Hydrogen Definition and 1000 Threads

Hi, I'm not sure what I just created. First I mixed sodium iodide with hydrochloric acid. Then to that I added a hydrogen peroxide/ sulfuric acid mixture (thinking it was just hydrogen peroxide). It seems a black precipitate is forming. I was trying to make potassium iodide using an...

Homework Statement I have attached a solution to one of my homework questions that states "Draw hydrogen bonds that might be formed between a water molecule and the following compounds: a) H3PO4; b) PO43-; c) aniline; d) pyridine; e) ethylamine; f) ethyl ammonium ion; g) acetic acid." My...

Homework Statement A sample of hydrogen is at a pressure of 1000mb and a temperature of +10° C. Calculate its specific volume.Homework Equations I'm guessing PV=mRT The Attempt at a Solution P=1 bar m=2 g R=constant (do I use the universal constant or is there a constant for Hydrogen? If so...

"Given a simple and violent chemical reaction { H + H → H[SIZE="1"]2 + 5eV }. however when hydrogen atoms collide in free space they simply bounce apart. the reason is that it is impossible to satisfy the laws of conservation of momentum and conservation of energy in a simple 2 body collision...

Homework Statement

I was wondering if someone could explain how the laws of thermodynamics apply to these so called hydrogen on demand systems and or how these laws govern the operations of these systems. Physics is my next college course but, I am not asking this for any assignments I have, just a personal interest.

Homework Statement Could one expect to get a good thrust off oxygen and hydrogen fuel in a gaseous form, pumped at ~60 PSI into a 2 liter container? How much (in terms of mass) oxygen and hydrogen would be in the said container at such a pressure, assuming we have a 2/1 hydrogen/oxygen ratio in...

A sole hydrogen atom in a vacuum (negligible gravity). The hydrogen atom has the lowest possible kinetic energy allowed by QM. Given that casimir effects apply... Will the hydrogen atom remain at it's initial lowest kinetic energy state indefinitely or is it possible for it's energy state to...

Imagine that we have got some vessel under standard temperature and pressure filled with atomic Hydrogen inside and the electrons of these atoms have got the same spin and therefore they cannot join into Hydrogen molecules, so the process of recombination does not occur. Then we begin cooling...

Does chlorine make a hydrogen bond? I was doing a practice problem in my book and the question was regarding the intermolecular forces, and the compound had chlorine and it said no, but my professor said it does. Which is true?

Hydrogen, in the presence of oxygen, will combust when exposed to a heat source and form water. At least this is what I have gathered from some googling. But I haven't been given a satisfactory, detailed explanation as to why this occurs. Would anyone here be willing to describe this process to...

Homework Statement A proton, which is the nucleus of a hydrogen atom, can be modeled as a sphere with a diameter of 2.4 fm and a mass of 1.67e-27 kg. Determine the density of the proton. Homework Equations As far as I know, the only required formula is D = m/vThe Attempt at a Solution Well...

Hello, I was wondering if it could be said that any proton can be identified as a hydrogen cation, and any hydrogen cation as a proton. Thanks.

Calculating the internal energy of gasoline is fairly simple, because it wouldn't vary much with temperature or pressure. For hydrogen, though, it would vary significantly with each. What sort of ranges would we be looking at? I'm curious if it would be possible to get the same amount of...

Hi,Everyone! I have a question! We often say hydrogen atom spectrum. But in nature ,it exists in the form of molecular hydrogen. today, I read something about hydrogen atom spectrum experiment. In the experiment ,we use hydrogen lamp. The Hydrogen lamp is a long glass tube filled with Hydrogen...

Hydrogen gas is supposed to be colorless, but what causes the murky grey-white color of the hydrogen gas produced in this reaction? http://www.youtube.com/watch?v=oQz5YEsx7Fo&feature=related skip to 00:30

If a hydrogen spectrum tube is filled with H2 gas and powered on, why do online sources show the tube emitting the spectrum of atomic single H hydrogen (the spectrum defined by the Rydberg formula)? Why not the H2 spectrum? For example, here: http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html

HI,everyone.I have a problem. the angular portion of wavefunction of hydrogen,like 3d. n=3,l=2,so m=2,1,0,-1,-2.I read some books that say dxy,dxz,dyz,dz2,dx2-y2,so what the corresponding Relation between them. for example,dz2 corresponding what ?m=0?? and why? any help will be highly appreciated!

is it pauli or schrodinger? is there any original reference?

How to calculate the energy of the bonding state and antibonding state of a hydrogen molecule? and also how to plot the bonding and antibonding wavefunctions. I have solved Ψ(r,θ,Φ) for a hydrogen atom. and calculated the energy states of it with complete analytical approach. now, i need to...

I am doing my research on quantum transport. Now, I have some confusions- my questions and my idea about those go like this- 1. what is the ground energy state of hydrogen molecule? >> as long as i know, hydrogen molecule has a bonding state and an antibonding state. i think bonding state has...

All I need to evaluate the normalization coefficient. I need a step by step guide. It will be a great help if someone please tell me where can i get the solution (with intermediate steps). I think the solution can be done using the orthogonal properties of associated Laguerre polynomial. I need...

"Prove that the Bohr hydrogen atom approaches classical conditions when [. . .]" Homework Statement The problem and its solution are attached as ProblemSolution.jpg. Homework Equations E_k = chR/(n_k)^2 E_l = chR/(n_l)^2 ΔE = hc/λ hc/λ = chR[1/(n_k)^2 – 1/(n_l)^2] 1/ λ = R[1/(n_k)^2 –...

What exactly is it that makes the energy/mass of a hydrogen atom be lower than that of the electron and proton separately? I am aware that this process is what causes stars to emit light, during nuclear fusion deuterium has a smaller mass than a proton and a neutron so its extra mass/energy is...

hello folks, i was wondering if any other possible process of separating hydrogen from water without or less risk, any alternative method of electrolysis. i have googled this thing and stuck to process of introducing a catalyst 'titania(titanium oxide)' in the presence of sunlight...

We know this tiny splitting in degenerate levels in Hydrogen spectrum due to magnetic interactions between spins of electron and proton. but is that true the proton spin is independent of energy in this (hyperfine) splitting? I want to understand the physics of this splitting and how the spin...

why is hydrogen the only element in the periodic table that lacks a neutron?

I'm looking for the BEST and most COMPLETE book describing - The quantum mechanics of the hydrogen atom (working out completely the Schrödinger wave equation) - The quantum mechanics of many-electron systems (with a thorough explanation of the independent particle model, central-field...

With our stars consuming hydrogen to make helium, how much has been consumed since the Big Bang? I know 73 or so percent of the total mass of the visible universe is hydrogen, so how much has been consumed? IE, what was the original proportion of hydrogen to helium to other elements? I know we...

Why don't they tend to stay as they are?

Hello, First of all, i know I should use the template for this, and I apologize for that, but the thing is I don't even know how to begin to solve the next problem, and it's very important for me and for my tomorrow's afternoon exam. It's quite qualitative, and I'm sure most of you will know...

I'm doing a presentation on Hydrogen Fuel Cells for my class, but I'm having a hard time understanding how exactly it is that they work. I'm only able to find information on fuel cells and they tend to not be descriptive on the hydrogen part. If someone could please link some articles that...

The term (E-V) which stands for kinetic energy is used in Schrodinger equation.Kinetic energy of electron needs motion and fixed path which leads to the conclusion that electron is moving around the proton in orbits and is not spread out because derivation of Schrodinger equation is based on...

if delocalization of electron in hydrogen atom means that it is spread out upto infinity it means that infinite time is required for the electron to be localized when hydrogen atom is ionized.Is it so?

Homework Statement I have hydrogen in a 12 L tank, at T=15 C. Some of it is used, the T = const. and Δp=0.4 MPa, the molar mass of hydrogen is M=2*10^-3 J/(mol*K). Find the mass of the used hydrogen. Homework Equations Am I wrong in simply using: \Delta m=\frac{M}{RT}V\Delta p ...

Why does the Van der Waals forces of hydrogen weakest in liquid state?

Homework Statement Find the constant A such that the equation \psi(r,\theta,\varphi)=\sqrt{6\pi}A\sqrt{r}e^{-r/a} Wich describes one electron in a hydrogenatom, is normalized The Attempt at a Solution I figured this equation is seperable in the form...

Let's say I have a balloon full of Hydrogen that is STP, and outside this balloon I have normal air (containing oxygen) which is also STP. Is there a way to produce energy by turning these 2 items into a fuel cell, if so how practical is it (in a DIY setting) and is there anything that would...

I'm here got a small question, what is the different between L2 and L for the hydrogen atom. Do L2 means total angular momentum and L means angular momentum?:confused: Given that L2=l(l+1)ℏ2 and L=(√l(l+1))ℏ THX :smile:

My textbook seems to give conflicting information on whether molecular hydrogen can or cannot be detected. On the one hand it says (p393) "Dark matter is not hydrogen gas (atomic or molecular), nor is it made up of ordinary stars. Given the amount of matter that must be accounted for, we would...

I just did exercise 1.22 in Modern Quantum Chemistry by Szabo and Ostlund. This is a practice problem about linear variational method. ---------------------------------------------------------------------------------------- Question: The Schrodinger equation(in atomic units) for a hydrogen atom...

Consider a universe where the intrinsic spin of the electron is S = 5/2, but all other parameters and Rules of Quantum Mechanics are the same. Find the degeneracy of the n=1 and n=2 levels of hydrogen. My understanding is that electrons in an atom have 4 quantum numbers n,l,ml,ms, and different...

The Schrodinger equation solved for the hydrogen atom gave good agreement with spectral lines, except for line doublets. To account for these electron spin theory was grafted onto the theory, despite the problem of electron being a point particle. In 1928 Dirac gives his different answer...

Is there any other elements that can be used for fusion?

What is the uncertainty speed of a hydrogen atom inside a virus? Even though the vaue of uncertainty in position is not given. Any help on this would be greatly appreciated. Thanks!

help please, for question: a hydrogen atom, initially in ground state, absorbs a photon, and is excited to its second excited state. What were the wavelength and the energy of the photon by the atom. Did i do it right. 1/λ = (1.097*10^7)(1/n1^2 - 1/n2^2) 1/λ = (1.097*10^7)(1/1^2 -...

I have asked a question about this before but this is a different question. The experiment that my lab partner and I performed used a 360 degree rotating assembly which had the light source (Hydrogen and Sodium) and the telescope at opposite ends while the diffraction grating sat in the...

Hi there, I have a question about the Teller–Ulam hydrogen bomb design. This will be a long post , but I hope someone can answer it for me. When the first bombs were created, uranium device was simple enough to to figure out. Two sub critical masses of u-235 joined at... I...

Homework Statement The problem (4.13 (b) in Grifitths) asks to find <x^2> of the ground state of hydrogen atom. It asks to do so without new integration. Supposedly, there is some kind of symmetry and one can use the results from part (a) of the problem. Part (a) is finding <r> and <r^2> for...

Mumetal is a high magnetic permeability alloy. It is known any kind of mechanical deformation changes its microstructure leading to loss of superior magnetic properties. Annealing of machined parts fabricated from mumetal is standard. I keep reading in literature, perhaps everyone getting...