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zavuch27 [327]
3 years ago
13

Why do organisms evolve?

Chemistry
1 answer:
Mekhanik [1.2K]3 years ago
5 0

Answer:B

Explanation:

Natural Selection

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Answer: D: a volcano forming a new island in a chain

Explanation:

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3 years ago
Tertiary alkyl halides show SN1 reactions mostly...... Why?
ankoles [38]

Answer:

Generally SN1 reactions are carried out in polar protic solvents. The energy required for breaking the C-X bond is obtained through solvation of halide ion with the proton of the solvent. Tertiary alkyl halides undergo SN1 reaction very fast because of the high stability of tertiary carbocations.

6 0
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What are distinguishing features of animals? A) Generally an animal body exhibits a definite symmetry, form and shape. B) Growth
max2010maxim [7]

Answer:

A

Explanation:

5 0
2 years ago
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What is the difference between the low tide and the high tide
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6 0
3 years ago
A BaSO4 slurry is ingested before the gastrointestinal tract is x-rayed because it is opaque to x-rays and defines the contours
NNADVOKAT [17]

Explanation:

The given reaction equation is as follows.

         BaSO_{4}(s) \rightleftharpoons Ba^{2+}(aq) + SO_{4}^{2-}(aq)

The value of \Delta G^{o} = 59.1 kJ/mol

We know that ,

            \Delta G^{o} = -RT ln K_{sp}

 or,       ln K_{sp} = -(\frac{\Delta G^{o}}{RT})


                       = -(\frac{59.1 kJ/mol}{(8.314 \times 10^{-3} kJ/mol.K \times 310 K))}[/tex]  

            = -22.93

or,      K_{sp} = e^{-22.93}

                      = 1.1 \times 10^{-10}

      K_{sp} = [Ba^{2+}][ SO_{4}^{2-}]

Therefore,      [Ba^{2+}] =\sqrt{K_{sp}}

                                        = \sqrt{ 1.1 \times 10^{-10}}

                                         = 1.05 \times 10^{-5} M

Therefore, we can conclude that the value of [Ba^{2+}] in the intestinal tract is 1.05 \times 10^{-5} M.

7 0
3 years ago
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