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77julia77 [94]
3 years ago
12

1. In any nuclear reaction, nuclei are transformed in some way.

Chemistry
2 answers:
Anna71 [15]3 years ago
5 0

Answer:

1. True

2. true

3. True

4. False

Explanation:

1. In nuclear reaction, the nuclie are transformed to produce a large amount of energy. In fission reaction, one large nucleus breaks to form two small nucleus and produce energy. In fusion reaction,two nucleus combine to form a single large nucleus.

2. Uranium 235 used in nuclear reaction absorbs neutrons and form two smaller nucleus to produce  large amount of energy.

              Plutonium-239 also absorb neutrons and also fission with uranium-235 in a reactor.

3. Fusion reaction is uncontrollable. It occurs in the sun. It is a chain reaction which produce more and more energy along with neutrons. So it is uncontrollable.

Whereas , Fission reaction is controllable by using controlled rods.

4. Fusion reaction occurs at the sun to produce high temperature and energy and the sun glows.

Grace [21]3 years ago
4 0
<span>1. In any nuclear reaction, nuclei are transformed in some way.

True

2. Two fissionable substances commonly used in nuclear reactors and nuclear weapons include uranium-235 and plutonium-239.

True

3. Fission reactions can be controlled; thus, they are used to create energy and electricity. But fusion reactions are uncontrollable and require too much energy for economical use.

True

4. Fission reactions occur at such high temperatures in the Sun that the Sun appears to glow.

False

Hope this answers the question. Have a nice day.</span>
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VikaD [51]

Answer: 3 and 4 are the answers.

Explanation: i took the quiz.

7 0
2 years ago
the atomic masses of 63 cu (69.17 percent) and 65 cu (30.83 percent) are 62.94 and 64.93 amu, respectively. calculate the averag
docker41 [41]

Answer:

The average atomic mass of copper is 63.55 amu.

Explanation:

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7 0
2 years ago
Ome fire extinguishers contain liquid carbon dioxide Suggest how carbon dioxide​
melisa1 [442]

Answer:

The CO2 Extinguisher Cannisters contain carbon dioxide in liquid form, and when the extinguisher is let off the liquid is released into the air neutralising the oxygen that the fire is feeding on, disabling the fires ability to spread.

8 0
3 years ago
Phenols do not exhibit the same pka values as other alcohols; they are generally more acidic. Using the knowledge that hydrogen
nevsk [136]

Answer:

Phenols do not exhibit the same pka values as other alcohols;

They are generally more acidic.

Using the knowledge that hydrogen acidity is directly related to the stability of the anion formed, explain why phenol is more acidic than cyclohexane.

Explanation:

According to Bromsted=Lowry acid-base theory,

an acid is a substance that can release H^{+} ions when dissolved in water.

So, acid is a proton donor.

If the conjugate base of an acid is more stable then, that acid is a strong acid.

In the case of phenol,

the phenoxide ion formed is stabilized by resonance.

C_6H_5OH -> C_6H_5O^- +H^+

The resonance in phenoxide ion is shown below:

Whereas in the case of cyclohexanol resonance is not possible.

So, cyclohexanol is a weak acid compared to phenol.

7 0
3 years ago
A physician has ordered 0.50 mg of atropine, intramuscularly. If atropine were available as 0.25 mg/mL of solution, how many mil
sladkih [1.3K]
If 0.25mg of atropine is in 1mL
                  so
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x=\frac{0.5mg*1mL}{0.25mg}=2mL
6 0
3 years ago
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