3 years ago

1. What causes shadows?

Chemistry

1 answer:

Lana71 [14]3 years ago

3 0

Please find the answers in attached file.

Hope they helps! :)

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The nose is an organ that acts as an airway for oxygen to enter the body. The nose also contains hairs that trap small foreign o

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A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the f

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Explanation:

Entropy means the amount of randomness present within the molecules of the body of a substance.

Relation between entropy and microstate is as follows.

S = $K_{b} \times ln \Omega$

where, S = entropy

$K_{b}$ = Boltzmann constant

$\Omega$ = number of microstates

This equation only holds good when the system is neither losing or gaining energy. And, in the given situation we assume that the system is neither gaining or losing energy.

Also, let us assume that $\Omega$ = 1, and $\Omega'$ = 0.833

Therefore, change in entropy will be calculated as follows.

$\Delta S = K_{b} \times ln \Omega' - K_{b} \times ln \Omega$

= $1.38 \times 10^{-23} \times ln(0.833) - 1.38 \times 10^{-23} \times \times ln(1)$

= $1.38 \times 10^{-23} \times (-0.182)$

= $-0.251 \times 10^{-23}$

or, = $-2.51 \times 10^{-24}$

Thus, we can conclude that the entropy change for a particle in the given system is $-2.51 \times 10^{-24}$ J/K particle.

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3 years ago

In creating a covalent bond, it would be best to bind oxygen to ______. carbon (C) argon (Ar) magnesium (Mg) aluminum (Al)

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Answer: In creating a covalent bond, it would be best to bind oxygen to carbon (C ).

Covalent bonds result from electron-sharing between two atoms. One carbon atom combines with two oxygen atoms. Thus, the carbon dioxide molecule has two C=O bonds. Carbon dioxide is a very common covalent bond.

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Dima020 [189]

Answer:

C) METALLIC IS THE CORRECT ANSWER

Explanation: I just did the exam

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