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Korolek [52]
2 years ago
9

How does water help cells keep an even temperature despite temperature changes in

Chemistry
1 answer:
Virty [35]2 years ago
6 0
Water has high specific heat. So its temperature will not easy to change. Then can help cells keep an even temperature despite temperature changes in the environment.
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The decomposition of hydrogen peroxide follows first order kinetics and has a rate constant of 2.54 x 10-4 s-1 at a certain temp
pav-90 [236]

<u>Answer:</u> The initial concentration of hydrogen peroxide at the given temperature is 0.399 M

<u>Explanation:</u>

Decomposition of hydrogen peroxide is following first order kinetics.

Rate law expression for first order kinetics is given by the equation:

k=\frac{2.303}{t}\log\frac{[A_o]}{[A]}

where,  

k = rate constant = 2.54\times 10^{-4}s^{-1}

t = time taken for decay process = 855 s

[A_o] = initial amount of the reactant = ?

[A] = amount left after decay process =  0.321 M

Putting values in above equation, we get:

2.54\times 10^{-4}s^{-1}=\frac{2.303}{855s}\log \frac{[A_o]}{0.321}

[A_o]=0.399M

Hence, the initial concentration of hydrogen peroxide at the given temperature is 0.399 M

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3 years ago
Alkenes can be converted to alcohols by reaction with mercuric acetate to form a ?-hydroxyalkylmercury(II) acetate compound, a r
Goshia [24]

Answer:

The simplified mechanism and products are on the picture.

Explanation:

If we have the symmetrical alkene the addition of mercury and OH group is not regioselective but when we have more donors for one of Carbons in alkene then the OH group will go there.

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3 years ago
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What is the objective of sustainable development? Sustainable development is concerned with meeting needs without jeopardizing t
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Answer:

To meet the needs of the present without jeopardizing that of the future.

Explanation:

Sustainable development applies to all faculties of resource allocation. Most available resources are limited in their capacity to satisfy our limited human wants.

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  • Conservation of resources is an approach towards sustainable development.
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3 years ago
Energy produced by the sun and stars comes from
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Answer:

It's heat energy

Explanation:

which is transmitted through radiation.  The sun warms us.

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2 years ago
The most common physical state of the elements is
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Answer:

Solids.

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3 years ago
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