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1 year ago

Step 4: Summarize nuclear changes.

Chemistry

1 answer:

zavuch27 [327]1 year ago

6 0

Nuclear changes involves changes in the composition of the nucleus of atoms with the release of large amounts of energy.

<h3>What are nuclear changes?</h3>

Nuclear changes are changes which occur in the nucleus of atoms of elements.

Nuclear changes involves radioactive decays to give radiation and energy spontaneously known as radioactivity.

In this type of nuclear change no energy is required to start the reaction but large amount of energy are released.

Nuclear changes can also involve splitting of large nucleus into smaller nucleus of atoms known as nuclear fission or the formation of larger nucleus from the combination of two or more smaller nuclei known as nuclear fusion.

Energy is required to start nuclear fission and fusion but the energy released is far greater.

When compared with energy changes in chemical reactions, the energy released in nuclear reactions is far greater.

Therefore, nuclear changes involves changes in the composition of the nucleus of atoms with the release of large amounts of energy.

Learn more about nuclear changes at: brainly.com/question/25819143

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3 years ago

Burning one gallon of gasoline releases 20 pounds of CO2 into the air. Harry’s compact car can travel 25 miles on one gallon of

son4ous [18]

There are several information's already given in the question. Based on those information's, the answer can be easily deduced.
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2 years ago

The AE of a system that releases 12.4 J of heat and does 4.2 J of work on its surroundings It is_______ jA. 16.6 B. 12.4 C. 4.2

andre [41]

ANSWER

EXPLANATION

Given that

The energy released by the system is 12.4J

Work done on the surrounding is 4.2J

Follow the steps below to find the change in energy

In the given data, energy is said to be released to the surroundings

Recall, that exothermic reaction is a type of reaction in which heat is released to the surroundings. Hence, change in enthalpy is negative

Step 1; Write the formula for calculating change in energy

$\Delta E\text{ }=\text{ q }+\text{ w}$

Since heat is released to the surrounding, then q = -12J

Recall, that work done by the system on the surroundings is always negative

Hence, w = -4.2J

Step 2; Substitute the given data into the formula in step 1

$\begin{gathered} \text{ }\Delta E\text{ = q + w} \\ \text{ }\Delta E\text{ }=\text{ -12.4 }+\text{ \lparen-4.2\rparen} \\ \text{ }\Delta E\text{ = -12.4 - 4.2} \\ \text{ }\Delta E\text{ }=\text{ -16.6J} \end{gathered}$

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1 year ago

12.

Veronika [31]

Answer:

Nonbonding pairs of electrons.

Explanation:

Both oxygen atoms in the diatomic molecule have two nonbonding pairs. This results in the oxygen molecule having a planar geometric shape. This is because nonbonding pairs repel each other are significant in determining the shape of a molecule.

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3 years ago

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