Biotechnology can be both useful and potentially destructive. Choose one example of biotechnology and identify whether it has had a positive or negative effect on society. Explain your answer.

Answers

Answer 1

Answer: I am not going to give you a full research report, but one example is DNA fingerprinting via gel electrophoresis. This has definitely had a positive effect on society, as it makes forensics a much more certain and just process. Gel electrophoresis can be used to separate and arrange DNA strands in order of length. You can then compare this arrangement to determine whether or not it matches another DNA arrangement. It has a very high accuracy rating, so you can be almost certain that if you have two electrophoresis results that look identical, that both DNA samples belong to the same person. This is compelling evidence that can either acquit or condemn suspects with certainty.

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An electron in a hydrogen atom moves from level 3 to level 1. In a second hydrogen atom, an electron drops from level 2 to level 1. Which statement describes the most likely result?The first atom emits light with more energy. The second atom emits light with more energy. The first and second atoms absorb energy without emitting light. The first and second atoms emit light with the same amount of energy.
A 0.20-Molar solution of K2CO3 is a better conductor of electricity than a 0.20-Molar solution of KBr. Which of the following BEST explains this observation between the two solutions. *

When converting an acid salt dissolved in water to its acid form, you are instructed to adjust the pH well into the acidic range (pH = ~2). Why don’t you just take the pH to neutral? You do the same for adjusting the pH of a solution containing an amine salt taking it well into the basic range rather than neutral. Why are you instructed to do this?

Answers

Answer:

The answer lays in logD.

Explanation:

So when you end up with neutral pH amine or either carboxylic acid can still be in a salt form. So for every compound the pH level of unionized form is different and for the best extraction experience is better to perform and extraction at as low as possible pH for acids and for amines as high as possible.

What element has the electron configuration 1s2 2s2 2p6 3s2 3p2?

Answers

The sulfur (S) element of the periodic table is represented by the electron configuration $1s^2 2s^2 2p^6 3s^2 3p^2$ .

The arrangement of electrons within the energy levels or orbitals of an atom is represented by electronic configuration. Sulfur has 16 electrons in its structure. The numbers in the electronic configuration represent the principal energy levels—1, 2, and 3—as well as the orbital—s or p—that the electrons are in.

Detail analysis of electron arrangement:

The first energy level (n = 1) represents the presence of two electrons in the symbol $1s^2$ 1s orbital.
The symbol $2s^2$ indicates the presence of two electrons in the second energy level (n = 2) and the 2s orbital.
The $2p^6$ symbol indicates the presence of 6 electrons in the second energy level (n = 2) and 2p orbitals.
The third energy level, or $3s^2$ , refers to the presence of two electrons in the 3s orbital (n = 3).
$3p^2$ stands for the third energy level (n = 3), and indicates that two of the three p orbitals hold two electrons.

When these electronic configurations are combined, the electron configuration of sulfur (S) is represented by $1s^2 2s^2 2p^6 3s^2 3p^2$ .

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Count the number of electrons = 2+2+6+2+2= 14

So, it must be SILICON.

A person makes a 400 dollar deposit in a bank account in January. By December, the value of that deposit willA. be three hundred dollars.
B. actually double.
C. remain the same, plus interest.
D. be two hundred dollars.

Answers

The amount in his bank account should grow because he will have accumulated some interest, even if the $400 stays the same, so this would be c.

The answer choice is B) It should actually double.

Considering it's been in the bank so long, it would have increased because of interest rates.

A chemist wants to calculate the amount of heat that is absorbed by a sample of copper as it is melted. Which constant should she use?

Answers

She needs to use the heat of fusion (ΔH(fusion)) and the equation q=mΔH(fusion) or q=nΔH(fusion) depending on whether or not ΔH(fusion) is given in J/g or J/mol. The reason why temperature is absent from the equation is that temperature does not change at a phase change, only the enthalpy does.

I hope his helps. Let me know in the comments if anything is unclear.

Answer:

Hfus

Explanation:

This is correct on edge.

Consider the
solubility curve at
right. Which
material is a
gaseous solute?

Answers

Answer:

Substance A

Explanation:

See attached worksheet,

The solubility of gasses decreases as temperature rises.

Which electron configuration represents the electrons in an atom of Ga in an excited state?

Answers

The ground state is the lowest energy state of an atom while the excited state is any state that is higher than the ground state. Since the ground state configuration of Ga is 2-8-18-3 then the electron configuration of Ga in an excited state is represented by 2-8-17-4. In order to achieve the excited state an electron has to be promoted.

Final answer:

An excited state electron configuration of Gallium (Ga) might be [Ar] 4s2 3d9 4p2, as this configuration represents an electron having absorbed energy and moved from the 3d to the 4p level.

Explanation:

The electron configuration of an atom in its ground state is the arrangement of electrons in the lowest possible energy levels (the 'normal' arrangement). For the element Gallium (Ga), the ground state electron configuration is [Ar] 4s2 3d10 4p1. However, when an atom is in an excited state, one or more electrons have absorbed energy and moved to a higher energy level. An electron configuration for an excited state of Gallium might look like [Ar] 4s2 3d9 4p2 as an electron from the 3d level has absorbed energy and moved to the higher 4p level.

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At what temperature will the following reaction happen spontaneously, given that ΔH=8.91×103J and ΔS= –219.20 J/K? CaSO4(s) + 2HCl(g) → CaCl2(s) + H2SO4(l)A) at 298 K B) at 100 K C) It is spontaneous at any temperature. D) It is not spontaneous at any temperature.

Lewis structures are used to represent ___.

True or false: the Precision of a calculated answer is limited by the least precise measurement used in the calculation

Need help with this equation! Can anybody lay out an answer please?Use this equation; 4Fe + 3O2 -> 2Fe2O3.If 96.0 grams of oxygen react, what mass of iron was oxidized? A.) 32.0 g B.) 96.0 g C.) 167 g D.) 223 gThanks!