which two elements combine to form water?what proportion?
969451
ramila\n2 parts hydrogen & 1 part of Oxygen.
56978
water, water and more water
500967
Water.\n\nIt is the letter H to O, or H2O.
570980
If an element combines with another element to form more than one compound, the various weights of one compound which combine with the fixed weight of the other element bear a simple ratio to one another eg\nCarbon Monoxide C 12  + O 16\ncarbon Dioxide  C 12  + O 32\nRatio of 1 to 2
1167923
water is generated by combining Hydrogen and Oxygen in a retort and applying eletrical spark.\nCoolant and pharmaceuticals labs
877573
its gas\n\nArgon and oxygen have approximately the same solubility in water and are 2.5 times more soluble in water than nitrogenThis highly stable chemical element is colorless, odorless, tasteless and nontoxic in both its liquid and gaseous forms\n\nargon can form clathrates with water when atoms of it are trapped in a lattice of the water molecules
71034
Not sure what you mean. \n\nHowever water is a compound made up from 2 atoms of hydrogen(H) and one atom of oxygen (O), hence H20. You cannot have water without either element, so yes oxygen is needed to make water.
626673
I think the water is the end result of a chemical reaction. Water is not combustible, and never will be. It is a life giving force, unlike fire. I found out that bleach and this other cleaning liquid turn into nerve gas when mixed together. I don't have a good explaination for why this happens. It just does.
544064
The two reagents are in aqueous form, which means that they exist in ions. Upon reaction, the H+ & OH- will form water, H2O & the remaining ions will remain aqueous in the solution;\n\nNaOH(aq) + HCl(aq) ----> NaCl(aq) + H2O(l)\n\nNo balance required...
565188
water is  H2O, it's two separate element on the periodic chart - H for hydrogen and O for oxygen.
1080141
"what element(s) and what bond(s) make water a universal solvent?"
844238
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
903700
That is definitely not correct!!\n\nFor example water (H20) is very very different from the two gases that make it namely hydrogen (H2) and oxygen (O2)
866201
water itself, of course.\nThe following ions.....\niron ions, calcium ions, sodium ions, chloride ions, fluoride ions...\n\noxygen molecules, carbon dioxide molecules, sometimes around here hydrogen sulfide molecules.\n\nALMOST EVERYTHING is in water in minute concentrations.
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Oxygen, Carbon Dioxide, and Water
787311
A. H2O. Molecular water is 2H2O
222974
Two hydrogen atoms, one oxygen atom.  H2O