Hydrogen Definition and 1000 Threads

As simple as the questions seems, I can't seem to find an answer. 1. Can atomic hydrogen by chemical reaction, be converted to molecular hydrogen? 2. what happens when putting electrodes in a reaction that would give me atomic hydrogen? would it be collected at the cathode like molecular...

What is the reaction of hydrogen and oxygen say in a vacant tube in absence of air, does it give Water, or hydrogen peroxide? and the amount of hydrogen and oxygen is the same of water ratio 2:1 In the Kanzius experiment, the hydrogen and oxygen are produced (together) and not ionized, so the...

Inter-atomic force in a Hydrogen molecule -- finding "spring" stiffness Homework Statement At about 2000 K the heat capacity (at constant volume =) increases to (7/2)k per molecule due to contributions from vibrational energy states. Use these observations to estimate the stiffness of the...

I have been trying to picture the whole process of a photon emission by a atom. So to have good understanding what is going on, I have came up with following experimental setup. A single hydrogen atom in excited state ^2\!P_{1/2}, which has been orientated with a magnetic field so that...

I often hear that stars form when giant clouds of hydrogen start to collapse under gravitational forces, so I started thinking about this. Gravity depends on the masses and distances of objects. So how many atoms of hydrogen would you need, and at what average distance would the atoms need to...

the question states that the emission spectrum of hydrogen contains a line with wavelength 656.2nm. and we need to approx find out what temp the H gas needs to have to be heated before this line appers in the spectrum i have worked out that for this wavelength the electron mov from level 3 to...

I'm interested in hydrogen injection for my 1 ton Dodge diesel truck to improve fuel mileage and power as well as lower pollutants. Electrolysing water to produce a stoichiometric mixture of hydrogen and oxygen (called HHO or hydroxy or "Brown's gas") and then injecting it into the turbo intake...

Could anyone help solve a problem how to find absorption lines in hydrogen atom from n=10 (n - principal quantum number). I know that not all quantum jumps of an electron in atom are possible, thus I don't know how many different emission lins will be from this energy level where n=10.

Homework Statement A cylinder contains 270 L of hydrogen gas (H2 at 0.0 C) and a pressure of 10 atm. How much energy is required to raise the temperature of this gas to 31°C? (answer needs to be kJ) Homework Equations PV =nRT and Q= MCT The Attempt at a Solution PV = nRT==> M=...

The Hydrogen Atom wave function. With the substitution u(r) = r.R(r) p=kr We get a simplified version: d^2u/dp^2 = [1 - (p_0)/p + l(l + 1)/(p^2) ].u Im sure some of you have seen that before. Now, in the limit, p goes to infinity, I understand that we get u = A.exp[-p], but in...

Homework Statement Below about 80 K the heat capacity at constant volume for hydrogen gas (H2) is 3/2k per molecule, but at higher temperatures the heat capacity increases to 5/2k per molecule due to contributions from rotational energy states. Use these observations to estimate the distance...

I come from Hong Kong and want to know the ans. THX very much! Also curious to know, which nationality will browse this forum most?

I assume general relativity allows us in principle to calculate volumes of some region of space? If so, if I have a large volume of space far from other mass and energy does it make sense to ask how much a large volume of space changes depending on whether or not it contains the mass of single...

1.A cloud of neutral hydrogen is moving towards us at a speed of 70 kilometers per second. At what wavelength would one observe the radio spectral line characteristic of neutral hydrogen? 2. The filament in a regular incandescent light bulb reaches a temperature of 2900 k when it's on. a...

Homework Statement In the Bohr model of a hydrogen atom, what is the magnitude of the electric force exerted between the proton and the electron when the electron is in the n = 1 state? Homework Equations E= - 13.6 eV/ n^2 The Attempt at a Solution I simply...

Homework Statement A gas of hydrogen atoms has a fraction of atoms found in the n=2 quantum state of 0.05. What is the temperature of the gas? The Attempt at a Solution I think the gas molecules have an energy E=5/2kT (rather than E=kT ?? because diatomic gases have 5 degrees of...

This may not even be a valid question, as I may have misunderstood; but here goes... At 25C, the KW of water is 1 x 10-14 If you increase the amount of hydogen ions present, why does the concentration of hydroxyl ions present alter in such a way that the KW is maintained (i.e. the product of...

Homework Statement A hydrogen chloride molecule may be modeled as a hydrogen atom (mass: 1.67 x10^-27 kg ) on a spring; the other end of the spring is attached to a rigid wall (the massive chlorine atom). If the minimum photon energy that will promote this molecule to its first excited...

say we had two states \psi1 and \psi2 and i want to model the superposition of the two states \psi=c1\psi1+c2\psi2. how do i find c1 and c2? I've been trying to do c1=\int\psi \psi1 r^2dr over the limits 0 and infinity but i don't seem to be getting anywhere. does anyone have any ideashow i...

hi, if p is a solution of the schrodingers equation for the hydrogen atom then is pt? (where t is the time and p is the known solution) i don't no how to do this due to the complexity of the wavefunction in the first place thanks

Hi, I've a question that shows me a diagram for wavelength, there's 4 of them 11.1 x 106 10.5 x 106 9.7 x 106 8.4 x 106 then it asked me to determine the ionisation energy of hydrogen in KJ mol-1 by using the above spectrum. From what i know E = hf f = c/lambda lambda being the...

Homework Statement You place 83 moles of hydrogen gas in a balloon of volume 2.8 m3, and find the pressure to be 1.4 times atmospheric pressure. What is the typical speed of a hydrogen molecule? Homework Equations v=(sqrt)((3*Boltzmann Constant*T)/mhydrogen T=pv/nr The Attempt...

Homework Statement In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.01e6 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.84e-11 m. Answer in units of N. Homework Equations Fc=m*v^2/R The Attempt...

Ok, hydrogen is the simplest and most abundant atom in the universe. And I read that atoms are contantly trying to turn into a more stable being, where iron atoms are the most stable. Stars fuse hydrogen for energy, and when the hydrogen runs out, the stars life is over. So I have two...

Hello Everyone! I need help on this topic. Can anyone provide me some details on how to solve the problem? Thanks..

Homework Statement In lab we recorded a barometric pressure of 768.2 torr. Suppose we didn't have access to a barometer and assumed that atmospheric pressure was 760 mm Hg. Would the mass percent of hydrogen peroxide that you calculated for the solution be higher or lower than the value you...

Homework Statement Consider an electron in the hydrogen atom with radial wave function R_{31} (n=3, l=1). Please verify that this radial function verifies the radial equation. Homework Equations The radial equation \frac{1}{r^{2}}\frac{d}{dr}\left(r^{2}\frac{dR}{dr}\right) +...

What? Is there any truth to this? The caption on a space.com photo of the oldest object ever found says, "… since all the optical light has been absorbed by intergalactic hydrogen gas, leaving only infrared light." I'm thinking the expansion of space is a more likely explanation...

How does it bleach hair? My Chemistry professor at college told us about how chemical straightening works, but failed to explain how peroxide can change hair colour. Thanks a bunch!

I'm not sure but I found this... [When an electron makes a transition from one energy level to another, the electron emits a photon with a particular energy. These photons are then observed as emission lines using a spectroscope. The Lyman series involves transitions to the lowest or ground...

A hydrogen atom is consists of a proton (uud quarks) and an electron. Is there a heavier atom of hydrogen that consists of a type of proton (ccs or ttb quarks) and a muon or tauon respectively? Are these

Homework Statement A hydrogen atom in its ground state is illuminated with light having a wavelength of 96.7 nm. can the hydrogen atom's electron be excited to a higher energy state by absorbing one of these photons? If so, determine the state and wavelength of any photon that would be...

1. Calculate the velocity dispersion for hydrogen atoms in the solar photosphere, which has a temperature of 5800 K. 2. I know no equations to solve the problem. 3. I have no idea any method of going about solving for velocity dispersion. I would appreciate any guidance. Thanks

Homework Statement Find the (algebraic) relationship between the wavelengths of the equivalent transitions (i.e. same n1 and n2) for hydrogen-like ions of atomic number Z and hydrogen itself. Homework Equations I know: h\nu (n_{1} , n_{2} ) = C_{1}Z_{1}^2(\frac{1}{n_{2}^2} -...

Homework Statement Use the Bohr theory to find the series wavelength limits of the Lyman and Paschen series of hydrogen. Homework Equations \lambda=\lambdalimit(n2)/(n2-n02) Lyman: n0=1 Paschen: n0=3 The Attempt at a Solution The solutions are 91.13 nm (Lyman) and 820.1 nm...

Homework Statement A hydrogen atom is in the n=6 state. a) Counting all possible paths, how many different photon energies can be emitted if the atom ends up in the ground state? b) Suppose only\Deltan=1 transitions were allowed. How many different photon energies would be emitted...

Homework Statement A line of wavelength 1093 nm is observed in the hydrogen spectrum. Identify the transition that leads to this line. Homework Equations where n refers to the upper state and n' to the lower state. 1/lamda = R (1/n' - 1/n) -----1 Ei - Ef = hc/lamda ------2...

What is meant by total negative energy associated with bound bodies like planets. and also total energy of the hydrogen atom is negative. I wonder how it could be? Because I believe whatever negative energy may be, It must only be associated with bound systems, and I don't think that an isolated...

I was watching "The Universe" series talking about scram jets, and how hydrogen is one of the most common elements in the universe. After some searching I found this http://en.wikipedia.org/wiki/H-alpha" about different states of hydrogen atoms. Which made me ask what I thought to be an obvious...

Homework Statement For a object of mass m, Heisenberg’s uncertainty principle relates the uncertainty in the object’s position Δx to the uncertainty in the object’s speed Δv: (Δx)(Δv) ≥ (h divided by (4)(pi)(m)) where h is Planck’s constant. Calculate the minimum uncertainty in the speed...

Calculate the polarizability "a(lpha)" of atomic hydrogen in terms of R Homework Statement A simplified model of a hydrogen atom is that the electron cloud is a sphere of radius R with uniform charge density and total charge -e (The actual charge density in the ground state is nonuniform)...

Homework Statement A sample of gaseous substance composed of only hydrogen and boron, underwent combustion with excess oxygen. As a result, all the hydrogen turned into water, and all the boron turned into B2O3. a) find the empirical formula of the substance? b) find the chemical formula...

This is not homework, but is not general discussion, so not sure where this would go. In class we were deriving with the radial equations of a hydrogen atom, and in one of the equations was the commutator term: \left[ \frac{d}{d\rho}, \frac{1}{\rho}\right] my attempt was: \left[...

Homework Statement Using the Feynman-Hellman theorem, determine the expectation values of 1/r and 1/r^2 for the hydrogen atom. Homework Equations Hamiltonian: H=-\frac{\hbar^2}{2m}\frac{d^2}{dr^2}+\frac{\hbar^2}{2m}\frac{l(l+1)}{r^2}-\frac{e^2}{4\pi\epsilon_0}\frac{1}{r} energy...

What is the relative velocity of two hydrogen atoms colliding head on at a temperature of 10 million Kelvin? How do you calculate this?

Homework Statement Find the binding energy for hydrogen in kJ/mol through positron emission. 4(11H) → 42He + 2(0+1ß) Homework Equations E=Δmc2 Mass of Hydrogen: 1.0079 amu Mass of Helium: 4.0026 amu 1 amu = 1.6605 x 10-27kg The Attempt at a Solution Here is what I did: Eb=...

Hi All, Thermodynamics forbids perpetual motion based in its second law, but how should one deal with an isolated H atom, seen here as a machine? Is there a concrete perspective of its stopping? In its stationary and fundamental state may one observe dissipation? Thank you DaTario

Homework Statement Find the electric potential a distance of .5 x 10^-10 m from the proton of a hydrogen atom Homework Equations V= kQ/r The Attempt at a Solution I know how to answer the question, because I know which equation to use. What I do not understand is, where the...

This is most likely very simple, but I can't figure it out. http://www.sussex.ac.uk/physics/teaching/btv/Lect02_2006.pdf Step 5 they've got an equation for \Phi. They then normalise it to get A = \frac{1}{\sqrt{2\pi}}. Every time I do the integral I get: A^2.^{2\pi}_{0}[...

Moved. Delete please.