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Musya8 [376]
3 years ago
8

The reaction below virtually goes to completion because cyanide ion forms very stable complexes with Ni2+ ion:[Ni(H2O)6]2+(aq) +

4 CN-(aq) → [Ni(CN)4]2-(aq) + 6 H2O(l)At the same time, incorporation of 14C labelled cyanide ion (14CN-) is very rapid:[Ni(CN)4]2-(aq) + 4 14CN-(aq) = [Ni(14CN)4]2-(aq) + 4 CN-(aq)Which statement below is correct with regard to stability and rate of reaction?

Chemistry
1 answer:
NeX [460]3 years ago
6 0

Answer:

Option A and D are correct.

Unstable species react rapidly.

Stable species do not react rapidly.

Explanation:

The complete question is attached to this solution.

The more stable a reactant is, the less reactive it will be. A stable reactant has a very stable structure in which it will avoid any perturbations. And for a reaction to occur, the bonds in the reactant must break down to form the products. A stable reactant has very strong bonds that aren't easy to break down, hence, reactions involving very stable reactants do not proceed rapidly.

And the more unstable a reactant specie is, the more rapidly it reacts. This is why the reaction involving the less stable isotope of carbon; Carbon-14 is very rapid. It is the same reason as explained above that is responsible for this. The bond between unstable species are not strong and are easily breakable, thereby leading to a quick reaction.

Hope this Helps!!!

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notsponge [240]

Answer:

pH=3.38

Explanation:

We are given the concentrations of the weak acid and its conjugate base so we need to use the henderson hasslebalch equation

pH=pKa + log (concentration A-/concentration of HA)

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so if we plug in what we are given

pH= 3.08 + log (1M/.5M)

pH= 3.38

8 0
3 years ago
Increases in the amount of cytoplasmic calcium required to initiate a muscle contraction are mediated by the coupling between a
lesantik [10]

Answer:

1) Dihydropyridine receptor

2) Rynodine receptor

Explanation:

Rynodine receptor: It is a category of interacellular channels of calcium with different forms like neurons and muscles found in animal tissues.

Dihydropyridine receptor: they are present in muscle tissues and are able to sense voltage in skeleton muscles thus can increase or control the release of calcium.

4 0
3 years ago
1. What is the atmospheric layer responsible for long-distance radio communication?
eduard

Answer:

option D= Thermosphere

Explanation:

Thermosphere:

It is the layer of earth which is present above the mesosphere and below the exosphere. In therosphere photoionization of molecules is occur due  to U.V radiations and produce the ions in ionosphere.

Ionosphere:

It is present about 60 - 1,000 Km altitude of upper earth atmosphere and it is ionized part of atmosphere. It is present in thermosphere and parts of meso and exosphere. It is also called the extension of thermosphere. Although it is very small region but having great importance. Solar radiations ionized the ionosphere. It has many important role, for example in atmospheric electricity, creating the edge of magnetosphere and in radio communication to the long distance places of earth. The region present just below the ionosphere is termed as neutrosphere or neutral atmosphere.

Layers of ionization:

At the night significant ionization is occur in F layer but the ionization in D and E layer is not significant. In the day time too much heavy ionization is occur in D and E layer. The F layer create an other layer which called F1 and it is weaker ionization region. The ionization in F2 layer is occur day and night and this part is responsible for reflection and refraction of radio waves.

8 0
3 years ago
How many grams of water can be produced when 65.5 grams of sodium hydroxide reacts with excess sulfuric acid? Unbalanced equatio
kap26 [50]
The balanced reaction that describes the reaction between sulfuric and sodium hydroxide to produce sodium sulfate and water is expressed <span>H2SO4 + 2NaOH → 2H2O + Na2SO4. When 65.5 grams of sodium hydroxide reacts with excess sulfur, we need first to convert the mass to moles and multiply by stoich ratio 2/2 or 1. Hence the moles is multiplied to the molar mass of water. The final answer is 29.475 grams water.</span>
8 0
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san4es73 [151]

Answer:

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Lactose here acts as an inducer because it inactivates the repressor of an operon.

4 0
3 years ago
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