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nirvana33 [79]
3 years ago
6

Which of these cities has the least change in seasons during the year

Biology
1 answer:
iren [92.7K]3 years ago
7 0
What are the names of the cities?

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A certain first-order reaction a → b is 25% complete in 42 min at 25°c. What is the half-life of the reaction?
yan [13]

Answer:

t_{\frac{1}{2}} = 101.16 minutes

Explanation:

For a First order reaction, the rate constant is determined by

k = \frac{2.303}{t} log \frac{a}{a-x}

Where

k= rate constant

t= time required for a reaction

a= initial concentration

x= amount of reactant decomposed in time t

a-x= amount of reactant left after time t

Let the initial concentration be 100

Then

x = 25\\a-x = 75

Substituting the given values in above equation, we get -

k = \frac{2.303}{42} log \frac{100}{75} \\

k = 6.85 *10^{-3}

Also,

k = \frac{0.693}{t_{\frac{1}{2}} } \\t_{\frac{1}{2}} = \frac{0.693}{6.85 *10^{-3}}\\

t_{\frac{1}{2}} = 101.16 minutes

Read more on Brainly.in - https://brainly.in/question/6804668#readmore

7 0
4 years ago
When two amino acids combine and the carboxyl group of the first amino acid reacts with the amino group of the second amino acid
Paul [167]
<span>When two amino acids combine and the carboxyl group of the first amino acid reacts with the amino group of the second amino acid, the end product of this combination is <span>A di-peptide and water. 

</span></span><span>The linking of two amino acids is accompanied by the loss of a water molecule.
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Pls. see attachment for the image of the peptide-bond formation. 
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8 0
3 years ago
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: Why will salt form a solution with water but sand will not?
Makovka662 [10]

Answer:

Explanation:

Salt is soluble, meaning it can dissolve in water, while sand is not

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3 years ago
In animal cells the mitochondrial electron transport chain is responsible for reoxidizing most of the nadh produced by oxidative
notsponge [240]

The answer is TRUE. Oxidative phosphorylation is usually a redox reaction in which energy is released and used to form ATP from ADP and Pi. Oxygen is the main electron acceptor.  In eukaryotes, these redox reactions are carried out by a series of protein complexes (electron transport chain) within the inner membrane of the cell's mitochondria. NADH dehydrogenase or complex I is the first protein in the electron transport chain. The reaction that is catalyzed by this enzyme is the two electron oxidation of NADH by coenzyme Q10 or ubiquinone.






8 0
3 years ago
How could you revise this statement to be more complete or correct?
Luden [163]

Answer:

What is the statement?

Explanation:

6 0
3 years ago
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