Carbon dioxide has a very low boiling point. Explain why.

QUESTION POSTED AT 12/02/2020 - 04:00 PM

Answered by admin AT 12/02/2020 - 04:00 PM

Because it has very weak intermolecular meaning it takes little energy to break them and turn it into a gas
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Related questions

According to recent research, ice skaters are able to glide smoothly across the ice because A. ice is constantly subliming to form a layer of water vapor B. a thin, liquid-like layer of water covers the ice C. pressure from the skates raises the melting point of ice D. pressure from the skates lowers the melting point of ice

Answer:

B. A thin, liquid-like layer of water covers the ice

Explanation:

Hello,

Ice skaters are able to glide smoothly across the ice because a thin, liquid-like layer of water covers the ice, this is achieved due to the environmental conditions which allow the liquid water layer to coexist with the ice. Due to this fact, the liquid-like layer diminishes the friction coefficient between the ice skateboard and the ice allowing the slip to be carried out smoothly.

Best regards.

ANSWERED AT 28/02/2020 - 05:05 PM


QUESTION POSTED AT 28/02/2020 - 05:05 PM

What happens to the temperature of water between the time ice melts and water boils (this is partially quoted from a question)? Also, what change occurs in temperature after water starts boiling (this is also from a booklet)? Thank you and please explain your thoughts. This is based on the phase changes of water, and you should refer to a graph on the phase changes of water.

Your first statement is very ambiguous so I will give it the best shot as to what you are saying.
The temperature, between the point of ice melting and water boiling, is increasing as water is in its liquid state.
Now during a phase change, or while the water is boiling, the temperature remains constant because the energy being added is being consumed to complete the phase change.
But if you're looking at the phase change graph, the points of positive slopes, are moments when energy is increasing as the water, in whatever state, is increasing. But when the slope of the graph is 0, the water is changing phases and the temperature remains constant! I hope I explained that so you could understand it, and I hope this helps you!

ANSWERED AT 28/02/2020 - 03:47 PM


QUESTION POSTED AT 28/02/2020 - 03:47 PM

Discuss, in detail, three things that we can learn from fossils. (15 points)

What used to exist before humans.
Years and age of whatever the fossils may be
I'm not sure about the other sorry :(

ANSWERED AT 28/02/2020 - 03:33 PM


QUESTION POSTED AT 28/02/2020 - 03:33 PM

What kind of instrument is this and explain the details what it measures

I believe it measures the pressure in the atmosphere. Not positive on the name...barometric pressure gauge? 

ANSWERED AT 28/02/2020 - 03:27 PM


QUESTION POSTED AT 28/02/2020 - 03:27 PM

What is the empirical formula for a compound that is a 83.7% carbon and 16.3% hydrogen

The empirical formula for a compound that is a 83.7% carbon and 16.3% hydrogen is CH2

ANSWERED AT 28/02/2020 - 03:23 PM


QUESTION POSTED AT 28/02/2020 - 03:23 PM

Explain why neptune cannot be seen without a telescope

Because it's to little

ANSWERED AT 28/02/2020 - 02:50 PM


QUESTION POSTED AT 28/02/2020 - 02:50 PM

How does a change in medium affect light?BTW, If you have any extra questions ask for details, don't steal points please.

The speed of light changes as it passes from one medium to another medium due to the difference in the density of the two media. This is the reason for refraction of light also.

ANSWERED AT 28/02/2020 - 02:41 PM


QUESTION POSTED AT 28/02/2020 - 02:41 PM

What is process of bringing water to boiling affects

Boiling is the rapid vaporization of a liquid, which occurs when a liquid is heated to its boiling point, the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere. There are two main types of boiling; nucleate boiling where small bubbles of vapour form at discrete points, and critical heat flux boiling where the boiling surface is heated above a certain critical temperature and a film of vapor forms on the surface. Transition boiling is an intermediate, unstable form of boiling with elements of both types. The boiling point of water is 100 °C or 212 °F, but is lower with the decreased atmospheric pressure found at higher altitudes.

Boiling water is used as a method of making it potable by killing microbes that may be present. The sensitivity of different micro-organisms to heat varies, but if water is held at 70 °C (158 °F) for ten minutes, many organisms are killed, but some are more resistant to heat and require one minute at the boiling point of water. Clostridium spores can survive this treatment, but as the infection caused by this microbe is not water-borne, this is not a problem.

Boiling is also used in cooking. Foods suitable for boiling include vegetables, starchy foods such as rice, noodles and potatoes, eggs, meats, sauces, stocks and soups. As a cooking method it is simple and suitable for large scale cookery. Tough meats or poultry can be given a long, slow cooking and a nutritious stock is produced. Disadvantages include loss of water-soluble vitamins and minerals. Commercially prepared foodstuffs are sometimes packed in polythene sachets and sold as "boil-in-the-bag" products.


ANSWERED AT 28/02/2020 - 02:15 PM


QUESTION POSTED AT 28/02/2020 - 02:15 PM

Which molecule is polar, based on structure? sulfur dioxide carbon disulphide ethylene carbon tetrachloride

Answer:  Sulphur Dioxide

Explanation:  Polarity of the molecule is basically based on -

a) Electro negativity of the individual atoms

b) Structure of the molecule as change will dipole moment or asymmetric structure will lead to the polar molecule.

Sulfur Dioxide has bent structure with 2 lone pairs and 2 bond pairs. . Thus the molecule is polar

Carbon disulfide has linear structure. Thus there will be no change in dipole moment in the structure thus in non polar.

Ethylene molecule is the most linear molecule thus cannot be polar.

Carbon Tetra chloride is in shape of Tetrahedron thus it is also non polar as no net change in dipole moment can be seen.

ANSWERED AT 28/02/2020 - 02:07 PM


QUESTION POSTED AT 28/02/2020 - 02:07 PM

When 10g of calcium carbonate is heated,4.4g of carbon dioxide escape out. The amount of residue left is:

The dissociation of calcium carbonate, CaCO3, to simpler compounds can be expressed as,
                        CaCO3 --> CaO + CO2
The precipitate is CaO and its amount is calculated through the difference which will give us the answer of 5.6 g. 

ANSWERED AT 28/02/2020 - 01:38 PM


QUESTION POSTED AT 28/02/2020 - 01:38 PM

What is the difence between high pressure and low pressure?

High pressure systems circulate clockwise. These "motions" (caused by these circulations) are the building blocks in our atmosphere. They give us our weather. A Low's counter-clockwise circulation forces air upward (ultimately resulting in condensation, cloud formation and ultimately precipitation).

ANSWERED AT 28/02/2020 - 01:35 PM


QUESTION POSTED AT 28/02/2020 - 01:35 PM

Is ethanol hydrophilic or hydrophobic? Explain.

The other end contains an -OH group that can form hydrogen bonds to neighboring water molecules and is therefore said to be hydrophilic (literally, "water-loving"). ... One end of this alcohol molecule is nonpolar, and therefore hydrophobic. The other end is polar, and therefore hydrophilic.
Copy and paste this for more information: 
chemed.chem.purdue.edu/genchem/topicreview/bp/ch15/solut.php

ANSWERED AT 28/02/2020 - 12:51 PM


QUESTION POSTED AT 28/02/2020 - 12:51 PM

What is the difference between a mixture and a compound? (need an easy two sentence answer (able to explain it to a 8 your old).)

 A mixture is made from two or more substances that are chemically unlike and are not chemically joined. A compound is a substance formed when two or more elements chemically react with each other to ... substances because no new substance is formed, therefore they do not have any fixed properties.

ANSWERED AT 28/02/2020 - 12:02 PM


QUESTION POSTED AT 28/02/2020 - 12:02 PM

Explain the process of separating a mixture consisting of iron fillings and sand in a plastic bowl.

Answer: To separate the iron sand mixture we will use a magnet to get rid of the iron filings from the sand as a result of sand isn't drawn to the magnet. once separation, the elements of the mixture can have the identical composition and properties as they didn't begin with. Hence , magnet can be used for seprating a mixture of iron fillings and sand .

ANSWERED AT 28/02/2020 - 11:51 AM


QUESTION POSTED AT 28/02/2020 - 11:51 AM

Which of the following is a chemical change? A. melting ice B. boiling water C. burning candle D. frost forming inside of a freezer

Answer to this question is c. burning candle. the rest of the choices are phase changes

ANSWERED AT 28/02/2020 - 11:44 AM


QUESTION POSTED AT 28/02/2020 - 11:44 AM

A sample of water is mixed with a surfactant. What will most likely happen to the viscosity of the water? Explain your answer.

--The viscosity of the water will decrease.

--Surfactants disrupt intermolecular forces within a liquid.

--Viscosity is directly related to intermolecular forces.

--If intermolecular forces are decreased, viscosity should also decrease.

ANSWERED AT 28/02/2020 - 11:23 AM


QUESTION POSTED AT 28/02/2020 - 11:23 AM

The forces between water molecules are stronger than the forces between ethanol molecules. Which liquid would probably be most difficult for an insect to walk on? Explain your answer.

An insect would have an easier time walking on the surface of water than on the surface of ethanol. Water's stronger intermolecular forces lead to higher surface tension. Higher surface tension allows water to support the insect. I hope this helps.

ANSWERED AT 28/02/2020 - 11:20 AM


QUESTION POSTED AT 28/02/2020 - 11:20 AM

30 POINTS In class we are doing a shrinky plastic lab, does it matter how long you hold the special plastic over the flame?

Usually with shrink plastic if you only let it shrink for a little bit it will curl up and won't fully shrink, but if you let it shrink for longer it will flatten out and shrink for a final time. Shrink plastic doesn't burn or melt easily either, so just let it go until it is decently flat.

ANSWERED AT 28/02/2020 - 10:44 AM


QUESTION POSTED AT 28/02/2020 - 10:44 AM

Explain why are hydrogen and oxygen considered as wheares water as a compound?

Hydrogen and oxygen are different elements.

when two or more elements combine, they form a compound

hence, two molecules of hydrogen and one molecule of oxygen combine to form water as a compound

ANSWERED AT 28/02/2020 - 08:11 AM


QUESTION POSTED AT 28/02/2020 - 08:11 AM

Explain why are hydrogen and oxygen considered wheares water as a compound

Hydrogen and oxygen are different elements ...
but when two or more elements combine... it is known as a compound.. hence hydrogen and oxygen together form a compound

ANSWERED AT 28/02/2020 - 08:10 AM


QUESTION POSTED AT 28/02/2020 - 08:10 AM

A student comes to the conclusion that solids are denser than liquids. Is this true? Explain.

True, because a liquid can be taken and added, but a solid stay the same never losses and never gains

ANSWERED AT 28/02/2020 - 07:04 AM


QUESTION POSTED AT 28/02/2020 - 07:04 AM

Help please! The melting point of water is _____. 100 degrees 40 degrees 0 degrees -10 degrees

The melting point of water is 32 degrees F and 0 degrees C.

The answer is C. 0 degrees

ANSWERED AT 28/02/2020 - 06:00 AM


QUESTION POSTED AT 28/02/2020 - 06:00 AM

HELP ME PLEASE ILL GIVE 30 POINTS

I was thinking it was D

ANSWERED AT 28/02/2020 - 04:09 AM


QUESTION POSTED AT 28/02/2020 - 04:09 AM

Help plz 39 points!!!!!!

In order,
D
A
C
B
E
I hope this helps

ANSWERED AT 28/02/2020 - 04:05 AM


QUESTION POSTED AT 28/02/2020 - 04:05 AM

PLEASE HELP ASAP When a substance is boiled, what happens to the mass? The mass increases as it changes from a liquid to a gas. The mass stays constant as it changes from a liquid to a gas. There is no mass once the substance becomes a gas. The mass decreases as it changes from a liquid to a gas.

The mass stays constant as a substance changes from a liquid to a gas.  

The Law of Conservation of Mass states that, in ordinary chemical reactions, mass is neither destroyed nor created.


That is, the mass of the reactants must equal the mass of the products.


2H₂O(ℓ) ⟶ 2H₂O(g)


   1 g              1 g


If the mass of liquid water is 1 g, the mass of the water vapour must be 1 g.


Even though the water vapour is a gas and you can’t see it, it still has a mass

of 1 g.



ANSWERED AT 28/02/2020 - 04:01 AM


QUESTION POSTED AT 28/02/2020 - 04:01 AM