for the purpose of making water in the Laboratory, If H2 & O\ngases are combined together, will water in liquid form start to form, if it is possible, is its value for money feasable?
124534
It is very possible, the reaction is as follows,\n\n2 H2 (g) + O2 (g) --> 2 H2O (g)\n\n2  moles of Hydrogen gas react with 1 mole of Oxygen gas to form 2 moles of water vapor (steam).\nThe is a very exothermic reaction which proceeds very quickly in an explosive fashion.\n\nHere is a video (1.7 MB) is this reaction taking place.\nYou will see 3 ballons tied to a string.  The balloons float since they are filled with Hydrogen gas (less dense than air).  Attached to the ballons is a flaming peice of toilet paper which acts a sa fuse.  When the flame reaches the rubber of the ballons, the rubber melts, and the Hydrogen exploads.\nhttp://www.amazingrust.com/Other/Making%20Water.wmv\n\nThis process is obviously not very practical for everyday use, it is a much better demo than anything else.
391485
You talking about liquid hydrogen here?\nIf you are then the answer is no....any other liquid would be above the boiling point of liquid hydrogen.
449384
Li2O + H2O --> 2 LiOH\n\nIf you include the H2 it will never ballance.  You will not end up with H2 as a product anyway since OH will react with Li and the remaining H will react with the LiO hence 2 of LiOH.  Now on both sides of the equation you have 2 - Li, 2-O and 2-H.  If you did want to include a water molecule on the produst side then the equation would read as follcws:\n\nLi2O + 2H2O --> 2LiOH + H2O\n\nthis equation ballances with 2-Li, 3-O and 4-H on each side\n\nThe first equation shaow the ideal combination of the two compuonds (what most teachers are looking for) and the seccond equation shows a instance where there is not enough Li2OH to completely react with the all of the water
378123
as hydrogen is highly combustible it can be directly used to warm water\nand to generate electricity fusion reaction can be used which give enormous amount of heat
436739
100% sure\n1. D\n2. B\n3. D (electrons become part of the WATER molecule which eventually reacts with hydrogen to form water)
126303
Hydrogen is the lightest and flamable, in other word, can be burned, element in its natural form, which is gas. Once it 's been turned into liquid itself, hydrogen does not hold its characteristics well because of the temperature is being used to keep the liquid form. So hydrogen, itself, already not stable.\nOxygen, on the other side, have most its characteristics in liquid or gas form. It is not flamable in the sense that it can not cause fire. But it can be burned and is needed for the existence of fire. So Oxygen is a little more stable.\nNow once Oxygen and Hydrogen combine together, because Hydrogen is very light, and Oxygen is heavier (it really involves all the atoms, especially electrons), Hydrogen tends to assume some characteristics of Oxygen. This includes the stable condition.\nAlthough after combined, they show to be very stable and hold very tight to each other, there was a explosion during the process of combining. As we know, water is the molecular compound, H2O, which means two molecules of hydrogen and a molecule of Oxygen in the mixture. In the normal process of making true water, an estimated amount of Hydrogen and Oxygen gases are put into tank with the ratio of 2:1. However, it is only estimated, so sometimes one gas can be a little more than the other. Also, they are both put in tank in very small amount at the time, then add some more. So the reaction would be slow and controllable.\nIf the two gases are put in at the same time, exact Hydrogen and Oxygen at the ratio of 2:1, and large amounts, they can become Water Bomb. Thus, water does reach a flash point (just not when heated).\nYour question is not stupid. It is very interesting and very smart. Normal people would not care to think out of the box or would not know more than they should. You should reward yourself for being brave enough to ask. But this is the important thing: I recommend you not to try the Water Bomb because it requires very detail and exact conditions. It should only be done in lab with supervisor. The explosion can be big...
19062
i agree with the second one.  water is clearly defined as having two hydrogen and one oxygen atom.  if it doesn't have oxygen, then it can't be water.\n\nit is possible that the "water" is actually liquid hydrogen, carbon dioxide, etc.  if the "water" is a solid, it can be the frozen of anything above plus lots of other compounds or elements.\n\nif this meteorite was found on earth, then it probably wasn't any of those either since it would have melted.  if it was still a meteor in space, then it could be.  comets are known to have "ice" and dust as their tail.  this isn't really ice as in water turned to ice, but ice is used to refer to other elements or compounds in the solid form (dry ice is CO2).\n\nif you read that in an article in a magazine or newspaper, they were probably try to make it easier to understand what they were trying to say, and decided to use water to describe a liquid or ice to describe the solid that they found.
55656
Cars powered by ordinary water...Time will come (most likely in the very near future) where water can be separated into its components economically. Water is made up of hydrogen and oxygen. Hydrogen is a very good fuel (sun's energy comes from hydrogen) and oxygen is needed for efficient combustion...The problem is, the bond between hydrogen and oxygen is so strong that it is still expensive to separate them as of now...Car makers though have started experimenting with cars powered by hydrogen but using fuel cells...Still an expensive proposition.
359463
It's C. H2O is usually the product of a reaction between strong acids and strong bases. The others are wrong because they use H2O as a reactant and H2O isn't a strong base or acid. It can actually be used as both a weak base and a weak acid because of its uniquness in having both a H(+) ion and an OH(-) ion which by themselves usually identify either a acid ( such as H2SO4) or base (such as NaOH)
362820
This is essentially correct as far as you have gotten.  The answer to the second part of the question is no.  Reduction of a water solution of CaCl2 will result in H2 being produced at the cathode because the reduction potential is much lower than that of the Ca+2 ion.
406384
Yes.\n\nThere are two states for liquid helium. In the second state it has such a low surface tension that it does flow uphill.\n\nIf you put water in a glass and look at the very edge of the surface you will see it curve from flat, upward to the glass. The water molecules are being attracted to the glass, but are pulled back by attraction to other water molecules and gravity. With helium, this happens but the attraction to spead out is greater....
541000
try thinking about the energy needed to break the ionic bonds. water can be split, but the energy needed is massive, because the bonds are so stable
351452
If its just proof-of-concept, could you use the pressure of a tank of liquid CO2 to pressurize your vessel with CO2?? Add some liquid CO2  (or even just some dry ice!!) to your vessel from the tank and warm it up to get the desired pressure?\n\nOr possible collaborate with somebody who does CO2 cleaning research?? You might be able to get some preliminary data cheaper by renting their equipment than building your own.
67349
Actually, that is a somewhat simplified reaction,\nin reality, the water and Carbon Dioxide dont form directly, they form after a secondary reaction (Carbonic acid decomposing).\n\n3Na2CO3 + 2H3PO4 --> 2Na3PO4 + 3H2CO3\nH2CO3 --> H2O + CO2\n\nSo combining them,\n3Na2CO3 + 2H3PO4 --> 2Na3PO4 + 3H2O + 3CO2
40041
>>>>>at 4 degrees above its freezing point, water sinks.\n\nThis is true.\n\n>>>>any lower, and it begins to freeze, forms crystals, and floats.\n\nThis is not true. Water begins to freeze at 0oC, not at 3.9oC or even 1oC.\n\n>>>>any warmer, and the molucular action makes it less >>>>dense.\n\nThis is not true. Water becomes less dense at warmer temperatures due to kinetic motion impeding the formation of hydrogen BETWEEN molecules.
280188
"Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom."\n\nSource: http://en.wikipedia.org/wiki/Water\n\nWater is just another combination of basic elements, why they formed, and in the quantities they did is open to speculation.
49071
Excellent question. It is possible. I assume you mean the solid form of water (ice). It is theoretically possible. At this time finacially impossible. You would lose a percentage of the surface area of the ice by sublimation. How do you propose to freeze the water to begin with? How will you keep it frozen (remove absorbed heat energy)? Where will your source of water be? If you are taking water from Earth, how will you get it into space?