- published: 12 Dec 2011
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A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulas can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than are chemical names and structural formulas.
The simplest types of chemical formulas are called empirical formulas, which use letters and numbers indicating the numerical proportions of atoms of each type. Molecular formulas indicate the simple numbers of each type of atom in a molecule, with no information on structure. For example, the empirical formula for glucose is CH_{2}O (twice as many hydrogen atoms as carbon and oxygen), while its molecular formula is C_{6}H_{12}O_{6} (12 hydrogen atoms, six carbon and oxygen atoms).
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In science, a formula is a concise way of expressing information symbolically as in a mathematical or chemical formula. The informal use of the term formula in science refers to the general construct of a relationship between given quantities. The plural of formula can be spelled either as formulas or formulae (from the original Latin).
In mathematics, a formula is an entity constructed using the symbols and formation rules of a given logical language. For example, determining the volume of a sphere requires a significant amount of integral calculus or its geometrical analogue, the method of exhaustion; but, having done this once in terms of some parameter (the radius for example), mathematicians have produced a formula to describe the volume: This particular formula is:
Having obtained this result, and knowing the radius of any sphere in question, we can quickly and easily determine its volume. Note that the volume V and the radius r are expressed as single letters instead of words or phrases. This convention, while less important in a relatively simple formula, means that mathematicians can more quickly manipulate larger and more complex formulas. Mathematical formulas are often algebraic, closed form, and/or analytical.
In elementary algebra, the quadratic formula is the solution of the quadratic equation. There are other ways to solve the quadratic equation instead of using the quadratic formula, such as factoring, completing the square, or graphing. Using the quadratic formula is often the most convenient way.
The general quadratic equation is
Here x represents an unknown, while a, b, and c are constants with a not equal to 0. One can verify that the quadratic formula satisfies the quadratic equation, by inserting the former into the latter. Each of the solutions given by the quadratic formula is called a root of the quadratic equation.
Geometrically, these roots represent the x values at which any parabola, explicitly given as y = ax^{2} + bx + c, crosses the x-axis. As well as being a formula that will yield the zeros of any parabola, the quadratic equation will give the axis of symmetry of the parabola, and it can be used to immediately determine how many zeros to expect the parabola to have.
A general officer is an officer of high rank in the army, and in some nations' air forces or marines.
The term "general" is used in two ways: as the generic title for all grades of general officer and as a specific rank. It originates in the 16th century, as a shortening of captain general, which rank was taken from Middle French capitaine général. The adjective general had been affixed to officer designations since the late medieval period to indicate relative superiority or an extended jurisdiction.
Today, the title of "General" is known in some countries as a four-star rank. However different countries use different systems of stars for senior ranks. It has a NATO code of OF-9 and is the highest rank currently in use in a number of armies.
The various grades of general officer are at the top of the military rank structure. Lower-ranking officers in land-centric military forces are typically known as field officers or field-grade officers, and below them are company-grade officers.
CLASS 10 | GENERAL FORMULA OF ALKANE, ALKENE, ALKYNE | TX ACADEMY
Hola, en este video les dejo la formula general expliucada de una forma super sencilla y moderna, espero y les sirva, recuerden que pueden ver el video las veces que sea necesario para entender el tema. Sígueme en mis redes sociales!! Contacto/Negocios/Prensa: luisdanielcarreonbaylon@gmail.comFACEBOOK: https://www.facebook.com/carrrrreon?r...TWITTER: https://twitter.com/ProfeCarreon Sígueme en mis círculos: https://plus.google.com/u/0/+LuisDani... SUSCRIBETE!!!
► My Sequences & Series course: https://www.kristakingmath.com/sequences-and-series-course Learn how to use a list of the first several terms of the sequence to find a formula for the general term of the sequence, a_n ● ● ● GET EXTRA HELP ● ● ● If you could use some extra help with your math class, then check out Krista’s website // http://www.kristakingmath.com ● ● ● CONNECT WITH KRISTA ● ● ● Hi, I’m Krista! I make math courses to keep you from banging your head against the wall. ;) Math class was always so frustrating for me. I’d go to a class, spend hours on homework, and three days later have an “Ah-ha!” moment about how the problems worked that could have slashed my homework time in half. I’d think, “WHY didn’t my teacher just tell me this in the first place?!” So I started tut...
Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Arithmetic Sequences: Finding a General Formula Given Two Terms. In this video, we have values for a_21 and a_51 and we have to find the general formula for the arithmetic sequence: a_n.
Explains the 'general form' of quadratic equations, and how that is used to understand the quadratic formula
Alkanes, alkenes ,alkynes, alcohols, aldehydes, ketones, carboxylic acids.
This algebra video tutorial explains how to write a general formula of an arithmetic sequence. It explains how to see the patterns in to the write a general equation for the sequence. Most of the sequences are arithmetic sequences. Examples include fractions and terms with alternating signs. This video provides the general formula for the nth term of an arithmetic sequence. This tutorial contains plenty of examples and practice problems. New Algebra Playlist: https://www.youtube.com/watch?v=nTn9gVqRfKY&list=PL0o_zxa4K1BUeF2o-MlNpbRiS-oE2Kn6J&index=2 Access to Premium Videos: https://www.patreon.com/MathScienceTutor https://www.facebook.com/MathScienceTutoring/
Álgebra - Capítulo 10 - Ecuaciones cuadráticas (playlist): https://www.youtube.com/playlist?list=PLEwR-RTQiRPVQdDRnLLmUtrE5pPA8IK_b SUSCRÍBETE: http://bit.ly/VN7586 (NO OLVIDES DAR UN ¨LIKE¨) VISITA: http://math2me.com FB: http://bit.ly/FBmath2me G+: http://google.com/+math2me Twitter: http://bit.ly/14ql1b7 (Video explicado por José Andalón) Help us caption & translate this video! http://amara.org/v/FPMg/
Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Arithmetic Sequences: A Formula for the ' n - th ' Term. In this video, I derive the formula to find the 'n-th' term of a sequence by considering an example. I then use the formula to do a few different problems.
Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Many people know how to use the quadratic formula to find solutions to quadratic equations... but where does it come from?? In this video, I show how to derive the quadratic formula! For more free videos, visit http://PatrickJMT.com
For more videos and interactive applets, please visit http://www.MathVillage.info Learn how to write a formula for finding the nth term when given an arithmetic sequence.
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Watch all my videos at www.freesciencelessons.co.uk This video is for the new GCSE specifications (levels 1-9) for all exam boards. In this video, we look at how to interpret a chemical formula. This is very important for the rest of the GCSE Chemistry course.
The general term of a binomial expansion, also known as the (r+1)th term. The general term formula allows you to find a specific term inside a binomial expansion without the need to fully expand the series. It is useful to find a specific term with a specific power inside a binomial expansion. For example find the term with x^3 in (x^2 + 1/2x)^9. If you like what you see, please subscribe to this channel! http://www.youtube.com/subscription_center?add_user=numberskill For more videos, please visit http://www.numberskill.com/board-casts-on-youtube/#Bookmark Like us on Facebook http://www.facebook.com/garyang.math Follow us on Google+ https://plus.google.com/117074002101017934426/posts
Link for interactive ellipse derivation! https://www.dropbox.com/s/1gbhr7bycy7h61v/interactive%20ellipse.swf.html Buy my app! https://itunes.apple.com/us/app/euclids-elements-book-1/id717831746?ls=1&mt=8 visit my website http://www.pythagoreanmath.com In this video we derive the equation of an ellipse. 45 likes!!!
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This video explains how to find the general formula for a sequence in fraction form. (Arithmetic/Geometric) http://mathispower4u.com
Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Geometric Sequences: A Formula for the' n - th ' Term. In this video, I derive the formula to find the 'n-th' term of a geometric sequence by considering an example. I then use the formula to find another term of the sequence.
We will talk about what empirical formula and molecular formula are, how they are different, and we'll learn how to write the empirical formula for a compound when you are given the molecular formula. Molecular formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. If a compound's molecular formula cannot be reduced any more, then the empirical formula is the same as the molecular formula. Also, many compounds with different molecular formula have the same empirical formula.
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This general chemistry video tutorial provides a list of equations or a formula cheat sheet that you need to know in order to do well in your chemistry course. This study guide video provides a nice review of the concepts that goes with each equation to help you for your upcoming final exam. Here is a list of topics: 1. How To Determine The Number of Protons, Neutrons, and Electrons Inside an atom or ion using the Atomic Number, Mass Number and Charge. 2. How To Calculate Average Atomic Mass and Relative Percent Abundance of Isotopes 3. How To Convert Grams To Moles - Stoichiometry 4. How To Determine The Molar Mass or Molecular Weight of a Compound 5. Avogadro's Number - Moles to Particles, Atoms, or Molecules 6. Mass Percent Formula - How To Determine The Percent Composition o...
ilmkidunya.com has brought to you Lecture of Sibghat Ullah on "9th Class Chemistry Chapter 1 Fundamentals of Chemistry . Topic 1.2.4 Chemical Formula". In this video following sub topics have been taught: - Types of Chemical formula For more videos of Sibghat Ullah visit https://www.ilmkidunya.com/study , https://www.instutor.com This lecture is specially recorded for students of 9th class, 9th class from all Punjab Boards and is based on the current curriculum of study for Chemistry book. All these lectures are conducted in Urdu/English medium to facilitate Pakistani students.
General Relativity & curved space time: Visualization of Christoffel symbols, Riemann curvature tensor, and all the terms in Einstein's Field Equations. My Patreon page is at https://www.patreon.com/EugeneK
This chemistry video tutorial shows you how to determine the empirical formula from percent composition by mass in grams. This video also shows you how to determine the molecular formula from the empirical formula using the combustion analysis technique of a compound. This video contains plenty of examples and practice problems that can help you on your next upcoming worksheet assignment / quiz. Here is a list of topics: 1. Empirical Formula - Lowest Whole Number Ratio 2. Finding the empirical formula from mass in grams 3. Determining the empirical formula using percent composition by mass 4. Calculating Molecular Formula From Empirical Formula Using Molar Mass 5. Combustion Analysis - Compound with 2 elements - Carbon & Hydrogen 6. Empirical Formula From Combustion Analysis - 3 E...
This channel is managed by up and coming UK maths teachers. Videos designed for the site by Steve Blades, retired Youtuber and owner of m4ths.com to assist learning in UK classrooms. Designed for the Edexcel spec but applicable to AQA, OCR,MEI and WJEC.
Einstein's Field Equations for General Relativity - including the Metric Tensor, Christoffel symbols, Ricci Cuvature Tensor, Curvature Scalar, Stress Energy Momentum Tensor and Cosmological Constant.
This video tutorial provides the formulas and equations needed to solve common projectile motion physics problems. It provides an introduction into the three types of graphs / trajectories that you will see in a typical projectile motion problem. Here is a list of topics / equations 1. Formula for finding the height of a cliff 2. Equation for finding the time it takes to hit the ground 3. Maximum Height Formula 4. Finding Initial Velocity Using R = Vxt 5. Maximum Range Formula - Horizontal distance / displacement 6. Velocity Vectors - Basic Trigonometry 7. Horizontal and Vertical Velocity Components 8. Kinematics Equations & Formulas 9. Time of Flight Formula Using Quadratic Equation 10. Projectile Motion at an angle formulas
This Sutra is a General Formula applicable to all cases of multiplication. The applications of this brief and terse Sutra are manifold. In this video we are taking it up in its most elementary application namely, to multiplication in general.
This organic chemistry video tutorial shows you how to draw lewis structures, bond line structures and skeletal structures including condensed structural formulas. It also shows you how to draw the lewis structures of functional groups such as alkanes, alkenes, alkynes, carboxylic acids, alcohols, ethers, esters, ketones, aldehydes, amides, nitriles, and amines. This video also helps you to draw cyclic structures as well cis and trans isomers. In addition, it helps you to easily identify substituents such as isopropyl, sec-butyl, isobutyl, isopentyl, and tert butyl as well as amino, hydroxy, ethoxy, methoxy, and oxo substituents.
This chemistry video tutorial provides an introduction to writing the formula of an ionic compound that contains transition metals with roman numerals and polyatomic ions. This video contains plenty of examples and practice problems that you can help you with your next worksheet assignment. Here is a list of topics: 1. Writing Formulas For Ionic Compounds - Same Charged Ions 2. Monoatomic vs Polyatomic Ions List 3. Charges of Common Monoatomic Ions Based On Group Number In the Periodic Table of Elements 4. Transition Metals and Roman Numeral System List of Examples and Chemical Formulas: Sodium Chloride, Calcium Sulfide, Aluminum Nitride, Lithium Oxide, Gallium Bromide, Magnesium Phosphite, Potassium Sulfate, Strontium Phosphate, Barium Nitrate, Iron (II) Sulfide, Copper (II) Nitrit...
Chemical equation & Chemical reaction Science | Prep.1 | Unit 1 Lesson 2 - Part 1 مستر احمد الباشا
This video explains how to write and name binary and ternary ionic formulas. The crossover technique and reverse crossover techniques are demonstrated using simple animations. I found this to be the most effective year ever teaching formula writing and naming and I credit this Powerpoint I created with most of the success.
This chemistry video lecture tutorial focuses on thermochemistry. It provides a list of formulas and equations that you need to know as well as the appropriate units. It provides a nice review covering topics such as the internal energy of a system, the surroundings, endothermic vs exothermic processes, work, pressure, and volume. It explains the difference between work done on the system vs work done by the system. It also shows you how to calculate q, the amount of heat absorbed or released by a system for processes that involve a temperature change or a phase change including the specific heat capacity concept of water. This video also discusses thermochemical equations and reactions and how to do thermochemical stoichiometry and conversions. This video contains plenty of examples...
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This video helps you to learn stoichiometry. It provides plenty of examples and practice problems. Topics Include the following: How To Convert Grams to Moles, Molecules, & Atoms How To Convert Moles to Grams How To Convert Gram to Formula Units & The Number of Ions How To Calculate The Molar Mass or Molecular Weight How To Find The Percent Relative Abundance of an Isotope How To Calculate The Average Atomic Mass of Boron How To Convert Grams of One Substance Into Grams of Another Mole to Mole Conversions How To Calculate Theoretical Yield, Percent Yield, & Actual Yield How To Identify The Limiting Reactant and Excess Reactant How To Find The Amount of Excess Reactant That Remains How To Calculate The Percent Composition of an Element in a Compound How To Find The Empirical Formula From ...
http://www.MathsGrinds.ie (C) Copyright Stephen Easley-Walsh. All rights reserved.
This general chemistry video tutorial provides a formula sheet / list of equations. It focuses on all the equations, variables, and constants that you need to know to help you with the mcat, dat, pcat, or your final exam in general or ap chemistry. Here is a list of topics: 1. Molarity, Molality, and Mass Percent Concentration Equations 2. Colligative Properties - Boiling Point Elevation Formula and Freezing Point Depression 3. Solute, Solvent, and Solution Relationship 4. Osmotic Pressure Equation and Van't Hoff Factor 5. How To Calculate The Vapor Pressure of a Solution Using Mole Fraction 6. Vapor Pressure of Solution With Two Volatile Components - Dalton's Law of Partial Pressure 7. The Relationship Between Vapor Pressure and Temperature - Clausius - Clayperon Equation - Entha...
In this video, we will discover how to rotate any vector through any axis by breaking up a vector into a parallel part and a perpendicular part. Then, we will use vector analysis (cross products and dot products) to derive the Rodrigues rotation formula and finish with a quaternion point of view. Using quaternions allows us to write a very compact formula which will be familiar to those who have used quaternions to do rotations.
In this video you will get an idea about general 2nd degree equation and it's application and some terms related to that which are used everywhere in CIRCLE,PARABOLA,ELLIPSE,HYPERBOLA. By our young content developer sulabh mahajan.
A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name, and it contains no words. Although a chemical formula may imply certain simple chemical structures, it is not the same as a full chemical structural formula. Chemical formulas can fully specify the structure of only the simplest of molecules and chemical substances, and are generally more limited in power than are chemical names and structural formulas.
The simplest types of chemical formulas are called empirical formulas, which use letters and numbers indicating the numerical proportions of atoms of each type. Molecular formulas indicate the simple numbers of each type of atom in a molecule, with no information on structure. For example, the empirical formula for glucose is CH_{2}O (twice as many hydrogen atoms as carbon and oxygen), while its molecular formula is C_{6}H_{12}O_{6} (12 hydrogen atoms, six carbon and oxygen atoms).