if carbon dioxide is weightless,can someone tell me why...?
820473
Carbon dioxide is not weightless\nIn fact is has \n\n12g in carbon, and in oxygen it has 12, but as there is 2 carbon atoms there is 16g in oxygen\n\nSo 12+16*2 = 44g.\n\nHow do i know this? Look at the periodic table.
314798
gases are in general more soluble in cold liquids, so less of the dissolved carbon dioxide is lost from an iced glass of Coke vs. one at room temperature.  I've also noticed that drinks with artifical sweeteners tend to go flat faster, but I have not figured out yet whey it seems like the presence of large amounts of sugars affect the solubility of the CO2 yet.
399579
It would screw up a lot of calculations and other assigned physical values. Since no friction at all is 0 you would be claiming less friction than none. It is set up the way that it is for much the same reason that there are limits to aerodynamic lift and other forces that are nonsensical when allowed to become either negative or larger than one.
1000866
that's why mass is not wieght, it is not dependent on gravity. so yes
493932
Actually, the CO2 is not in liquid form.  The CO2 molecules are trapped in the liquid.  That is why you can actually see the CO2 rise to the top of the soda.\n\nWhen you shake the bottle, you are releasing a large volume of the CO2 molecules.  However, you might wonder why the pressure just stays the same since nothing has been added to the bottle.  What's the difference between the CO2 molecules being in the liquid or in the air space above it?  Quite a bit of difference.\n\nWhen the CO2 is in the liquid, it is not able to expand like  a gas.  It does take up space in the liquid, but the liquid keeps it in a more confined space.  When the CO2 escapes the liquid, it now fills the air space as a gas pushing in all directions.  It is now able to expand like a normal gas which is why you get more pressure.
378260
It's just frozen carbon dioxide (CO2).\n\nEDIT: Davidching, that's not true. Carbon dioxide liquid most definitely exists. At standard atmospheric pressure, it goes from a gas to a solid. But lower pressures, CO2 liquid exists.
911670
Weightlessness is merely a sensation felt by us. It is indeed a misleading term as you would have noticed since it still does have weight as it is still within a gravitational field.\n\nWeightlessness is a term used to describe the situation when a body (or a person) does not feel 'weighed down' by any force. In Physical terms, this merely means that the body does not experience a Normal reaction force, N. \nThis occurs when a body is falling freely, ie, it is undergoing the same acceleration as the acceleration caused by gravity.\n\nHope this clears up any misconceptions that the people who coined the term 'weightless' caused.
685823
Strictly speaking, it is not true.  CO2, being heavier than air, WILL accumulate on ground level, if the air is perfectly still for a long enough period of time.  Or if the CO2 gas is colder than the air.  \n\nKeep in mind, though, that since the molecular weights of CO and of air are pretty close, the relative rate of diffusion of CO in air will be fairly slow.  That means if you have something making CO and putting it into the air, the worst place to be is right next to it.  Especially if the air is still.
27816
no, the planet does not become lighter.  everything is energy.  the weight you lose is energy stored in your body and when you lose the weight that energy is released throught the exercise (presumably) that you did to lose it.  this stored energy is just converted into kinetic energy but that does not make the planet lighter per se.  you can look at it like when a car is driving and it burns up a tank of gas.  the planet is not lighter it is just that the gas was converted into other forms of energy.
416321
There is no such thing as a concentrated solution of the carbonic acid, as only a small amount of carbon dioxide will dissolve in water. Also, they are the same color, colorless in the pure form.
469018
I am sure that every one has been to the amusement park and on a ride that drops suddenly.  If so you have experienced zero gravity. Zero gravity is noticed when something is in free fall. For example 2 parachutists. From the ground they are falling due to gravity.  But to each other they are in free fall. Jump out of a plane holding a weighted object (one not affected by wind) As long as you and the object are falling together you are free falling.  Let the weight go and it will stay right next to you. Any airplane that climbs and then you push the stick over, it will drop away from you and you will float unless buckeled in.  Yes that is how they train in the cargo bay of a plane.  No special equipment needed (except the padding helps). They climb and at any point the pilot pushes the stick forward, the plane goes into a dive, and everyone is weightless. Altitude is only determined by: how long you wnat to float and being able to safely recover from the dive.  In the movie Apollo 13, the "floating space sequences"were filmed in the back of a cargo plane that had the space capsule set in it. They were weightless in those scenes. Yes the swimming pool training is very similar to weightless conditions, because they are in "zero bouyancy".
1034090
ok here is a really easy way to tell....lets take water and carbon dioxide...water is polar....carbon dioxide is nonpolar\n now to tell if it is a dipole or not just check to see if it is symetrical (both ways top to bottom and side to side)\nimagine u draw out carbon dioxide now fold it top to bottom and side to side, if it matches on all sides then it is not a dipole and it is nonpolar but with water\nwhich is bent if your fold it both it is not symetrical which means its polar and its a dipole \nhope that helps if you need more help just add details ill check back later.
949671
Does it have to have air in it?? Hydrogen gas is less dense than air, so that would make it lighter.
567550
did you mean cargo.  It has somthing to do with carbon that changes isotopes randomly.  years later there will be a change in cargo.
1144517
Technically, Dry Ice "Sublimes" into a gas.  Melting would imply it turns into a liquid.\n\nIn order to make dry ice, Carbon Dioxide (CO2) is cooled under pressure until it reaches the solid state.\n\nIt is possible for Carbon Dioxide to be a liquid, although, not under normal atmospheric condictions.\nLooking at the phase diagram of CO2,\nhttp://scifun.chem.wisc.edu/chemweek/CO2/CO2_phase_diagram.gif\nYou must put CO2 under quite a bit of pressure before it will liquify at any reasonable temperature.\nAlso from the phase diagram, you can see that at room pressure (~1 atm, 25 degrees C), you can see why dry ice goes directly into the gas state as its temperature increases.
1002178
Carbon dioxide acts as a greenhouse gas at all altitudes. You are correct that it is heavier than air, and therefore is less prevalent at higher altitudes.
35061
Photons have no mass, therefore no weight.