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Nata [24]
3 years ago
6

As NH4Cl dissolves in water, and cools the solution,

Chemistry
1 answer:
azamat3 years ago
5 0

Answer:

d. delta H is positive, and delta S is positive

Explanation:

The process of dissolution of NH4Cl is:

NH4Cl(s) → NH4+(aq) + Cl-(aq)

As the solution is cooled, the process is absorbing energy, that means ΔH > 0. (ΔH < 0 when the heat is released).

As there are produced 2 ions from 1 solid molecule, the disorder is increasing and ΔS > 0

The right answer is:

<h3>d. delta H is positive, and delta S is positive</h3>
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Answer:

Environment A is not undergoing succession, and Environment B is.

Explanation:

Ecological succession is a gradual process in which ecosystems significantly change over time. Ecological succession is a term used by scientists to describe the change in the structure of a community of different species, or ecosystem. This concept of ecological succession stems from a desire to understand the patterns of change in large and complex ecosystems like forests and how they can exist in places known to be recently formed, such as volcanic islands.

In environment A, the ecosystem is not really changing, organisms are merely returning to their natural habitat. It does not represent any change in the ecosystem.

In environment B, the original ecosystem has become grossly modified, first by the appearance of lichen and mosses and subsequently by grasses shrubs and animals. These sequence of events correlate well with the idea of ecological succession presented in the opening paragraph hence environment B is undergoing ecological succession.

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True or False. A force is a push or pull exerted on an object.
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Answer:

TRUE

Explanation:

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In parallel circuits, ______ follow down ______ paths.
masya89 [10]

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Electrons follow multiple paths in a parallel circuit.

Explanation:

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How do you use the changes in the phase of water to keep you cool?
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Solid aluminum metal reacts with aqueous zinc chloride to produce solid zinc metal and aqueous aluminum chloride
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Answer:

2Al + 3ZnCl₂    →    3Zn + 2AlCl₃

Explanation:

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Al + ZnCl₂    →    Zn + AlCl₃

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2Al + 3ZnCl₂    →    3Zn + 2AlCl₃

This is the example of single displacement reaction. Al displace the zinc and form aluminium chloride and zinc metal.

There are two Al three zinc and six chlorine atoms on both side of equation so it is correctly balanced.

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According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

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