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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.

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.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 ...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. ... For questions that have to do with chemistry, chemical reactions be they biological or artificial, or the industrial ...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.Pura Vida Bracelets have become a popular accessory among fashionistas and trendsetters. These unique handmade bracelets are not only stylish but also support artisans in Costa Rica. If you’re wondering how to style and stack Pura Vida Brac...

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...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. Stack TV is a popular streaming service in Canada that offers a wide range of channels and programming options. Whether you’re a sports enthusiast, a fan of drama series, or someone who enjoys watching the latest movies, Stack TV has someth...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.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.Newest 'chemistry' Questions - Academia Stack Exchange Questions tagged [chemistry] Ask Question On standards or conventions specific to chemistry as an academic discipline, and programs that lead to a degree in this field. For regular chemistry questions, visit our sister site Chemistry Stack Exchange. Learn more… Top users Synonyms 81 questionsFeb 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.

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. Sign up to join this community 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.). Avogadro's law states that. equal volumes of all gases, at the same temperature and pressure, have the same number of molecules. More exactly, it also includes single atoms, e.g. for a case of noble gases, due the way how IUPAC defines a molecule. But remember the Avogadro law implies ideal gases, similarly as the Gay-Lussac's law, Boyle's law ...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.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.

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Redox titrations : Oxidation of metallic Iron by Potassium Dichromate. 0.31 g of an alloy of Fe + Cu was dissolved in excess of dilute H X 2 S O X 4 and the solution was made upto 100 ml. 20 ml of this solution required 3 ml of N 10 K X 2 C r X 2 O X 7 solution ... inorganic-chemistry. physical-chemistry. redox. Stack Exchange. log in. users (54) rooms (33) faq; Rooms. site all 2 events. ... Stack Overflow en español. Chat de la comunidad de Stackoverflow en español. A veces charlamos sobre temas de programación, discutimos preguntas y/o respuestas, hablamos de tecnología y otras cosas. Habla, convive, conversa, responde, pregunta, pero siempre ...The expansion upon freezing comes from the fact that water crystallizes into an open hexagonal form. This hexagonal lattice contains more space than the liquid state. Share. Cite. Improve this answer. Follow. answered May 13, 2015 at …Here is how I understand it, armed with the new knowledge contained within the posts above: In the phosphate ion we have a central Phosphorus atom, with five valence electrons. This is bonded to four oxygen atoms, which have six valence electrons. Five P electrons plus 4 times 6 O electrons gives 29 electrons. From chemistry stack exchange, an answer contributed by user R.M.: SMARTS is deliberately designed to be a superset of SMILES. That is, any valid SMILES depiction should also be a valid SMARTS query, one that will retrieve the very structure that the SMILES string depicts. Except, that last clause isn't true. Try matching tritium against itself.1. Today I stumbled across a website which defined the titration of weak acid and strong base as the following: "The titration of a weak acid with a strong base involves the direct transfer of protons from the weak acid to the hydoxide ion. The reaction of the weak acid, acetic acid, with a strong base, NaOH, can be seen below.

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 ... community is growing. Stack Overflow and the Stack Exchange network help people find the answers they need, when they need them. Comprising 173 Q&A communities, including Stack Overflow, over 100 million people visit every month to ask questions, learn, and share technical knowledge. Our products and tools empower people to find what they need ...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 ...Oct 12, 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. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, ... Chemistry studies very specific things: the phenomena in which atoms in molecules reorganize into different molecules (reactions) and the structure of these molecules as an organized collection ...5. Hyperconjugation is the interaction between adjacent orbital (empty p p for cation, π π for alkene) with σ σ bond, while common conjugation is between adjacent orbital and π π bond. As one example, one reason why more alkyl substituted alkenes are more stable than less substituted ones is because more alkyl groups provide more ...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.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.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.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.Addendum: The process is not a Robinson annulation, which involves an initial Michael addition followed by an aldol condensation. The latter reaction includes the transformation 3 → → 8. The transformation 1 → → 3 may described as a retro -aldol reaction. You may want to see the formation of mesitylene (1,3,5-trimethylbenzene) from ...

Chemistry Stack Exchange is a platform where you can ask and answer questions on various topics related to chemistry, such as reactions, equilibrium, thermodynamics, and more. You can also browse the questions by tags, votes, and views, or ask your own questions.

Welcome to Physics Stack Exchange. Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics and astronomy. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about ...The negative hyperconjugation is a type of resonance effect where there is a donation of electron density from a filled π- or p-orbital to a neighboring σ*-orbital. It does not occur in your molecules. According to me, while comparing acidic strength, we should remove H X + from both the compounds, hence we get C F X 3 − O X − and C C l X ...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.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.1. I do not know any chemistry-for-physicists textbook, but Chemistry: The Central Science is a good textbook that gives a general picture of chemistry. I do not know what do you mean by " that takes advantage of thermodynamics, statistical mechanics, and quantum mechanics ". Share. Cite.Jan 20, 2014 · FeX2+ F e X 2 + ion containing metal surfaces, rust, drinking water, blood etc., but also copper and brass, give rise to a similar odor on contact with the skin. The human ability to detect this odor is probably a result of the evolutionarily developed but largely dormant ability to smell blood (“blood scent”). Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite.For those who may be interested and looking for a list of 'Known (LaTeX) Chemistry Packages', there is an excellent, albeit a bit dated by internet standards (appears to be ~9 years old) summary of chemistry related LaTeX packages: "This is intended to be a complete list of chemistry related LaTeX packages. Still — nobody is perfect.

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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 Temperature on pH of Water. The Kw K w is a function of temperature. It is 10−14 10 − 14 at 25 ∘C 25 ∘ C. When the temperature is 50 ∘C 50 ∘ C, the Kw K w can be calculated to be somewhere around 10−12 10 − 12 using Vant Hoff's equation, but this is so weird.Collision theory postulates that particles only initiate a transformation when they have enough energy. This is called activation energy and denoted by Ea E a. Maxwell-Boltzmann distribution. dNv N = 4π( m 2πkbT)3/2 v2 exp(− mv2 2kbT)dv (2) (2) d N v N = 4 π ( m 2 π k b T) 3 / 2 v 2 exp ( − m v 2 2 k b T) d v.Feb 10, 2014 · 5. Hyperconjugation is the interaction between adjacent orbital (empty p p for cation, π π for alkene) with σ σ bond, while common conjugation is between adjacent orbital and π π bond. As one example, one reason why more alkyl substituted alkenes are more stable than less substituted ones is because more alkyl groups provide more ... 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 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 ...Find the latest and most popular questions about chemistry as an academic discipline and programs. Browse topics such as admissions, grading, publications, funding, and more.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 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.That is, for core electrons in gold, the electrons are traveling at a significant fraction of the speed of light ( e.g., ~58% for Au 1s electrons). This contracts the Bohr radius of the 1s electrons by ~22%. Source: Wikipedia. This also contracts the size of other orbitals, including the 6s. The absorption you see is a 5d → 6s transition.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.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.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 ... I'm currently learning chemistry for the first time, and loving it. I have a reasonably good physics and maths background ...Applications of stacks, including function calling, implement discipline to a system. A stack is a special type of data structure that can be viewed as a linear structure acting like a physical stack or pile.Chemistry Stack Exchange. Q&A for scientists, academics, teachers, and students in the field of chemistry (104,769 total users) Oct 22, 2023 - Oct 22, 2023 ... These friendly reputation leagues are an informal way of tracking your reputation within the community on a particular Stack Exchange. Reputation is capped at 200 per day, ...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 ...1. Task: Explain the reaction mechanism of 1,4-Dioxane in terms of how you get peroxides. Start here with the autoxidation with one radical X. My explanation: in the first step 1,4 Dioxan reacts with Dioxygen, so one gets an initiatorradical and and HOO* (* symbolises here a free electron, a radical). In the second step the initiatorradical ...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. Chemistry stack exchange, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]