2013 [10]3 years ago

4 0

Answer: The correct option is B.

Explanation: As the electron moves from lower energy level to higher energy level, it absorbs some amount of energy. When the electron returns back from this higher energy level to the lower energy level, it emits the exact amount of energy it has absorbed.

As every orbital has its characteristic energy value, whenever electrons absorb or emit energy, they move to different energy level that is they occupy different orbitals and hence we can say that the electron moves between orbital levels.

Brrunno [24]3 years ago

3 0

B.The electron moves between orbital levels.

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Hey there!:

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3 years ago

A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K. Assuming constant pressure, what should the new vo

Mandarinka [93]

The answer is: [D]: " 417 cm³ " .
_____________________________________________________
Explanation: Use the formula:

V₁ /T₁= V₂ /T₂ ;

in which: V₁ = initial volume = 556 cm³ ;
                T₁ = initial temperature = 278 K ;
                V₂ = final ("new") temperature = 308 K
                T₂ = final ("new:) volume = ?

Solve for "V₂" ;

Since: V₁ /T₁= V₂ /T₂ ;

We can rearrange this "equation/formula" to isolate "V₂" on one side of the equation; and then we can plug in our know values to solve for "V₂" ;
_______________________________________________________
       V₁ /T₁= V₂ /T₂ ; Multiply EACH side of the equation by "T₂ " :

          → T₂ (V₁ /T₁) = T₂  (V₂ /T₂) ;
______________________________
to get:

↔ T₂  (V₂ /T₂) = T₂ (V₁ /T₁) ;

     → V₂ = T₂ (V₁ /T₁) ;
______________________________
Now, plug in our known values, to solve for "V₂" ;
______________________________
    → V₂ = T₂ (V₁ /T₁) ;
______________________________
    → V₂ = 308 K ( 556 cm³ /278 K) ;
             → The units of "K" cancel to "1" ; and we have:
________________________________________________________
    → V₂ = 308*( 556 cm³ / 278 ) = [(208 * 556) / 278 ] cm³ ;
Note: We will keep the units of volume as: "cm³ "; since all the answer choices given are in units of: "cm³ " ; {that is, "cubic centimeters"}.

   → [(208 * 556) / 278 ] cm³ = [ (115,648) / (278) ] cm³ ;

              → For the "(115,648)" ; round to "3 (three significant figures)" ;
                        → "(115,648)" → rounds to: "116,000" ;
____________________________________________________
              →      (116,000) / (278) = 417.2661870503597122 ;
                                 → round to 3 significant figures; → "417 cm³ " ;
                                               → which corresponds with "choice [D]".
______________________________________________________
The answer is: [D]: "417 cm³ " .
______________________________________________________

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3 years ago

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Orlov [11]

Answer:

The flask has to be closed during the hydrochloric acid and sodium carbonate reaction as the resultant gas got trapped inside the closed flask.

Explanation:

The hydrochloric acid and sodium carbonate reaction was exothermic that caused the pressure to decrease. The flask has to be closed during the hydrochloric acid and sodium carbonate reaction as the resultant gas got trapped inside the closed flask.

In exothermic reactions, energy is produced in the form of heat or light.

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