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Goryan [66]
3 years ago
9

21. When does a nuclear fission reaction occur? A. When a nucleus is cut in two using a really sharp knife. B. When two nuclei c

ollide and combine to one. C. When a large nucleus spontaneously is divided for no apparent reason. D. When the electric forces within the nucleus are stronger than the nuclear forces.
Chemistry
1 answer:
Anestetic [448]3 years ago
7 0

Answer:

C

Explanation:

It's not A because you can't use a knife to cut an atom nucleus.  Its size is not perceptible to the eye.

It's not B because when two nuclei collide and combine into one, it's call fusion.

It's not D because you can't have stronger forces than the ones holding the nucleus together.

The correct answer is C.

To fission, the nucleus needs to have at least two things: critical mass (only big ones can fission spontaneously) and instability (incorporate a neutron ).

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A solution is prepared by dissolving 38.6 g sucrose (C12H22O11) in 495 g of water. Determine the mole fraction of sucrose if the
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Answer:

4.09×10⁻³ is the mole fraction of sucrose

Explanation:

Mole fraction = Moles of solute or solvent/ Total moles

Let's convert the mass to moles (mass / molar mass)

38.6 g / 342 g/m = 0.113 moles of sucrose

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Mole fraction of sucrose = Moles of sucrose / Total moles

0.113 m / 27.0613 moles = 4.09×10⁻³

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3 years ago
Our current model of a chemical bond is to think of it as an electrical interaction between what two parts of an atom
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Answer:

Explanation:

It involves the thinking of it as an electrical interaction between the positively charged part of an atom and the negatively charged part as well. Succinctly put, the interaction between the proton of an atom and the electron of an atom.

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Carbon naturally occurs in two forms: diamond and graphite. Why do these two forms have very different properties?
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5 0
3 years ago
Draw the structure of 2 methyl,but-3-ene
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Answer:

Please find the structure attached as an image

Explanation:

Based on the characteristics ending name (-ene) of the organic compound above, it belongs to the ALKENE GROUP. Alkenes are characterized by the possession of a carbon to carbon double bond (C=C) in their structure.

- But-3-ene tells us that the organic compound has four straight carbon atoms with the C=C (double bond) located on the THIRD carbon depending on if we count from right to left or vice versa.

- 2 methyl indicates that the methyl group (-CH3) is located as an attachment on the second carbon (carbon 2).

N.B: In the structure attached below, the counting is from the left to right (→).

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3 years ago
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