Carbon Definition and 497 Threads

Homework Statement I want to know if methane gas (CH4) is able to pass through activated carbon and not get trapped. If it can how does it pass and why does it passes. Homework Equations The Attempt at a Solution

The ground state electron configuration of Carbon atom is 1s^{2}2s^{2}2p^{2} For the electrons, 1s^{2}2s^{2}, L=0, S=0 So only consider electrons of 2p^{2}, and s_{1}=s_{2}=1/2 ---> S=0,1 l_{1}=l_{2}=1 ---> L=0,1,2 For S=0, L=0; J=0, so we have ^{1}S_{0} For S=0, L=1; J=1, so...

think that all the mass of the atom are concentrate in nucleus and the shape of the nucleus is like a ball with radius =1.5*10^5. IF the mass of the carbon atom = 2.0*10^23. what is the density of the carbon atom? the volume of the planet Earth=4/3pie*r^3 i just want to say that...

Looking for ideas that allow me to create Methane ( CH4 ) from gaseous hydrogen. This requires bonding one carbon atom to four hydrogen atoms, which should be simple enough, but there needs to be a minimum explosive danger. I know there are appliances to go the other way, but don't have the...

I thought that carbon monoxide in normal room air would be oxidized by the oxygen in the air, and that this would happen fairly quickly. Instead, I was astonished to read that CO is oxidized by the hydroxyl ion. Indeed, most flammable gases in the atmosphere seem to be consumed by hydroxyl...

Does there/or could there exist a molecule made only of carbon, that is smaller than C20?

Homework Statement Minimal growth medium for bacteria such as E. coli includes various salts with characteristic concentrations of mM and carbon source. This carbon source is typically glucose and it is used at 0.2% ( a concentration of 0.2g/100mL). a) Make an estimate of the number of...

A Carbon atom has 6 protons, 6 neutrons and 6 electrons orbiting. If an atom gains or loses an electron it becomes an ion with a negative or positive charge. If it gains or loses a neutron, then the atom becomes an isotope. From what I read, Carbon-12 is an isotope of Carbon. Yet Carbon-12 has...

Many people believe that plant-derived compounds are healthier than their "identical" artifical petrochemical counterparts. The only difference however is the amount of carbon-14 (more carbon 14 compounds from plant-dervied sources). So if anything, in this regard, wouldn't the artifical...

Hello, In my old papers, I could find a nice P-T diagram for Carbon Dioxide. I am interrested in liquid-gas equilibrium data, specially enthalpy and internal enery. Unfortunately, the diagram doesn't fit very well my current purpose. Moreover, I would like to make more use of my computer...

Hi I believe when you add carbon dioxide to water it will undergo hydrolysis to form carbonic acid CO2 + H20 <=>H2CO3 But i believe the CO2 is only weakly soluble so what happens to the rest of the CO2 that doesn't undergo hydrolysis? Does it exist as a gas in the water? thanks

A Standord Solar Research Post about a new Solar Membrane Panel, flexible for a wide variety of uses, (clothing rechargers anyone?), offered that the panel design includes deposition of Carbon atoms extracted from Methane. My concept went to extracting Carbon Atoms from Carbon Dioxide and...

Evolution of Carbon dioxide from Sodium bicarbonate and potassium hydroxide??! Hi!:smile: Here’s a question my teacher asked me to solve about evolution of carbon dioxide, We know that carbon dioxide is obtained by the action pf dilute acids on any metallic carbonate or bicarbonate e.g...

Does the Carbon in a hydrocarbon do anything for combustion?

What are the known or suggested effects of γ-radiation on carbon 60?

We have all been hearing plenty of things in the last decade about the development of carbon free cars. Although someone impractical right now, it is certainly doable. However, I have not really heard anything about alternative fuels for aircraft. It seems reasonable to expect that we could...

How much carbon dioxide has Eyjafjallajokull pumped into the atmosphere during the present eruption, compared to the amount not pumped in by aircraft during the recent "no fly" period in Europe?

So today my Math teacher and I got into a discussion about Carbon Dating and exponential decay. The book gave one equation and I (thinking back to chemistry) got another. They both had the same answer (which was great, my teacher was proud) but we could not figure out why. Here it is: 4...

Homework Statement Consider the CO2 molecule as a system made of a central mass m_2 connected by equal springs of spring constant k to two masses m_1 and m_3 a) set up and solve the equations for the two normal modes in which the masses oscillate along the line joining their centers (the...

Homework Statement An organ pipe is blown with carbon dioxide and produces waves 2 ft long and a note with a frequency if 350 Hz. What is the velocity of sound in carbon dioxide? How do you account for the fact that this is not the same as the velocity in air? Homework Equations...

Is the preponderance of carbon compounds due primarily to their biological origin?

Term Symbol for Carbon Total Angular Momentum 1. Write the term symnbols for carbon atom He2s22p2 which has two equivalent p electrons taking into account the Pauli exclusion principle. 2... 3. Since the carbon has two equivalent p-electrons, we know the l1=1 and that l2=1 as well. Also the...

Homework Statement At what distance from a carbon nucleus is the electric potential 2.1 V? Carbon atoms have 6 electrons in the atomic shell. Homework Equations v= K Q / r^2 OR K Q / r (NOT SURE) The Attempt at a Solution use voltage potential for point charge Using either v= K Q / r^2...

Homework Statement Consider a neutral carbon atom that has six electrons orbiting the nucleus. Suppose that five of the electrons are in their lowest states,but the sixth is in a very high state. Why might the energy levels for the outermost electron be similar to those for the single...

I've been wondering recently about the air quality in cities. Suppose all cars/transport methods were to go electric or clean (electric cars etc...) how much would air quality improve by? In other words what % of the nitrous oxide and carbon dioxide emissions are mobile sources responsible for...

any papers/ articles on carbon fibre?? hey I'm looking to do a study into the acoustic properties of carbon fibre but haven't been able to come across any current papers dealing specifically with this topic. does anyone know of any journals that have had published articles or better still...

Homework Statement If you were to count the number of carbon atoms at the rate of four each second, how long would it take you to count 6.0 grams of Carbon atoms? Homework Equations ---- The Attempt at a Solution 6.0 g Carbon x [1 mole carbon atom / (6.02 x 10^23 grams )] = 9.97x10^-24...

In C1OOH-C2H(OH)-C3H(OH)-C4H(OH)-C5OOH, is C3 stereocentre? >>Will it make any difference if I use the term 'stereogenic carbon' in place of 'stereocentre'?? Please, explain.

...The superposition of two states?... When I send a massive, classical chunk of carbonous stuff through a double slit, you can't expect me to believe that that chunk will magically turn into two equally massive chunks and do its constructive/destructive interfering, yet this is exactly what...

Hi All Hope this is the right forum, I am looking for an applied approach! I am interested in modelling the behaviour of CO2 powered rocket cars. These small models are powered by releasing pressurised carbon dioxide from a “sparklet” cylinder. The model cars race along 24 metre long...

According to a new book http://news.yahoo.com/s/afp/20091220/sc_afp/lifestyleclimatewarminganimalsfood This makes me wonder how much just the overpopulation of humans contributes to "global warming". Has anyone ever done the calculations? I've heard that 2 billion humans is the ideal...

http://airs.jpl.nasa.gov/AIRS_CO2_Data/AIRS_and_CO2/" I'm not sure about the long term analysis will work out, but it looks to me like the Atmospheric Infrared Sounder (AIRS) instrument is providing fundamental data about how our climate works.

Homework Statement In normal breathing conditions approximatly 5% of each exhaled breath is carbon dioxide. Given this informartion and neglecting any difference in water-vapor content estimate the typical difference in mass between an inhaled breath and an exhaled breath. assume one lungs...

Hello, I've read that metal film resistors are better than carbon film because they're resistance remains constant even when they heat up from being soldered. And I know they're suppose to be more precise with a 1% variance instead of 5% of the carbon films. I know capacitors go bad - do...

If carbon has the highest melting point of any of our known elements , then how do they melt it , the only thing I could think of is containing it in a magnetic field and maybe using like an electric arc furnace.

I am just wondering if pure carbon and graphite have the same resistivity? Resistivity for pure carbon = 3.5 x 10^-3Ωm:frown:

Hey guys, I'm researching single walled carbon nanotubes and I am trying to find out how much approx. Resistance there is in a pile of ~50nm long metallic SWCNT's piled on top of each other to form a line (think laying gunpowder for a fuse...). I'm perplexed because SWCNT's at the proper size...

Homework Statement The total mass of C contained in all fossil fuels burned from 1750 to 2000 is estimated as 2.77 x 1014 kg C. The amount of C released as CO2 from agricultural expansion and deforestation during the same period is estimated as 1.31 x 1014 kg C. The concentration of CO2...

An interesting book not so much about global warming but alternate energy and an analysis of the numbers behind it - from a physicist. The book is now available as a free download from http://www.withouthotair.com/ Ignore the physicist grade graphic design of the website - the book is much...

Homework Statement Calculate what mass of carbon you would need to reduce 15.9g of copper(II) oxide to copper by the reaction: CuO(s) + C(s) \rightarrow Cu(s) + CO(s) Homework Equations n = m / ar (number of moles = mass / relative atomic mass) If you know any more, it would be really...

Hi, I am doing an experiment involving activated carbon and I need to know if activated carbon has a high level of conductivity. I've searched the internet but without results. in addition, if the Active carbon can be made to be or is conductive, does the immense internal surface area still...

Hi friends, I've calculated the transmission spectrum of ideal carbon nanotubes for various applied voltages on them. I obtained the transmission spectra shown below for various bias voltages. However, I could not interpret why the transmission spectra changes so much with the bias voltage...

http://www.ucar.edu/news/releases/2009/arctic2k.jsp The associated albedo flip will amplify the warming.

I am not sure how to approach this problem. If you have a carbon steel pipe that is being heated on one end at a constant temperature of 1500C. Can you figure out how much distance in pipe will it require before it cools to 790C? The thermal conductivity of Carbon steel is 54 W/mk. Another...

I am doing research into an internal corrosion/erosion problem on a methanol pipework processing line. The pipe is made out of carbon steel and I am looking at replacing it with a duplex steel like Inconel 625 or HASTELLOY. Does anyone know how I could go about working out the costs involved so...

I have been interested in atmospheric CO2 variance on geological time scales for sometime. There are multiple paradoxes associated with trying to explain what could cause massive cyclic rapid CO2 changes in the atmosphere. There appears to be multiple fundamental errors in terms of what is the...

Homework Statement A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 g of the compound produced 0.213 g CO2 and 0.0310 g H2O. In another experiment, it is found that 0.103 g of the compound produces 0.0230 g NH3. What is the empirical formula of the compound...

Homework Statement A carbon sample taken from the bone of a saber tooth tiger emits 1 beta emission a minute. A carbon sample of the same size taken from a frest piece of bone emits 16 beta emissions a minute. How long ago did the saber tooth tiger live? How can i do this? Homework...

I was reading a chemistry book and found something that doesn't seem right to me. Read the underlined part. http://img139.imageshack.us/img139/6192/carbonz.jpg Isn't that incorrect? Doesn't it have two unpaired valence electrons instead of four?

When the hydrogens/protons are removed, leaving C-, can someone please tell me what and why the SP orbitals of these two carbons are? http://img30.imageshack.us/img30/5333/40529044.jpg Thanks.