Does size affect the rate of diffusion?
830323
yes size matters in determining rate of diffusion.bigger the size  more the time taken for diffusion.
264756
i assume you're talking about a filter?  mesh size has to do with the size of the particles the filter will trap.  although the affect on flow is pretty negligent, technically speaking, the smaller the mesh size, the more it will reduce flow, and the more particles it will trap.
535845
A solute cannot undergo reversible oxidation/reduction if it diffuses away from the electrode. The diffusion coefficient simply measures how quickly this diffusion happens. \n\nWhen deciding how reversible a particular redox reaction is by CV, you have to consider both the intrinsic reactive properties of the species in solution as well as how much material is lost to analysis as it diffuses away from your electrode.
844159
True \nPressure is caused by the collision of the atoms which make up a gas with the wall of a container\n\nFalse\nAtoms move about more rapidly in a solid than a gas\n\nTrue \nThe speading of a gas to fill a container is called diffusion\n\nTrue \nWhen a gas is heated, its atoms have more kinetic energy
703068
Hey we were learning about that in school this week. anyway Active transport is the "movement of materials through a cell membrane using energy"\nand Diffusion is "the process by which molecules tend to move from a area of higher concentration to an area of lower concentration\n\nactually diffusion is a form of active transport so really that is the similarity because its like parts of a whole((sorry if this was confusing))\n\n~*~*~*~*~*~*~*~~*~*~*~*~**~*~*~*~*~*~*~\nMy name is Brittany ((LoL i knrew it would be confusing))\n~*~*~*~*~**~*~*~*~*~**~*~*~*~*~**~*~*~\nim in 7th too. ((if its not too much can you e~mail me?))\n~*~*~*~*~**~*~*~*~*~*\nalright
756709
movement of molecules is primarily the only similarity. With active transport molecules move from an area of lesser concentration to an area of greater concentration, this requires energy.  Diffusion is also the movement of molecules but they move from an area of grater concentration to an area of lesser concentration; occurs because molecules have free energy, like the diffusion of o2 &co2 in the lungs
427612
Your question is not completely clear. Nevertheless, I will assume that it is intended that  Graham's Law apply, to wit:\n\nThe rate of effusion of a gas is inversely proportional to the square root of its molar mass. \n\nI will further assume that you meant hydrogen chloride.\n\nOn that basis ammonia would effuse faster.\nThus the answer to your question is ammonia.\n\nEffusion is the process whereby gases at low pressure flow through tiny pores or pinholes.\n\nDiffusion is a slower process than effusion because, as far as molecular motion is concerned, in diffusion, the myriad molecular collisions with molecules flying off in many directions, result in slower progress in any one direction.\n\nDiffusion is a slower process than effusion as is the progress of an individual moving in a certain direction slower, if he or she is in the midst of a high density crowd moving about in several directions as opposed to there being very few people around to impede his or her movement.
733501
Osmosis is the movement of water across a barrier.  Diffusion is the movement of other molecules, not necessarily across a barrier. Check out - \nhttp://www.madsci.org/posts/archives/feb2000/951455351.Cb.r.html for a more detailed answer on what diffusion is compared to osmosis.
110259
Diffusion is simply the movement of molecules from a place where they are in high concentration to a place where their concentration is lower. It occurs when the system is not in equilibrium.\nOsmosis is a special type of diffusion that happens through a membrane; when the membrane separates two solutions with different concentration of a substance, and the molecules of that substance cannot go through the membrane, then water molecules are the ones that do the moving until equilibrium is reached again.
895484
SURFACE AREA INCREASES\n\nIT'S VICE VERSA
134473
The answer is obviously (A). The bar may shrink a little, but it can't disappear completely, as the options B, C and D imply!!\nHence, by process of elimination, the answer is (A). :-)
329021
yes, the more the  intermolecular distance the more will be viscousity , it means it will be more compressible. Likewise diffusion and surface tension- It is very much clear that diffusion is proportional to inter-molecular distance.
905232
Diffusion thru semipermeable membrane depends on the concentration..ions will move from high concentration to low concentration.  The difference in charge (low vs. high) will cause a change in electrically voltage (mV), which will open the ion channels so the high concentration of ions will move into the low concentration.
770931
yes the kinetic velocity is incresed....due to the phase change...this is why we give energy for the liquid to vapourise to increase the energy of each molecule and seperate them ...for the motion to be faster
576639
With facilitated diffusion, proteins are needed to make an opening in the cell membrane.  However, once this opening is there, particles diffuse from the side which has the higher concentration to the side with the lower concentration, just like regular diffusion.  (The difference in concentrations is called the concentration gradient.)\n\nIn active transport, much more effort is needed to make it happen.  For example, in phagocytosis, the cell wall actually engulfs a particle and brings it inside the cell.  The difference is between the transport being facilitated or being forced.
136432
Here you have a free downloable PDF presentation from the 28 Sep 05 Conference Micro & Nano Technology (MNT) Measurement Club. I think it's worth to have a look.\n\n"Measuring Nanoparticle Surface Area and Porosity by Gas Sorption"\nMike Tucker, Quantachrome UK\nThe technique of gas sorption has long been used for the determination of surface area and pore size distribution of particulate systems and porous solids. While traditional sorption systems have proved adequate for the majority of tasks, the latest generation of ultra-fine materials, often coupled with microporosity offer new challenges to the sorption scientist. To meet these challenges many new developments have been made in the fields of analytical instrumentation and software modelling. The presentation will review some of the new techniques available, and provide examples to illustrate their applicability to the field of nanotechnology.\nDownload presentation: http://www.npl.co.uk/php/docs/download.php?area=metrology_clubs&path_name=/metrology_clubs/mnt/meetings/28sep05/presentations/connagh.pdf
846387
Why are you starting HW so late?   ...and starting to study for exams too?   \n\nYes ..you do it yourself...if I walked you through it, you'd not learn it nor understand it...I see you are having a hard time when you can't even spell "diffusion" correctly!!!!