Where does the extra hydrogen go?
202305
Well, I can't completely answer this question.\n\nBut I would assume that the structure of anything would appear like the 'anything'.\n\nSo the chemical structure of C7H17 appears as C7H17.\n\nI do not know about the extra hydrogen.\n\nSorry if it's not useful, but it's all I got.
607957
The cheapest source of course is water, but getting hydrogen from water is expensive. Other sources of hydrogen induce\nsodium borohydride NaBH4, in which then added to water is will give out hydrogen gas.
154028
A and B are correct.  C is kind of sketchy.  The actuall amount of iron and other processed elements is still a very tiny fraction of the sun's total mass, and an even smaller one  on a per particle basis.\n\nOn one hand you could say that there is slightly less fusion fuel for the sun.  On the other hand it will have elevated levels of Carbon, Nitrogen, and Oxygen.  Other than fusing 4H->1He via the proton-proton chain, the Sun actually produces around 1% of its energy by turning 4H->1He by way of catalytic fusions involving carbon, nitrigen and oxygen (The CNO cycle).  As stars get bigger (and hotter) the CNO cycle becomes the dominant form of energy production.\n\nWhile the original almost "pure" hydrogen and helium stars technically had more "fuel," they would not have had the elevated levels of C,N, and O to produce energy along that path.
355031
Well if it's stable, there will be the same amount of protons as electrons. If it has a charge add or subtract. \n(If you have a plus charge, that means there's 1 more proton than electron... if you have a -2 there are two more electrons than protons etc.)
474401
As the temperature of a liquid increases, the less gas it can hold dissolved. If you set a cold glass of water on the counter, it contains dissolved air. That is what th fish breath, dissolved air. As it warms less air can stay dissolved, so it comes out of solution on the side of the glass.\n\nIt is not the H or O from H2O
436739
100% sure\n1. D\n2. B\n3. D (electrons become part of the WATER molecule which eventually reacts with hydrogen to form water)
563955
The electrolysis process seperates water into hydrogen and oxygen, and it requires a great deal of energy. Loosely speaking, if you reversed the process, you could get energy out of it, which, I believe, is what hydrogen fuel cell vehicles do.\n\nHowever, a system like this has to take seperated hydrogen and oxygen as input, not water. The reason is that the vehicle would have to run the electrolysis process forward, and then in reverse! The laws of thermodynamics tell us that energy will always be lost, and never gained, by such a process.\n\nHydrogen fuel cell vehicles would have to be supported by large electrical plants (nuclear preferably) which powered factories that ran the first part of the process. Energy is still lost in the end, but the overall cycle is highly efficient.
173672
Hydrogen isnt used as fuel in any aircraft that are currently in production today.  The fuel I handle most often for aircraft use is JP-8, but there are others out there. They are usually kerosine or kerosine-gasoline blends.
517154
Certin metals which are much more electropositive than hydrogen(viz. metal which are placed above hydrogen in the electro-chemical series) react with many acids and liberate hydrogen gas.in those cases ,the displcement of hydrogen of the acids takes plce diretly.but in majority of cases,this displacement process offurs through reaction between the acids and the oxides or hydroxides of metals.\nAcids also charatrised by their tendency to react with metal carbonates and bicarbonates evolving carbon dioxide.
224912
Hmmm....\n\nYour science grade cannot be helped if you can't figure out that Hydrogen, a gas, is not an alkali metal.
130266
the atmosphere is made mostly of hydrogen and helium but contains trace amounts of methane, water vapor, and ammonia. For futher information go here: http://en.wikipedia.org/wiki/Jupiter_(planet)#Atmosphere
408995
It's definitely a proton.  Consider the configuration of a hydrogen atom:  it consists of one proton in its nucleus and one electron orbiting the nucleus.  If you remove the electron to make a hydrogen ion, what do you have left?
312541
--Down a group, atomic size increases, there are more number of electron shells and so there are greater number of inner electron shells to 'shield' the outermost electrons. Nuclear force of attraction for the outermost electrons decreases as the atomic radii increase. Hence, less energy is required to remove and outermost electrons, so ionization energy decreases.\n--Across a period, number of electrons shells are the same, but 1 electron is subsequently added to the outermost shell. This makes the atoms more 'congested' and increases the nuclear force of attraction. More energy will be required to overcome that attractive force to remove the outer electrons, so ionization energy will increase.\n\n--A limiting reagent is one which gives the least number of moles of the product. So you must first find the moles for nitrogen and hydrogen by:[moles = mass/molarmass]. Then write out the balanced equation for the reaction i.e. \n\n2N + 3H2 ----> 2NH3\n\nFind the molar ration between hydrogen and ammonia, and subsequently calculate the moles of ammonia. Then find the molar ratio between nitrogen and ammonia and again calculate the moles of ammonia. Compare both moles of ammonia that you've calculated and use the lesser number of moles to find the mass of ammonia by: [moles = mass/molarmass] This will be the mass of ammonia formed after all the limiting reagent is used up.\n\n--I'm not sure about this last one, but I believe the first part is to calculate the ratio between ethanol and water in the solution. Find the moles of ethanol by using the % and using the concentration given, find the volume by: [conc. = moles/volume]. Now you have the volume and the density of ethanol and you can find the mass by: [density = mass/volume] Repeat for the mass of water. The mass and density of the solution is given, so you can find its volume by: [density = mass/volume] \n\n**Again, I'm not sure about this part; better to check similar problems in your textbook.
14916
Hydrogen and oxygen.  together, it's water.  Seperately, one is a powerful oxidizer that can, at high doses, attach tissues and potentially cause cancer; the other a powerful explosive gas.
234529
As mentioned above, two hydrogen atoms are brought together under high temperature and pressure so that they "fuse" into one and create a Helium atom.  What is not mentioned is that the result of this fusing is the creation of a huge amount of energy.  The energy comes from the difference in mass between the two hydrogen atoms and the resulting helium atom which weighs less.  The mass dissappears and is converted into energy in the form of electromagnetic radiation and kenetic energy of various particals.
187326
Franpal is correct, hydrogen and oxygen.  If you're thinking of a D, it may be 'heavy water', which has Deuterium rather than hydrogen (an isotope of hydrogen).
23941
Yes you could. Free hydrogen (H2) is rare in the atmosphere though, so you would have to buy industrially obtained hydrogen (which mostly comes from natural gas) which is expensive so its always cheaper to drill a water well or something. But yes, if you want to combine oxygen and hydrogen, and light it with a match, you will get water. Good luck trying to contain it after it goes from gas to the combustion product of hydrogen and oxygen, which will be water vapor (steam).