Applied Chemistry

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Determine the number of atoms in 2.25 moles of nitrogen gas. I'm confused >.< Do I: 1) multiply 2.25 mol by 6.02 x 10^23 atoms or or 2) multiply 2.25 mol x 6.02 x 10^23 molcules x 2 atoms. or is it something else? Also, how do I do this problem? Calculate the mass of 3.01 x 10^23 formula units (ions) of Strontium hydroxide. Please help if you can. ~____~

Do chemists mix chemicles all day. Making up different compounds. And isn't a guy making moonshine a chemist?

Research Scientist - Watertown, MA I am assisting to recruit a Research Scientist and a Senior Research Scientist for a client in Watertown, MA. Here is more information: Their expertise focuses in areas such as transition metal catalysis, stereoselective synthesis, medicinal and combinatorial chemistry give us the power to discover and develop new chemical entities which hold the promise for tomorrows drugs. Primary Responsibilities: Strong synthetic knowledge and skills to carry out chemical research and development, to identify and to implement viable process for key intermediates and drug candidates to a kilo-lab and pilot-plant scale. Specific Assig…

So, I've been looking into difference cheeses and their pH levels For acid-set recipes, the use of critic acid seems very random. Some will use the powder, others will use lemon juice or vinegar; it is very random. With how varied my cheese curds have been, I have decided to look into pH related stuff. A citrate buffer is made of critic acid powder and sodium citrate, and of course water. Could I change the milk's pH level with the proper buffer? Thank you for your time and help.

This is a story originaly written by a chemistry student (and later, a worker) that describes the chemical accidents he has encountered in his career (some of them funny, others not so much). It was first posted in the chinese forum [baidu tieba], which has then been reprinted countless times on other forums. So I figured I could share this story with you english speakers, since I am a chinese but I also understand english quite well. still I may make some errors in grammar, so please forgive those. for credit purposes, this is the chinese post I decided to translate http://blog.sina.com.cn/s/blog_6e45082d0102vwqh.html So here we go. The first incident…

Hello fellow nerds and nerdettes, I have recently decided to take on a the task of surfactant synthesizing at home that is safe and helps to give a very good understating of emulsion. However, there are not many sources that I am able to find dealing with synthesis. I know that I could theoretically design it by showing mechanisms, but I would like to have a vast array of scientific community input and experience so as to design a synthesis that would would be the safest, and most logical means possible. To do this, I need the help of all your brilliant minds. So far, I have looked at saponification using sodium hydroxide (lye/caustic soda) and potassium hydroxide. I…

This may sound like a mediocre question but how do you know what the expected values and the experimental values are in an experiment? I am trying to calculate the percent error for an experiment we conducted in lab.

I cannot work out this 1H NMR spectra of d(+) carvone. The peaks have (from left to right) the relative intensities 1, 2, 5 and 6. This adds up to the 14 protons that carvone has, but apart from that I can't work out which peaks correspond to which proton environments. Thanks for any help.

2 Second Chemistry Question Trying to theoretically boil 1 L of water in a closed container at 90 degrees Celsius and using the correlating boiling pressure for water at this temperature. In order to find the size of the container I tried using the Ideal Gas Law with the following variables: V = solving for this. P = .697 atm n = 55.6 moles/liter R = .0821 (L*atm)/(mol*K) T = 363.15 K The result shows a volume of 2378.3 L needed to carry out this experiment. I believe I have made a mistake. Surely water could be boiled in a smaller vessel, right?

it would seem that Di-Ethyl Ether (ether) as used in "Cold Start" for engines is perfectly soluble in petrol/gasoline also. now since this is used in engines primarily to be sprayed directly intho the Air intake of the carbs to help start the engine on a cold day (rather than use the Choke, it says not to when using this stuff), what if it were mixed directly into the Fuel instead? for some reason I`ve done all I can with this new engine, but when it`s even a LITTLE BIT cold, it`s a real b!tch to start it`s great when it`s been running for about 5 mins, but requires several re-starts to get to that point. could making the actualy Fuel itself more "Flamable/v…

How many pounds of Sodium Hydroxide does it take to make 10 gallons of 50% Sodium Hydroxide solution?

I need to know if 90% nitric acid will dessolve my aluminum tubing. Does anyone have any experanice with strong HNO3 ?

Now for this experiment we don't need any fire, at all... HNO3 (Nitric acid) + H2O2 (Hydrogen Peroxide) = A very interesting chemical reaction When these two chemicals mix, they make a very violent hot temperature that will cool down after it looses all of it's energy after that violent chemical reaction... The color of the substance is grey and has a very 'jelly' look. I would not touch it if I were you. This experiment is interesting and you guys should try it too! It is fun and cool to watch! IAstroViz

ok, so im selling a book on ebay called "A LABORATORY CHEMISTRY". It was published in 1904. The book is very cool for any chemist but ive read it through. I understand that there is a thing against advertising, but i think people here would enjoy using this book. It is a good resource. Mods, if you feel that this is not appropriete (linking you to my ebay auction) please just delete the thread. Im postig this because some one here might want this book. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=2228&item=6966444224&rd=1&ssPageName=WDVW

Hello. Can we make a list of typical household and over-the-counter chemicals that are obtainable without "prescription' in supermarkets, hardware stores, but not from chemical specialty suppliers ? Like: Sodium bicarbonate Rubbing alcohol Acetic acid (vinegar) Turpentine Acetone Gasoline Kerosene Diesel Naphta Butane Sodium chloride (salt) Paint thinner (whatever it is) Sodium hipochlorite? (the water softener stuff) Epsom salt Borax Graphite (pencil leads) Oils Methylethilketone Cyanoacrylate Please add, rename properly and do corrections... Miguel

Advice on the best material/method to prevent condensation on plastic/glass at the lowest possible cost. New venture I'm looking at currently a refrigeration engineer. Any useful help will be rewarded in equity in the buisness if it develops to a production standard.

hey im making smokeboms for this stunt my friend is doing on his dirtbike, i have the actual bomb but the fuse is sadly lacking... it just wont burn down to the igniter. ive tried gunpowder coated string, potassium chlorate (and KClO3 + sulfur)coated string, KClO3 coated paper... and many others is there some secret to the perfect fuse? oh and btw i cant get like the green kind from fireworks, dont sell them here, only the weak SAS (safe and sane)kind with fuses too short for my use-i got to make them myself. Any suggestions?

Imagine a perfect steel cube in 2 halves with a tiny cavity in the center of it, enough to fit perfectly a quantity of explosive. these steel halfves are then bolted together perfectly, and the explosive is of a quantity not large enough to rupture the steel container or allow any gasses out. the products of detonation from this explosive X are Carbon Dioxide and Nitrogen, only. what will happen when to explosive X when triggered (I`ll avoid the term detonate as I`m uncertain if it will). I have many ideas in my head as to what will happen, ranging from detonation and liquification of the gasses, to compressing the inner cavity of the steel into a new subs…

What are they? Are they really classified as a crystal species? Is there any way to make one that wont dissolve when wet? Do any crystal like the ones grow at home happen in nature besides salt?

My geology instructor was discussing some basic chemistry in today's lecture and claimed that atoms by definition contain an equal number of neutrons and protons and that when the number of neutrons differ it's called an isotope. Now, unless I'm gravely mistaken, the number of neutrons has nothing to do with whether or not something is an atom, otherwise most hydrogen couldn't be classified as being an atom, etcetera. I'm also aware that an isotope is simply an atom of varying numbers of neutrons, regardless of whether or not that number is even with the number of protons in the molecule. This all did make me wonder though, is there a term for an isotope that has an equal…

We all know that solids, liquids and gasses are states of matter. i have two questions: 1. What exactly is plasma and is it a state of matter. I heard plasma was a 'soup' of electrons and atoms nucleus's. Is this correct. 2. In what state of matter is jelly classified as. The jelly that you eat.

I'm currently researching food coloring additives and their dangers. I've come across a couple that seem like there's no concrete evidence for just how dangerous they are, but we should still be scared of them anyway. I'm not the one for fearmongers, only facts. So, I would appreciate it if anyone came to my rescue and told me what they knew about popular color additives and even ones we don't use anymore.

Hey guys. I need your help...i'm stuck. In my free time i endulge in my hobby of restoring old japanese razors and cooking knives...it's a fun and rewarding way to give life back to quality instruments that can be used once again. I use japanese natural stones to polish them. I use them with tap water and a rubbing stone from the same piece of stone. A slurry(paste formed with water ) is raised on the surface of the stone with the rubbing stone. The razor or knife is honed in that paste on the surface of the stone. It is known that these stones bring out the steel pattern in hand forged carbon steel blades. I have researched a lot about steel…

is there a any chance about mix lime with a fertilizer to reduce the acidity of it ????