Chemistry

Hello, I am wondering, how can I calculate the formula of a particular series of binary compounds once I calculate the ratio of one element to the other one (which I hold constant)? Thanks.

I have to do a science fair soon and write up the procedure and background info.. I have been thinking of topics, but I don't know how to further develop them so that they could be more than just extractions or something of that sort. These are 3 topic choices that I could do a research project on... Caffeine Vitamin C I can do the extractions.. but from there, what can I do with caffeine extract, or Vit C extract that would make it be labeled a "Science Fair Project" or that I could further do research on. If anyone can help, or suggest topics to work on, that would be greatly appreciated.. I need ALOT of help. Thanks. Also, if something research-y ca…

how do you separate & calculate the percent composition of potassium chloride and sucrose?

What kid of reaction would these produce at room temperature? Should they be stored in proximity?

Can a material (or molecule) be denser than the elements that compose it? I notice that the element Carbon has a density of 2.267, while diamond (which is Carbon) has a density of about 3.5 It occurs to me, though, that 2.267 could be an average density of the different forms of Carbon... is this so?

I am a complete novice when it comes to chemistry (or science in general . I have a question that I'm hoping someone may be able to point me in the right direction. Please excuse the lack of knowlege when it comes to terms. This information is for the purpose of a development of a product that a associate of mine and I wanted to look into, so please bare my requirments below. I need to find out if anyone knows a way to take 2 or more small amounts of non-toxic ingidients(i.e. chemicals, baking soda, anything), that once mixed will give off a large amount of non toxic gasses/vapors for a period of roughly 2-5 minutes, the mixture of the chemicals however can …

Alright so I'm sure we've almost all heard about the glowing pickle. You apply a voltage across a pickle and it glows if the watts are high enough, generally this is with the house circuit. From what I've read this is due to the sodium in the pickle being excited by the electricity which is known as the Sodium-D line. So I'm wondering if this same principle could be demonstrated with the pickle juice itself. It pretty much boils down to me having a jar of pickle juice that I want to do something with.

How does pH affect growth of crystals?

Hi! I'm trying out crystal growing. How exactly do acids affect crystal growth even at the molecular level? Regards

Hello everyone, I am new to this site. I'm not a chemisty student, in fact, I'm not a student at all. I'm working on a project and wanted to incorporate this process into a product I'm trying to develop. Is there a way to control the heat source? I know that it can reach 130F. Is that the limit? Can it be liquified without boiling? Once the crystalization process is complete, is there a way to cause the opposite reaction that would get it back to its original liquid state? Please give me your thoughts. Thanks Brenda

The Solubility of barium hydroxide in water at 20 degrees C is 1.85g/100g Water. A solution is made up of 256 mg in 35.0 g of water. Is the solution saturated? If not, how much more needs to be added to make a saturated solution? This is what I have done so far: ?g of Ba(OH2)2=35.0g water x (1.85 g/100g)=.6475 g is needed to form a saturated solution. .6475-.256= .392g is needed to make is saturated. Is this right? Some of my classmates got conflicting answers. Thanks for the help!

Hi I have been researching carbon emissions and have found that they stay in the atmosphere for 70-130 years. Would it be possible to remove this carbon for re use? Has anyone been looking into it? I get all sorts of obscure sites when I try and search for this on the internet mostly returning me back to how past ice ages have ocurred - for example - The Moronic Inferno http://www.bbc.co.uk/dna/h2g2/A26089743 My question is would it be theoretically possible to take back the carbon present in the atmosphere resident for ages to reuse it as a fuel? Thanks Rob

I'm a bit confused about this. I've read a few wikipedia articles and chemistry sections on this, but I'm still confused. If you had a mole of carbon atoms and weighed it on a scale, what would you see? I guess what I should ask is what does a scale measure, weight or mass? If you measured that mole of carbon atoms, would the scale read 12 or would it read 12 x 9.8 ? If it reads 12, does that mean that the scale automatically divides out the 9.8 to get the mass?

Hello, are there any compressed gas experts about? I’ve a question regarding LPG gas stored in cylinders. What would happen if a 60ltr cylinder containing LPG was shot with a gun and pierced? Or, if the container was struck by an automobile and ruptured? Is it likely to cause much harm and damage? I’m having a debate with my OH&S rep about the likelihood of fatality caused by a rupture to a cylinder. Considering just how many gas containers there are in the world (BBQs, caravans, cars, etc). I’m assuming that the fatalities are very low, particularly when compared with something like automobile collisions that result in death. Cheers.

following the instructions here: http://seawhy.com/xlroch.html with the only difference that I started with sodium carbonate and didn`t have to make it. I seem to hit upon a problem, the Soln is like a syrup and is Not crystalising at all? has anyone here tried this before, and is what`s happening Normal? nowhere on the net that I can see does it even mention that the soln is Syrupy, the PH tests just fine also, I`m wondering if it`s in a metastable state?

I remember reading about electrolysis of water before learning about it in chemistry class during the school year, and now I want to try it. First off, what is a safe electrolyte for it? Also, since the quantity of products is determined by the charge transferred, (as in the current and low long the current is flowing) then what effect other than determining whether or not electrolysis occurs does the voltage have? As in, if the charge transferred is the same in one case where the voltage is barely above the cell potential and another case where the voltage is much higher than the cell potential, since the energy transferred will be much higher, where does that extra ener…

hey everyone... hmm.. i gotta do this project for my linear algebra class .. "of how is linear algebra used in your area of study or .. future occupation..." and i am actually a chemistry major.. so .. could anyone give me some advices of how does linear algebra applies on chemistry in anyway? Greatly appreciated !!!

I'm referring to chlorine in this case; I read something ridiculous on a web site about sucralose "having chlorine in it just like chlorine bleach" because IIRC sucralose takes a sucrose molecule and replaces some of the hydrogen atoms with chlorine atoms to eliminate the "sugar" effect, and I wanted to provide an analogy about other compounds that contain chlorine in their chemical formula but I'm not sure if sodium chloride makes for a good analogy... whoever made that site doesn't seem to be very chemically educated (given how they compared these substances on the basis of them having a common element) but I would like a list of harmless covalent compounds with chlorin…

It is possible to model the cell in terms of one variable, i.e., hydrogen bonding. To make this possible, hydrogen bonding needs to be revised. To build some background for this revision, consider the two bases Cl- and OH-. Both have one extra negative charge, but OH- is a stronger base. The reason this is so, is that charge alone is not sufficient to explain relative basicity. One also needs to include the affect of the magnetic fields around the atoms to get the entire electromagnetic affect. A magnetic field is generated by a charge in motion. Writing these anions, in the simple way above, does not give one a good feel for the fact that this extra negative charge …

Would someone like to teach me some of the basic concepts which have been confusing me since i was first introduced with Chemistry?

hi im new, and i hated science until 9th grade, when i had taken biology. next year i am taking chemistry and i was thinking of buying this chemistry set to become more familiar with it before school starts this year and i have no clue what i got myself into. But i was just gonna ask a few questions 1. how hard is chemistry? 2.is this the right set for me (as a beginner) http://www.hobbytron.com/ScienceChemistrySetsTH645014.html thanks all replies are appreciated

Can you use sound of any frequency or amplitude for example to induce a chemical reaction?

If you look at CO2, it is a linear molecule O=C=O, which can store and reflect energy in the atmosphere by its bending, vibration and rotation. It has been shown to have a significant impact on global warming. If we react CO2 with H2O we get H2CO3 or carbonic acid. One may notice that the former linear CO2 will change it bond angle from 180 to 120 degrees when it reacts with water and forms carbonic acid. As such, its degrees of freedom for storing energy is different. It can no longer rotate except as part of H2CO3, while it vibrational and bending energy levels are now also different and work in conjunction with the H2O aspect. The CO2 will now share its stored ene…

How does it work? When it does not work? Oily rag, on a corner, no ventilation, hot weather... What if not a rag, but a newspaper, or a soaked piece of wood with transmission fluid instead, or wet with vegetable oil, or not hot, or breezy ? Is there critical key conditions for this? Is it consistently reproducible under controlled conditions? Miguel

in an episode of CSI it says add 3 drops of gasoline,limeted oxygen supply and at 936 decrees f and BOOM! the bit i dont get is how to give it limeted oxygen supply, can someone help me please