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3 years ago

Rank the following dienes in order of increasing stability:

Chemistry

1 answer:

gavmur [86]3 years ago

6 0

Answer:

1,2-pentadiene < 1,4-pentadiene < cis-1,3-pentadiene < trans-1,3-pentadiene

Explanation:

1,3-pentadiene have two double bonds which are in conjugation, due to which delocalization occur. Delocalization of electrons more provide stability to 1,3-pentadiene as compared to 1,4-pentadiene and 1,2-pentadiene.

Among cis form and trans form of 1,3-pentadiene, trans form is more stable beacuse of less steric hindrance.

1,2-pentadiene is an example of cumulated diene. 1,4-pentadiene is an isolated diene. Cumulated dienes are less stable as two double bonds are present on the same carbon which leads to high electron density.

So, 1,2-pentadiene will be the least stable.

Order of dienes from least stable to most stable is as follows:

1,2-pentadiene < 1,4-pentadiene < cis-1,3-pentadiene < trans-1,3-pentadiene

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The genome map with details for gene 4 on chromosome 6 _____.

Monica [59]

<h3>Question :</h3>

The genome map with details for gene 4 on chromosome 6 _____.

is very complicated, medically important, and cannot be shared

like the rest of the genome, is still not complete and has not yet been published

due to criminal fraud, must be kept secret from both the general public and scientists

has been made available to both the scientific and private communities of the world

<h3>Answer :</h3>

The genome map with details for gene 4 on chromosome 6 <u>has been made available to both the scientific and private communities of the world</u><u>.</u>

So, correct option is 4th one.

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2 years ago

Test Name: GR8_Sci_U07_USA_FY20

kumpel [21]

The distance from the star to the Earth

Explanation:

The absolute brightness of a star is a measure of the intrinsec luminosity of the star, i.e. it does not depend on the distance of the star from the Earth.

In other word, the absolute brightness is a measure of the luminosity of a star if all stars were placed at the same distance from Earth.

On the other hand, the relative brightness of a star is a measure of its luminosity as observed on Earth, therefore it does depend on the distance of the star from the Earth: the farther the star is, the more its luminosity will decrease, and vice-versa.

The star's absolute brightness, therefore, depends only on the characteristics of the star itself, namely:

- The absolute magnitude of the star

- The rate at which the star produces energy via nuclear fusion

- The rate at which the star releases energy via electromagnetic radiation

Therefore, the only factor that does NOT change if the absolute brightness of a star changes is

- The distance from the star to the Earth

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brainly.com/question/2887352

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3 years ago

Random poitn drop , get it quickly

algol13

Answer:

THANK YOU

Explanation:

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3 years ago

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How many carbon dioxide molecules must be added to rubp to make a single molecule of glucose?

Pani-rosa [81]

Answer:

6 carbon dioxide molecules

Explanation:

The Calvin cycle generates the necessary reactions for the fixation of carbon in a solid structure for the formation of glucose and, in turn, regenerates the molecules for the continuation of the cycle.

The Calvin cycle is also known as the dark phase of photosynthesis or also called the carbon fixation phase. It is known as the dark phase because it is not light dependent as is the first phase or light phase .

This second stage of photosynthesis fixes the carbon of the absorbed carbon dioxide and generates the precise number of biochemical elements and processes necessary to produce sugar and recycle the remaining material for continuous production.

The Calvin cycle uses the energy produced in the light phase of photosynthesis to fix the carbon dioxide (CO2) carbon in a solid structure such as glucose, in order to generate energy.

The glucose molecule composed of a six-carbon main structure will be further processed in glycolysis for the preparatory phase of the Krebs cycle, both part of the cellular respiration.

The Calvin cycle produces in six turns a six-carbon glucose molecule and regenerates three RuBP that will be catalyzed again by the RuBisCo enzyme with CO2 molecules for the restart of the Calvin cycle.

The Calvin cycle requires six molecules of CO2, 18 ATP and 12 NADPH produced in the light phase of photosynthesis to produce a glucose molecule and regenerate three RuBP molecules.

7 0

3 years ago

How many micrograms (ug) are in 3.4 x 10^-5 ounces (oz)

marysya [2.9K]

Answer:

964ug

Explanation:

The problem here involves converting from one unit to another.

We are to convert from ounces to micrograms.

1ug = 1 x 10⁻⁶g

1oz = 28.35g

So we first convert to grams from oz then take to ug:

Solving:

1oz = 28.35g

3.4 x 10⁻⁵oz will then give 3.4 x 10⁻⁵ x 28.35 = 9.64 x 10⁻⁴g

So;

1 x 10⁻⁶g = 1ug

9.64 x 10⁻⁴g will give $\frac{9.64 x 10^{-4} }{1 x 10^{-6} }$ = 9.64 x 10²ug or 964ug

8 0

2 years ago