When two carbon atoms are joined by a double bond, how many electron pairs are shared between the two carbons

Answers

Answer 1

Answer:

Two (2) electron pairs

Explanation:

The sharing of electron pairs by atoms forms a type of bond called COVALENT bond. Atoms that form covalent bonding (share electrons) do so in order to fill their outermost electron shells, hence, gain chemical stability.

However, when two atoms like carbon share TWO PAIRS of electrons with each other, a DOUBLE BOND is formed. An example is the double bond formed in Ethylene (2HC=CH2). A total of four valence electrons (a pair from each carbon) are shared between the two carbon atoms.


Related Questions

This questions has been a headaching me for a while. Please if anyone knows this answers?!

Answers

Answer:

1

Explanation:

1 represents the element, Hydrogen

It has 1 shell/electron

Because hydrogen has only the one electron/shell, it can also lose that electron/shell to form a completely empty n = 1 shell.

Which statement describes the relationship between thermal energy and particle movement?

Answers

Answer: The options are not given, here are the options.

A)There is an indirect relationship: as thermal energy increases, there is more particle movement.

B) There is an indirect relationship: as thermal energy increases, there is less particle movement.

c) There is a direct relationship: as thermal energy increases, there is more particle movement.*****

d) There is a direct relationship: as thermal energy increases, there is less particle movement.

The correct option is C.

There is a direct relationship: as thermal energy increases, there is more particle movement.*****

Explanation:

There is a direct relationship: as thermal energy increases, there is more particle movement because when there is increase in thermal energy or heat in a substance, the particles start to vibrate and move faster as a result of the particles gaining kinetic energy which is as a result of increased collision and diffussion rates.

As they vibrate the space between the particles increases which result in increase in motion or movement of the particle

In a controlled experiment, a scientist is studying how long it takes parachutes of different sizes to fall to the ground. What is the experimental variable?

Answers

The controlled variable would be the weight and time it'll take for the parachutes to land.The uncontrolled variable is the wind and the amount of resistance.

What does intrinsic mean in science

Answers

An intrinsic property is independent of how much of a material is present and is independent of the form of the material, one large piece or a collection of small particles. Intrinsic properties are dependent mainly on the fundamental chemical composition and structure of the material.

List at least three scientific disciplines related to chemistry mentioned or alluded to in the article. The Ozone Hole

Answers

Answer: biology, climate Science, astronomy etc.

Explanation:

The scientific disciplines that are related to chemistry mentioned or alluded to in the article are:

• Biology: Biology is a natural science which studies living organisms, and this include their molecular interactions, evolution, physical structure, and chemical processes.

• Astronomy: Astronomy is the study of space, and the universe. In astronomy, the stars, planets, and galaxies are all studied.

• Climate science: Climate science is also referred to as climatology and it's the scientific study of climate.

Answer:

1. Atmospheric science, environmental science, climate science, biology, astronomy, human physiology and medicine

Explanation:

Because I said so

if a bar of motilium cost .0.2 dollars how much will 200 bars cost

Answers

Answer: 40

Explanation: 0.2 x 200

Can anyone give me examples of control groups ?

Answers

Answer:

In an experiment in which blood pressure medication is tested, one group is given the blood pressure medication while the control group is given a placebo pill.

In a test of anxiety treatment, one group attends individual therapy sessions and receives a new medication. The control group receives only an inert pill.

A treatment for drug addiction is being tested. A group of meth addicts are given the treatment while the control group is given the placebo.

Researchers are testing the effectiveness of a drug intended to reduce symptoms of Crohn's disease. Many sufferers of Crohn's disease are recruited for the effort and the group that receives the placebo is the control group.

A treatment for hair loss in men is being tested. Men of the same age range are gathered. One group receives an application with the active ingredient while the control group receives an application that appears the same but does not have the active ingredient in it.

hope this helped you

Four properties of water are listed. It reacts with halogens to form oxygen gas as one of the products. It is transparent and tasteless in its pure form. It freezes at a temperature of 0 °C and lower. It decomposes to form hydrogen and oxygen. Which are the chemical properties of water?

Answers

Answer:

1 and 4 took the test

Explanation:

What is limitation of using marbles as models for atoms

Answers

Explanation:

I think it really depends on what you are using them for but I would say in general that using marbles means you can't investigate the subatomic particles (electron orbitals, nucleus etc.) and also you can't exactly model atomic binding with marbles as they don't really stick together.

I would say those are the two main things but once again really depends on what they're being used for.

Hope this helped!

What is Heat?
Can someone answer this for me?

Answers

a form of energy and temperature measures how much energy an object has. the faster the molecules move the hotter the temperature because there’s more energy.

Which example is NOT a model?
A)
foam planets
B)
plastic skeleton
atom made of fruit
D
skin cells**

Answers

Answer:

B

Explanation:

i think leter B it because

Plastic skeleton atom made of fruit

can you determine the contents of the unlabeled jar through observation alone?

Answers

Answer:

This question appears incomplete but generally the answer is NO

Explanation:

Observation of the contents of an unlabeled jar depends solely on some of the physical properties of the content which is not good enough when identifying the contents of an unlabeled jar. This is because several substances have the same physical properties. For example, water and several acidic solutions appear the same in terms of colour and viscosity. Hence, a jar of water and a jar of hydrochloric acid cannot be differentiated by mere observation but with the use of litmus paper.

And a solution of hydrochloric acid and sulphuric acid cannot be differentiated by observation alone except a jar ammonia is brought close to the two jars (the one with hydrochloric acid will form a white fume with ammonia); hence relying on the chemical properties of both substances.

NOTE: Observation is done through sight, smell, feel, sound and taste without relying on another procedure/analysis to determine them.

1. In which state of matter can the particles move fast freely? 2. In which state of matter are the particles closet together? 3. Sketch a simple diagram to compare the arrangement of the particles in 1 and 2.

Answers

Answer:

1. The particles move freely in gaseous forms.

2. They are closest in the solid form.

3 SOLID

 - They are very closed with each other and are mostly non-living things and hard things.

-They are very hard to break

-Examples Table, chair etc

Gaseous

-They are very freely and are not packed

-They are mostly in gas and are in many forms.

- Examples : Hydrogen, Oxygen etc

Which statement would BEST describe the diagram ?

Answers

It is the first answer because 800 N is stronger than 400 N so the car will go to the right.


If the amount of gas and temperature are constant and you double the volume of the gas,

Answers

Explanation:

pressure decrease and collision decreases

For water, the value for the latent heat of vaporization is 6.8 times greater than the latent heat of fusion. Imagine we were adding heat at a constant rate to a block of ice in a beaker on a hot plate, and it took 4 minutes for the ice to melt completely. How long would it take, after the water started boiling, for the beaker to be completely empty (the liquid water totally converted to water vapor)?

Answers

Answer:

Time of vaporization = 0.588 minutes

Explanation:

The latent heat of fusion is the heat required to change the substance from solid (ice) to liquid completely, without further increase in temperature.

The latent heat of vaporization is the heat required to change a liquid to gas completely, without an increase in temperature.

Latent heat of vaporization = 6.8 times Latent heat of fusion

This means that the time it takes for the latent heat of vaporization to complete vaporization is 6.8 times lesser than the time it takes for the latent heat of fusion to complete fusion

Time of vaporization = 6.8 times lesser than time of fusion

Time of vaporization = (time of fusion) ÷ 6.8

where: Time of fusion = 4 minutes

∴ Time of vaporization = 4 ÷ 6.8

Time of vaporization = 0.588 minutes

What are the fields of science??

Answers

Answer:

Life science is alternatively known as biology, and physical science is subdivided into branches: physics, chemistry, astronomy and Earth science. These branches of natural science may be further divided into more specialized branches. But that is more writting to explain

Explanation:

my car is 10.4 feet long. how many inches is that​

Answers

Answer:

124.8 inches

Explanation:

124.8 inches! Hope this helped! :D

Scientific Notation - PLEASE HELP!

Answers

?= 79.5

Hope this can help.
79.5 • 10^6 = 79500000

7. A gas has a volume of 300 mL at 300 mm Hg. What will its volume be if the pressure is changed to 500 mm Hg?​

Answers

Answer:

The volume is

180 mL

Explanation:

In order to solve for the volume we use the formula for Boyle's law which is

[tex]P _{1} V _{1} = P _{2}V _{2}[/tex]

where

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Since we are finding the final volume we are finding V2

Making V2 the subject we have

[tex]V _{2} = \frac{P _{1} V _{1}}{P _{2} } [/tex]

From the question

P1 = 300 mmHg

V1 = 300 mL

P2 = 500 mmHg

Substitute the values into the above formula and solve for the final volume obtained

That's

[tex]V _{2} = \frac{300 \times 300}{500} \\ = \frac{90000}{500} \\ = \frac{900}{5} [/tex]

We have the final answer as

180 mL

Hope this helps you

The main factor which effects the speed of a sound wave is the ____

Answers

Answer:

it depends on the medium and the temperature

Explanation:

The speed of the sound wave has been majorly dependent on temperature and medium of propagation.

Speed can be defined as the distance traveled by the wave in a unit of time. The speed is a scalar quantity and has been independent of the direction.

The speed has been dependent on the medium of propagation of the wave, The transmission has been the transfer of sound energy, the medium with compact structure has been consisted of the higher speed with the medium having distinct particles.

The speed is also dependent on the temperature as the higher temperature has fast vibrating molecules and higher speed, while lower temperature has slow-moving molecules and lesser speed.

The speed of the sound wave has been majorly dependent on temperature and medium of propagation.

For more information about the speed of the sound wave, refer to the link:

https://brainly.com/question/15685413

Intermolecular forces are responsible for which of the following. Select all that apply. Question 5 options: A) Boiling points B) Melting points C) Solubility D) Phase (solid, liquid, gas) at room temperature E) None of the choices are applicable

Answers

Answer:

A) Boiling points

B) Melting points

D) Phase (solid, liquid, gas) at room temperature

Explanation:

Intermolecular forces are attractive forces between molecules. Generally, intermolecular forces are much weaker than intramolecular forces.

All substances exist in one of three states: gas, liquid, or solid. The major difference between the condensed state and the gaseous state is the distance separating molecules.

The boiling points of substances often reflect the strength of the intermolecular forces operating among the molecules. At the boiling point, enough energy must be supplied to overcome the attractive forces among molecules before they can enter the vapor phase. If it takes more energy to separate molecules of substance A than of substance B because A molecules are held together by stronger intermolecular forces, then the boiling point of A is higher than that of B. The same principle applies also to the melting points of the substances. In general, the melting points of substances increase with the strength of the intermolecular forces.

How many moles are in 2.3 grams of phosphorus? :(

Answers

Answer:

there are 0.074 moles in 2.3 grams of phosphorus

What Is Matter? Someone help me plzzz

Answers

Answer:

matter is anything with mass and volume

How do the densities of the two objects compare?

Answers

Compare the density of the object in question to the density of water. If its density is less than water, it will float. For example, oak floats because its density is 0.7 g/cm³. If the density of an object is greater than water, it will sink.

The image shows particles of salt dissolved in water.
How will the arrangement of salt particles most likely
change?
Salt particles will move toward the left through
diffusion.
Salt particles will move toward the left through active
transport.
Salt particles will move toward the right through
diffusion.
O Salt particles will move toward the right through active HELP PLEASE IM TIMEd!!!
transport.

Answers

Answer:

left through diffusion!

Explanation:

Salt particles will diffuse and towards where it is less.

Answer:

left through diffusion

Explanation:

is marble a compound or element?​

Answers

Answer:

compound

Explanation:

"Marble is typically more than 95% calcium carbonate, perhaps even 99% calcium carbonate, and calcium carbonate is a compound. Marble has a good claim to be recognized as a compound."

Answer: Element

Explanation: No, marble is not a compound, because for a rock to be called marble other characteristics, beyond the chemical composition, have to have specific values. But marble is made up of only one compound, calcium carbonate. Colored marbles do contain small amounts of other chemicals.

c. What is the volume of a rock that has a mass of 75.4 grams and
a density of 3.45g/cm??

Answers

Answer:

75.4 gram /3.45 gram/cubic centimeter  = 21.855072463768 cubic centimeter

Explanation:

V =   m /ρ

where V = Volume, p = Density  and m = Mass

When the problem within the story gets more intense and builds, this is the... Select one: climax. falling action. rising action. resolution.

Answers

Answer:

rising action.

Explanation:

Rising action is a term used in literature to describe the corresponding portion of the story, that occurs immediately before the climax, by increasing its atmosphere or builds-up whereby the tension level surges.

Climax, on the other hand, is a form of the highest point major turning point in a story.

While falling action is the point where there is a quick decrease in tension level, and follows immediately after the climax

Resolution is also known as the final part of the story, it follows immediately after falling action.

Hence, when the problem within the story gets more intense and builds, this is the "Rising Action."

please help me out with this ​

Answers

1- 50.4
2- 13.24
3- 16.18
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