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masha68 [24]
3 years ago
12

If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true?

Chemistry
1 answer:
nikdorinn [45]3 years ago
6 0

Answer:

C???

Explanation:

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What is the half-life for the first order decay of 14C according to the reaction, 146C — 147N +e- ?
m_a_m_a [10]

Answer:

5727 years or 5730 (rounded to match 3 sig figs) whichever one your teacher prefers

Explanation:

First Order decay has a half life formula of Half Life = Ln (2) / k = 0.693/K

Half-life = 0.693/k = 0.693/1.21 x10-4 =  5727 years or 5730 (rounded to match 3 sig figs)

This should be correct because if you google the half-life of 14 C it is ~ 5700 years

8 0
3 years ago
Which reaction takes place in a nuclear fission reactor?
Arlecino [84]

Answer:

Chain reaction

Explanation:

A chain reaction is a process by which neutrons that have been released in a first nuclear fission produce an additional fission in at least one more nucleus. This atomic nucleus fishes and releases more neutrons, giving the opportunity to repeat the process.

Nuclear fission is the physical-chemical reaction through which the nucleus of an atom is split. In the main interest of fission reactions is that through this operation a large amount of energy is obtained. According to the definition of nuclear energy, atomic energy is the energy contained in the nucleus of an atom and the energy obtained is thermal energy, energy in the form of heat.

The other form of exploitation is through nuclear fusion reactions. In this case, the process is reverse, merging two different nuclei forming a single atomic nucleus.

After fission of the atomic nucleus we obtain various fragments with a mass almost equal to half of the original mass plus two or three neutrons. It is remarkable the release of these two or three neutrons because they are what will allow a new reaction in another atom.

8 0
3 years ago
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A substance which contains various elements or compounds without bonding or in fixed proportions is a(n) _____.
julia-pushkina [17]
The correct answer that would best complete the given statement above would be the word MIXTURE. <span>A substance which contains various elements or compounds without bonding or in fixed proportions is a mixture. When a chemical union occurs, this is when a compound is being formed. Hope this answer helps.</span>
5 0
3 years ago
A.1 B.2 C.3 D.4 Please help!
VashaNatasha [74]
I think its 3 precipitation.
6 0
3 years ago
Read 2 more answers
0.0045 x 0.000789 sig fig
lesantik [10]

Answer:

The answer IS 0.0000035505. Hope it helps!

Explanation:

8 0
4 years ago
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