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nikklg [1K]
3 years ago
13

Identify a conjugate acid-base pair in the reaction

Chemistry
2 answers:
timurjin [86]3 years ago
5 0

Answer: it’s A

Explanation:

Just took the test

Marta_Voda [28]3 years ago
4 0

Answer:

The correct answer is option A.

Explanation:

According to the Bronsted-Lowry conjugate acid-base theory:

An acid is defined as a substance which looses donates protons and thus forming conjugate base and a base is defined as a substance which accepts protons and thus forming conjugate acid.

For the given chemical equation:

NH_3+H_2O\rightleftharpoons NH_4^{+}+OH^-

Here, H_2O is loosing a proton, thus it is considered as an acid and after losing a proton, it forms OH^- which is a conjugate base.

And, NH_3 is gaining a proton, thus it is considered as a base and after gaining a proton, it forms NH_4^{+} which is a conjugate acid.

Hence, the correct answer is option A.

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A 2.4L balloon filled with helium at room temperature 25oC is put into liquid nitrogen
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Answer:

V₂ = 0.62 L

Explanation:

Given data:

Initial volume = 2.4 L

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Final temperature = -196°C

Final volume = ?

Solution:

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Final temperature = -196°C ( -196+273 = 77 K)

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

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T₂ = Final temperature

Now we will put the values in formula.

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V₂ = V₁T₂/T₁  

V₂ = 2.4 L × 77 K / 298 k

V₂ = 184.8 L.K / 298 K

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Any point in the process leads to many possible next steps, and where that next step leads could be a surprise. For example, instead of leading to a conclusion about tectonic movement, testing an idea about plate tectonics could lead to an observation of an unexpected rock layer. And that rock layer could trigger an interest in marine extinctions, which could spark a question about the dinosaur extinction — which might take the investigator off in an entirely new direction. At first this process might seem overwhelming. Even within the scope of a single investigation, science may involve many different people engaged in all sorts of different activities in different orders and at different points in time — it is simply much more dynamic, flexible, unpredictable, and rich than many textbooks represent it as. But don't panic! The scientific process may be complex, but the details are less important than the big picture …

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