Nounchemistry (countable and uncountable; plural chemistries)
From Wiktionary under the GNU Free Documentation License. Chemistry (the etymology of the word has been much disputed) is the science of matter and the changes it undergoes. The science of matter is also addressed by physics, but while physics takes a more general and fundamental approach, chemistry is more specialized, being concerned with the composition, behavior, structure, and properties of matter, as well as the changes it undergoes during chemical reactions. It is a physical science which studies of various atoms, molecules, crystals and other aggregates of matter whether in isolation or combination, which incorporates the concepts of energy and entropy in relation to the spontaneity of chemical processes. Disciplines within chemistry are traditionally grouped by the type of matter being studied or the kind of study. These include inorganic chemistry, the study of inorganic matter; organic chemistry, the study of organic (carbon based) matter; biochemistry, the study of substances found in biological organisms; physical chemistry, the study of chemical processes using physical concepts such as thermodynamics and quantum mechanics; and analytical chemistry, the analysis of material samples to gain an understanding of their chemical composition and structure. Many more specialized disciplines have emerged in recent years, e.g. neurochemistry the chemical study of the nervous system (see subdisciplines). From Wikipedia under the
GNU Free Documentation License CHEMIStry*? Q. what is [H3O] in 0.70M HCN? answer is 1.9x10^-5, how do you figure out? Asked by Harmony S - Thu Mar 6 15:50:22 2008 - - 2 Answers - 0 Comments A. You need Ka to solve it. My book (Zuhmdahl, 5th ed.) says it is 6.2 X 10^-10. HCN = H+ + CN- Let "X" equal [H+] and [CN-]. Ka = [H+][CN-] / [HCN] = 6.2 X 10^-10 X^2 / 0.70 = 6.2 X10^-10 X^2 = 4.34 X 10^-10 X = ( 4.34 X 10^-10)^0.5 X = 2.08 X 10^-5 So [H+] = [H3O+] = 2.08 X 10^-5 M The slight difference in answers is probably because your textbook has a different Ka value for HCN. Answered by Dennis M - Thu Mar 6 16:06:31 2008 What chemistry principles should one study in their spare time? Q. I understand that a broad and intricate knowledge of the basics are important, but I'm not at all sure what basics I should start with. My idea was to read through a general chemistry textbook, but it's turning out to be somewhat overwhelming. I'm looking to pursue a career in organic chemistry (organic chemistry textbooks are too specific and don't really allow for a broad understanding of the subject matter). I'm already taking chemistry courses at a university; the aim of this question, to restate, is to help me figure out where I should be concentrating in my spare time. Asked by Marshall - Tue Jun 23 20:41:21 2009 - - 2 Answers - 4 Comments A. I am an inorganic chemist. I have a colleague who is a biological chemist. I once asked him, "What, besides biological chemistry, do you think is most important for your students to understand?" His answer? Physical chemistry. Besides inorganic chemistry, that's my answer too. Thermodynamics, kinetics, bonding. Not so much at the level of being able to derive thermodynamic relationships with partial derivatives, but having a sort of honors-level freshman chemistry understanding. Know order-of-magnitude numbers! How strong are typical bonds? How much energy is kT (or RT on a per mole basis). What is the energy range of visible light? Infrared radiation? NMR frequencies? What are typical bond lengths? etc... You'd be… [cont.] Answered by Timothy - Tue Jun 23 21:10:31 2009 What can I do with a chemistry major that will not require animal testing?
Q. I'd like to be a chemistry major but I want to go into a career that will not require animal testing. I also don't want to do it in college. I just love chemistry. What options do I have? Asked by D - Tue Jul 27 22:11:41 2010 - - 1 Answers - 0 Comments A. There are so many answers to what you could do that there isn't room to list them here. There are very few jobs that require animal testing. The vast majority all related to the health field, and biology...not chemistry. The only chemistry animal testing job I can think of would be cosmetic design. The only "animal testing" I knew about in college was with frogs in a biology class. You really don't need to worry about animal testing if you go into chemistry. With chemistry, you could work in industry...say paints for cars. Refineries. Power plants. Rocket fuel. Bio fuels. batteries. There are a huge number of environmental jobs, where you'd basically be using chemistry to protect the environment(and animals that live there). … [cont.] Answered by Nathan Parker - Wed Jul 28 04:11:17 2010 From Yahoo Answer Search: "chemistry"  prnewswire.com Thu, 26 Aug 2010 13:03:12 GMT+00:00 Tool ChemDraw Into Digital ... PR Newswire (press release) For students of organic chemistry , however, practicing this essential skill is much more complicated, as the limitations of electronic homework platforms ...  thenorthwestern.com Thu, 26 Aug 2010 09:20:32 GMT+00:00 key for Wildcats Oshkosh Northwestern Oshkosh West coach Ken Levine may be a math teacher, but he also knows a thing or two about chemistry . ...  nature.com Thu, 26 Aug 2010 21:09:54 GMT+00:00 Nature.com The project duration is three years and the essential qualification and job descriptions are as follows Qualifications: M.Sc. in Chemistry (Organic). ... From Google News Search: "chemistry"  chemistry.library.wisc.edu 474px x 600px | 890.30kB [source page] Map Click map to go to an interactive campus map A map of this and other campus libraries can be found at the campus libraries map page  i215.photobucket.com 640px x 1024px | 554.70kB [source page] http i7 photobucket com albums y29 enAckles14 jpg http i7 photobucket com albums y29 enAckles18 jpg http i215 photobucket com albums c chemistry jpg From Yahoo Image Search: "chemistry"  higheredjobs.com (HigherEdJobs.com) ue, 24 Aug 2010 19:27:36 GM A tenure-track Assistant Professor position in Physical . Chemistry. to begin August 2011. The successful candidate will teach lecture and laboratory courses in physical and biophysical . chemistry. as well as in general . chemistry. as needed, ... From Google Blog Search: "chemistry"  casx.ou.edu Thu, 04 Feb 2010 03:36:08 PST Organic II 012710, a video episode of Organic Chemistry II @ Videocast.com Organic II 012510 Posted: - - : :08 Spectroscopy, MS, Introduction to ... casx.ou.edu.  youtube.com Wed, 28 Nov 2007 11:28:28 PST A demonstration of several distillation techniques (simple distillation, fractional distillation and steam distillation) used in Organic Chemistry ... youtube.com.  youtube.com Fri, 02 May 2008 21:18:25 PDT Music video by Blip Boutique featuring visual programming by Aaron Koblin with editing and visual effects by Roger Scott.. youtube.com. From Google Video Search: "chemistry" |
