Chemistry stack exchange.

Stack Exchange Q&A communities are different. Here's how: Expert communities. Each of our 182 communities is built by people passionate about a focused topic. The right answer. Right on top. Experts like you can vote on posts, so the most helpful answers are easy to find. Share knowledge. Earn trust.Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Visit Stack Exchange ... In a comment on the question I previously asked in Chemistry Stack Exchange, I was told that these other …Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.The recipe for the plastics-from-starch uses starch, glycerol, acetic acid (the CX2HX4OX2 C X 2 H X 4 O X 2 in your equation) and water as a solvent. (They do not add lactic acid, the CX3HX8OX3 C X 3 H X 8 O X 3 in your equation, but lactic acid can be produced by hydrolysis of the starch.) With the starch-acetic acid-glycerol recipe, you do ...

I've attached a figure to show the dihedral angles. Hope this helps. Part of a peptide chain. The four atoms defining the $\psi$ (N to N) and $\phi$ (CO to CO) torsion angles are shown on the right. As these chains are drawn as if completely extended, the angles are $180^\text{o}$.When the main chain atoms are eclipsed, the angles are zero.

Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.Need for AINR-based simulations (vs. laboratory experimentation) The Results section of this paper related to ab initio molecular dynamics states that "16 HX2O H X 2 O and 15 HCN H C N molecules were taken together, and the system was allowed to evolve for 750 ... computational-chemistry. ab-initio.

A stack of 100 dollar bills is approximately 0.43 inches thick. Every paper bill in the United States is 0.0043 inches thick, so 100 bills together is 0.43 inches. Each bill is also 2.61 inches by 6.41 inches, making the square area of a bi...Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, ... Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up.Jun 7, 2015 · Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations. Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.

I was looking for the pKa p K a of imidazole and found this pKa p K a table [1]: Compound Imidazolium 2-Aminoimidazolium 1-Methyl-2-aminoimidazolium 4,5-Dimethyl-2-aminoimidazolium pKa 7.38 8.46 8.65 9.21 Compound p K a Imidazolium 7.38 2-Aminoimidazolium 8.46 1-Methyl-2-aminoimidazolium 8.65 4,5-Dimethyl-2-aminoimidazolium 9.21.

Feb 25, 2023 · Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.

So the theoretical, or stoichiometric ratio of air to fuel is 1740/114 or about 15. Most motor fuels are not pure octane. The additives complicate the math a bit, but the stoichiometric ratio is around 14 for many fuels. The equivalence ratio is just the actual air-to-fuel ratio divided by the theoretical.As a premium clothing brand, Peter Millar has made a name for itself in the world of luxury fashion. However, with so many competitors on the market, it can be difficult to know whether this brand is worth the investment.It is an ångström, a unit of length commonly used in chemistry to measure things like atomic radii and bond lengths. Although not an official SI unit, it has a simple relationship to the metric units of length: 1ångström = 1Å =10−10 m = 0.1nm = 100pm. 1 å n g s t r ö m = 1 Å = 10 − 10 m = 0.1 n m = 100 p m. The angstrom was intended ...Are you considering subscribing to Hulu and wondering what channels are included in their lineup? With the rise of streaming services, it’s important to compare the channel offerings before making a decision.Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Visit Stack Exchange.Now, coming to indium oxide, the formula of this compound as stated here is InX2OX3 I n X 2 O X 3, which bears a resemblance to the formula of AlX2OX3 A l X 2 O X 3 and GaX2OX3 G a X 2 O X 3 which we stated above. So, I would expect this oxide to atleast have some amphoteric properties.

Compare, while providing an explanation, the thermal and electrical conductivity of graphite to that of diamond. Provided answer: Graphite conducts electricity (only across a layer) where as diamond does not. Diamond is better at transferring heat than graphite. Explanation: Diamond is covalent network solid of carbon atoms which are linked to ...Tools get rusty. It's one of the things they do best. But they don't have to stay rusty. The DIY experts at Stack Exchange offer a few solutions to keep your tools gleaming clean. Tools get rusty. It's one of the things they do best. But th...Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Visit Stack Exchange.Thanks for contributing an answer to Physics Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.The covalent bond is the electrostatic interaction between two atoms in the same molecule. Covalent bonds are much stronger than hydrogen bonds: the O−H O − H has a strength of 467 kJ/mol, while the hydrogen bond is usually between 4 to 40 kJ/mol. Just want to point out that there is a subtlety to the word "water":

May 16, 2012 · The AgX+ A g X + ion and the ClX− C l X − ion are close to the same size (with the silver ion being smaller), so they can approach each other quite closely. In silver nitrate, the NOX3X− N O X 3 X − ion is larger and does not allow as close an approach as the chloride ion, so the bond is weaker, easier to break up, and the salt is more ...

Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, ... Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up.Q&A for scientists, academics, teachers, and students in the field of chemistry Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Newest 'chemical-engineering' Questions - Engineering Stack Exchange. Questions tagged [chemical-engineering] Ask Question. Use this tag for questions within …Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.I have printed the model in HIPS and the support in PLA. I have put the 3D model in a ultrasonic cleaner in the solution with water and sodium hydroxide. (1 liter H2O + 200 grams NaOH) The PLA has dissolved after 3 hours with temperature 65° and 1 hour of ultrasonic sound. I attach a youtube link with a similar experiment.Stack Exchange. Want to start your own Stack Exchange Q&A site? Check out Area 51. Our friendly robots are waiting. We make Stack Overflow and 170+ other community-powered Q&A sites.I was looking for the pKa p K a of imidazole and found this pKa p K a table [1]: Compound Imidazolium 2-Aminoimidazolium 1-Methyl-2-aminoimidazolium 4,5-Dimethyl-2-aminoimidazolium pKa 7.38 8.46 8.65 9.21 Compound p K a Imidazolium 7.38 2-Aminoimidazolium 8.46 1-Methyl-2-aminoimidazolium 8.65 4,5-Dimethyl-2-aminoimidazolium 9.21.

Q&A for scientists, academics, teachers, and students in the field of chemistry Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.

Effect of impurities on melting point. This is a 10th-grade question. The melting point of a substance decreases with increase in presence of impurities in it. The melting point of ice decreases from 0 °C to -22 °C on mixing salt in it in proper proportion. That is why salt is added to make freezing mixtures to keep ice creams frozen.The key point in carbohydrate numbering is to look for the carbon which is an aldehyde or a ketone (the carbonyl carbon). This will be the end of the monosaccharide which is numbered lowest. For aldoses, this carbon would be carbon 1. For ketoses, it's the lowest number that can be reached in the linear, ring-open form (e.g. for fructose, it's 2).Dissolving of the ammonium chloride can also be thought as two separate processes, see equation (2 ′). NHX4Cl(s) [NHX4X + (g)] + [ClX − (g)] NHX4X + (aq) + ClX − (aq) Meaning that first we break up the ammonium chloride crystal structure and second we dissolve the bare ions. If we want to write that in single enthalpy terms, we can do ...Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.Q&A about the site for scientists, academics, teachers, and students in the field of chemistry Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up.Welcome to Chemistry Stack Exchange! To get you the best answer, we provide this guidance for first-time askers. Before you post, search the site to make sure your question hasn’t been answered. Follow our policies when asking homework-like questions (questions about problem sets, exam items, etc.).A closed system in chemistry refers to a type of a thermodynamic system in which mass is conserved inside the system but energy enters and leaves the system freely. When both energy and matter can be exchanged between the system and its sur...19. In chemistry ask "why" only after you ask "if". Given a sufficiently strong superacidic medium, H X 3 O X + can be protonated to H X 4 O X 2 +. Evidence for this reaction, by studying isotopic exchange in a H F + S b …Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Visit Stack Exchange. ... For questions that have to do with chemistry, chemical reactions be they biological or artificial, or the industrial ...

Yes , it is a scam . This has been discussed at National Association of Corrosion Engineers meetings for decades. The vendors have actually sold some to refineries; however they can never demonstrate good results in objective tests. The excuses the vendors find for the failures are a tribute to creative thinking. – blacksmith37.where δV = M(1/dl − 1/ds) δ V = M ( 1 / d l − 1 / d s) where M M is the molecular weight and d d the densities of liquid and solid. T1 T 1 and P1 P 1 are temperature and pressure at the triple point. Thus you have to iterate T1 T 1 and P1 P 1 by fitting (say by least squares) to the calculated curves to whatever data you have to find the ...A quick way to draw the structure of a molecule is to look up the SMILES description of the molecule on pubchem or another cheminformatics site. To give an example, the SMILES of caffeine is CN1C=NC2=C1C (=O)N (C (=O)N2C)C. Then, you can load this into a chemistry drawing program such as Chemdraw (commercial) or MarvinJS ( online demo) or ...131. This FAQ explains and gives examples how to typeset chemical equations, quantities and units, and mathematical expressions on Chemistry Stack Exchange (rather than posting pictures, which you can't edit or search). Refer to the table of contents below to find topics you need to format questions and answers. Instagram:https://instagram. soviet womanweather underground dallas 10 dayfluffy wand curl freetressconvoking wand poe Write down your question. Write your question in the Body box. Your question should be clear even without the title. (Especially, do not write your whole question in the title and then put "title says it all" in the body.) Write your question out in full; do not post a picture of the question or your handwritten notes. andrew wiggins height and weightthe different cultures Whereas in the pyridinium ion - pyridine case. we can't draw good resonance structures that stabilize the positive charge in the pyridinium ion - this makes pyridinium ion more acidic. Both factors operate in the same direction and tend to make the pyridinium ion (pKa = 5.5 p K a = 5.5) more acidic than the iminium ion (pKa p K a ∼ ∼ 9). Share. king's hawaiian menu Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.Thanks for contributing an answer to Chemistry Stack Exchange! Please be sure to answer the question. Provide details and share your research! But avoid … Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. Use MathJax to format equations.Chemistry Stack Exchange. Q&A for scientists, academics, teachers, and students in the field of chemistry. subscribe. preview. Computational Science Stack Exchange. Q&A for scientists using computers to solve scientific problems. subscribe. preview. Computer Science Stack Exchange.