Molecule Essays & Research Papers

Best Molecule Essays

  • Molecules of Life - 595 Words
    Molecules of Life Computer Assignment A) What characteristics are typical of molecules that are gases at room temperature? Molecules that are gases at room temperature tend to be smaller in size. This causes it to have a small molecular masses and has a relatively weak intermolecular forces of attraction. B) Compare and contrast the characteristics of soluble and insoluble molecules. Soluble Molecules Insoluble Molecules -polar -non polar -lots of oxygen atoms -very few oxygen atoms...
    595 Words | 3 Pages
  • Water Molecules - 838 Words
    BCR: Which Towel? A student asks a testable question: “Which brand of paper towel absorbs the greatest volume of water?” Design an investigation to provide an answer for the student. Be sure to include • the materials needed. • a numbered procedure. • the independent and dependent variables. • important data that will answer the question. • ways to help ensure the accuracy of the results. Materials: Several paper towels, a flat dish, bottled water, a thermometer, a...
    838 Words | 4 Pages
  • Molecule of Water - 430 Words
    molecule of water A chemist's view of the world is not as narrow as one might think! Yes, we start with the atom, and then go on to the rules governing the kinds of structural units that can be made from them. We are taught early on to predict the properties of bulk matter from these geometric arrangements. And then we come to H2O, and are shocked to find that many of these predictions are way off, and that water (and by implication, life itself) should not even exist on our planet! But we...
    430 Words | 2 Pages
  • Modeling Molecules - 553 Words
    Modeling Molecules Introduction: You can represent a molecule two-dimensionally, as a structural formula or electron dot structure. Although such models are useful in certain contexts, they do not accurately represent bond angles between atoms or shapes of molecules. In this activity, you will construct three-dimensional models of several molecules. You will use electron dot structures and structural formulas to inform how you construct the three-dimensional models. Materials: jelly...
    553 Words | 4 Pages
  • All Molecule Essays

  • Atoms Molecules Elements - 739 Words
     Atoms, Molecules, and Elements CHM/110 William De Vorick June 30, 2014 Atoms, Molecules, and Elements Demetri Mendeleev was trying to organize the elements into a table by weight when he noticed that as the weights increase occasionally the properties of one element would resemble those of an element he already listed so he placed these elements in a column under the ones they resembled chemically ( Capri, PhD, 2003). Each chemical in the vertical rows on the periodic table are...
    739 Words | 3 Pages
  • Science: Atom & Molecules - 3478 Words
    |Atoms and Molecules | |Everyday Science | | An atom is the smallest "piece" of an element that still has the properties of that element. A molecule is a combination of two or more | |atoms bonded together....
    3,478 Words | 15 Pages
  • Chemistry Questions: Molecules and Heat
    Dylan Wang—8Br Ms. Cooney Chemistry 8 February 25, 2015 Chemistry Questions 1. Explain what is happening to the water molecules in the flat areas of the line on your graph during the phase changes from solid to liquid and liquid to gas. The water molecules are currently gathering potential energy to change from the differing states of matter. Due to thermal equilibrium, the water would need a set amount of energy to break ...
    348 Words | 1 Page
  • Organic molecules rubric - 410 Words
    Organic Chemistry Project: Designing molecules In order to understand the complexity and shape of an organic molecule you and your partner will be constructing a 3-D version of a selected organic compound. The project will have four parts: A blueprint of the molecule you will construct The molecule A legend explaining the structure of the molecule A paragraph explaining the importance of the molecule This project will count as one lab grade. A sample grade sheet is on the back....
    410 Words | 4 Pages
  • Atoms, Molecules, and Elements
    Atoms, Molecules and Elements Atoms, molecules and elements are the building blocks of everything we can see, hear, and touch. Though not visible to the naked eye, it is the combination of millions of these tiny substances that make us who and what we are today. Many elements make up the world around us, and each element reacts differently to its surroundings. The definition of reactivity as pertained to chemistry states, “The relative capacity of an atom, molecule, or radical to undergo a...
    511 Words | 2 Pages
  • Quiz: Moles Mass and Molecules
     Quiz--Moles, Mass, and Molecules Multiple Choice (Choose the best answer.) 1. What is the mass of one mole of AuCl3? A. 96 g B. 130 g C. 232.5 g D. 303.5 g E. 626.5 g 2. What is the mass of one mole of (NH4)2CO3? A. 144 g B. 138 g C. 96 g D. 78 g E. 43 g 3. A container of negligible mass is filled first with argon and then with helium. Which statement below would be true about the masses of the two gases (after adjustment for the buoyant effect of air)? A. The mass of the helium would...
    262 Words | 2 Pages
  • Electrophoreses: Using Electricity to Separate Molecules
    Lab Report #6 Electrophoresis: Using Electricity to Separate Molecules Answer the following questions about the results of the virtual lab activity. Record your answers in the boxes. Activity 1 – Calibration Record your data from Activity 1 in the boxes below. Enter the data (number of bands, description of the band patterns) you collected for the protein ladder in the appropriate columns for the gel concentrations (8%, 10%, 12%) Gel 8% 10% 12% Number of Bands 4 5 6 Description of...
    307 Words | 3 Pages
  • Determining the Number of Water Molecules in a Hydrate
    Determining the Number of Water Molecules in a Hydrate Results Mass of empty beaker 55.11 g Mass of beaker with hydrated copper (II) sulfate 58.13 g Mass of hydrated copper (II) sulfate 3.02 g Mass of beaker with dehydrated copper (II) sulfate (last weighing) 57.22 g Mass of dehydrated copper (II) sulfate 2.18 g Mass of dehydrated copper (II) sulfate (2nd weighing) 2.11 g Questions 1. Calculate the value of “n”. Show your work. Include an example of ALL calculations involving...
    723 Words | 3 Pages
  • 9 Science Atoms And Molecules Test 01
    CBSE TEST PAPER-01 CLASS - IX Science (Atoms and Molecules) 1. Atomic radius is measured in nanometers and (a) 1nm = 10-10m (b) 1m = 10-10nm (c) 1m = 10-9nm (d) 1nm = 10-9m 2. Symbol of Iron is :- (a) Ir (b) I 3. Atomicity of chlorine and Argon is (c) Fe [1] (d) None of these [1] [1] (a) Diatomic and Monoatomic (b) Monoatomic and Diatomic (c) Monoatomic and Monoatomic (d) Diatomic and Diatomic 4. Molecular mass of water ( H 2O ) is (a) 18g 5. State law of conservation of...
    242 Words | 4 Pages
  • chm 113 exam 4
    CHM113 summer 2014 Name: __________________________ EXAM 4 SHOW YOUR WORK 1) Of the molecules below, the bond in __________ is the least polar. A) HBr B) HI C) HCl D) HF E) H2 2) Ethanol (C2H5OH) melts at -114°C. The enthalpy of fusion is 5.02 kJ/mol. The heat capacity of solid and liquid ethanol are 0.97 J/g-K and 2.3 J/g-K, respectively. How much heat (kJ) is needed to convert 25.0 g of solid ethanol at -135°C to liquid ethanol at -50°C? A) 207.3 B) -12.7 C) 6.91 D) 4192...
    747 Words | 6 Pages
  • Chemistry Sy - 323 Words
    Chemistry 101 General Chemistry Fall 2013 –Syllabus S. Bakshandeh Office Hours: MW, 12:00–12:35 pm & T; 1:40-2:15 pm Room 92032 and/or Lab 92011. Email: sbakshandeh@yahoo.com – The best way to reach me is by email. Please indicate your full name and section number in the “Subject/Re” box. I will not open emails without proper identification. Blurb: Welcome to your first course in college chemistry. In this course, we will be exploring laws, theories, and principles of chemistry as...
    323 Words | 3 Pages
  • Molecular Modeling - 695 Words
    Molecular Modeling Exercise The purpose of the is lab was to practice modeling molecules and exploring the capabilities of the ChemOffice programs. The minimum energy was found for each of the three molecules tested and the strain energy at different dihedral angles was plotted. The first molecule, butane, was easily completed but amphetamine and U4EA caused some difficulty. The results of the last two were not very conclusive. INTRODUCTION The purpose of this lab was to explore the...
    695 Words | 3 Pages
  • Chemistry - 433 Words
    In the Lewis symbol for a fluorine atom, there are __________ paired and __________ unpaired electrons. A) 4, 2 B) 0, 5 C) 2, 5 D) 6, 1 E) 4,1 2. Which of the following would have to gain two electrons in order to achieve a noble gas electron configuration? O Sr Na Se Br A) Sr B) Br C) Sr, O, Se D) Na E) O, Se 3. The electron configuration of the S2- ion is __________. A) [Ne]3s23p2 B) [Ne]3s23p6 C) [Kr]3s22p-6 D) [Ar]3s23p2 E) [Ar]3s23p6 4. The ion NO- has...
    433 Words | 5 Pages
  • Classification of Chemical Substance - 786 Words
    Chemistry Laboratory Report Classification of Chemical Substances Student: Saule Sadykova Lab Partner #1: Temirlan Atambaev Lab Partner #2: Almas Ospanbekov Instructor: Eugene Douglass Nazarbayev University Purpose The aim of this experiment is to investigate the properties of several substances with the purpose of determining whether they are molecular, ionic, macromolecular or metallic. Introduction Chemical substances could be named ionic, molecular or metallic substance,...
    786 Words | 3 Pages
  • Accurate Measurement of Mass and Volume
    Aim: To know the procedure of measuring the accurate mass of a solid To calculate the number of moles of an unknown mass from its mass and molecular mass To know how to dilute a solution and the effect of dilution on the solution’s absorbance Materials: Copper Sulfate Coloured solution – Potassium Manganate (KMnO4) Hotplate Method: Part A: The Formula of Hydrated Copper (II) Sulfate Firstly, about 1.0 g of hydrated copper (II) sulfate was put in the weighing bottle and the colour...
    648 Words | 3 Pages
  • Hydrate Lab - 511 Words
    DETERMINATION OF THE CHEMICAL FORMULA FOR A HYDRATE USING MOLE RATIO OF WATER MASS AND MAGNESIUM SULPHATE INTRODUCTION Ionic (salt) compounds are able to hold loose bonds with water molecules. A hydrate is a compound that incorporates water molecules into its crystalline lattice structure (McGraw-Hill Ryerson, 2014). Identifying a compound as hydrated or anhydrous is important as the mass of the compound increases if it contains water molecules. In nature, hydrates exist with a fixed...
    511 Words | 2 Pages
  • Synthesis of Divanillin Lab Report
    Lab Report #1 Title: Synthesis of Divanillin Abstract: The purpose of this experiment was to synthesize divanillin. This was done via the oxidative dimerization of two equivalents of vanillin, using enzyme horseradish peroxidase as the catalyst. Procedure: Lab Handout: Nishimura, R.T.; Giammanco, C.H.; Vosburg, D.A. J. Chem Educ. 2010, 87, 526-527. Discussion: Mechanism: Reaction 2 Vanillin H2O2 Divanillin 2...
    521 Words | 4 Pages
  • Organic Chemistry - 121450 Words
    Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals, Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule, how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5...
    121,450 Words | 1808 Pages
  • exam - 703 Words
    Gel Filtration Gel filtration is a non-adsorptive chromatography technique that separates molecules on the basis of molecular size. Desalting and buffer exchange are two special examples of gel filtration that are widely used in many downstream bioprocesses. Desalting is used to completely remove or lower the concentration of salt or other low molecular weight components in the sample while buffer exchange replaces the sample buffer with a new buffer. Gel filtration is one of the easiest...
    703 Words | 3 Pages
  • Avogadro - 260 Words
    History on Avogadro’s Number Lorenzo Romano Amedeo Carlo Avogadro was born in Turin, Italy, on 9th August, 1776. His family was very wealthy and popular among the people. Even though Avogadro’s family was mostly lawyers, he enjoyed private studies of mathematics and physics. His first scientific research in 1803 was on electricity. After John Dalton published his New System of Chemical Philosophy, more and more additions to the knowledge of chemistry were revealed. In 1811, Avogadro...
    260 Words | 1 Page
  • CHEMISTRY - 828 Words
    MOLECULAR GEOMETRY Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It determines several properties of a substance including its reactivity, polarity, phase of matter, color, magnetism, and biological activity.[1][2] The angles between bonds that an atom forms depend only weakly on the rest of molecule, i.e. they can be understood as approximately local and hence transferable properties. The specific three dimensional arrangement of atoms in...
    828 Words | 3 Pages
  • Free Radical Substitution - 873 Words
     The objective of this experiment is to conduct a free radical reaction and measure the ratio of products through a GC analysis. Free radical reactions are important to understand because they allow chemists to design synthesis of complex molecules from very simple organic molecules. The reagents used were 2,3-dimethylbutane as the carbon chain, t-butyl peroxybenzoate as the initiator, and sulfuryl chloride as the source of chloride radicals. The predicted products are...
    873 Words | 4 Pages
  • Naming Chemical Compounds - 1783 Words
    Naming Chemical Compounds General Information: Scientists all around the globe use a standard method for naming chemical compounds. The standards were set up by an international committee sponsored by the International Union of Pure and Applied Chemistry (IUPAC). Having this standard makes life easier for people who use these compounds everyday. It would be tough to set up any experiment if scientists everywhere used different names for the same compound. It would also make the lab a...
    1,783 Words | 13 Pages
  • Formula of a Hydrate - 484 Words
     Title: Formula of a Hydrate. Objective: Determining the percentage of water and the chemical formula of a hydrate. Background: Water has a polar structure and it has positively and negatively charged parts within each molecule. This gives it a strong attraction toward ions. The ions in some salts attract and form strong bonds with water molecules. These salts, when they have absorbed water, are called hydrates. Anhydrous salts are salts that can form hydrates but which have had all the...
    484 Words | 2 Pages
  • Spectroscopy Breakdown - 568 Words
    CH 202 Breakdown UV/Vis: Molecules containing π-electrons or non-bonding electrons (n-electrons) can absorb the energy in the form of ultraviolet or visible light to excite these electrons to higher anti-bonding molecular orbitals. The more easily excited the electrons (i.e. lower energy gap between the HOMO and the LUMO), the longer the wavelength of light it can absorb. Conjugation raises the energy of the bonding orbitals and lowers the energy of the antibonding molecular orbital....
    568 Words | 2 Pages
  • Vsepr Theory - 335 Words
    ABCEDE, GEORGETTE B. 01.23.13 NAS102 CODE13873 VSEPR Theory VSEPR (Valence Shell Electron Pair Repulsion) theory proposes that the geometric arrangement of terminal atoms, or groups of atoms about a central atom in a covalent compound, or charged ion, is determined solely by the repulsions between electron pairs present in the valence shell of the central atom. The number of electron pairs around the...
    335 Words | 2 Pages
  • Mole Lab Exercise - 944 Words
    Name Mole Lab Exercises I. Pre Lab Questions Answer the following questions. (Hint: Your textbook will be helpful.) 1. ‘s number is the number of carbon atoms that are present in 12 g of 12C. 2. How many molecules of a compound are in one mole of that compound? 3. Write out the formula for finding percent by mass. 4. Write out the formula for finding Molarity. 5. The Formula Weight of a compound is equal to mole of that compound....
    944 Words | 4 Pages
  • Cat and the Hat - 1649 Words
    Name Period Date Molecular Geometry – Ch. 9 For each of the following molecules, draw the Lewis Diagram and tally up the electron pairs. Then, identify the correct the molecular shape and bond angle. molecule lewis diagram e- tally shape bond angle 1. SeO3 2. AsH3 3. NO2 - 4. BeF2 molecule lewis diagram e- tally shape bond angle 5. SiH4 6. SeH2 7. PF5 8. SCl6...
    1,649 Words | 17 Pages
  • Chem 115 - 496 Words
    9.2 a) 120 b) If the blue balloon expands, the angle between red and green balloons decreases. c) Nonbonding (lone) electron pairs exert greater repulsive forces than bonding pairs, resulting in compression of adjacent bond angles. 9.12 a) Both molecules would be symmetrical because all four surrounding atoms are the same. In a symmetrical tetrahedron, the four bond angles are equal to each other, with values of 109.5°. The H-C-H angles in CH4 and the O-Cl-O angles in ClO4- will...
    496 Words | 2 Pages
  • Chapter 6 Review PDF
    - Only noble gas elements exist as isolated atoms; they are monoatomic, the consist of single atoms ! - Molecule: The smallest electrically neutral unit of a substance that still has the properties of the - - - - - - ! substance! • Made up of two or more atoms that act as a unit! Molecular Compounds: Compounds composed of molecules ! • Tend to have a low melting and boiling point! • Exist as gases or liquids at room temperature! • Composed of atoms of two or more nonmetals! Not all...
    892 Words | 5 Pages
  • Diffusion and Albumin Glucose Na+
    Name: Leslie Estrada Exercise 1: Cell Transport Mechanisms and Permeability: Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The driving force for diffusion is You correctly answered: b. the kinetic energy of the molecules in motion. 2. In diffusion, molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the...
    655 Words | 8 Pages
  • Hydrate Lab - 468 Words
    An ion is an atom or a molecule with a positive or a negative charge due to the loss or gain of one or more electrons. Ionic solids are salts (such as NaCl) that are held together by a strong force of attraction between ions of opposite charge. Molecules are the smallest physical units of an element or a (chemical) compound. Ionic solids are also known as salts because salts are ionic compounds that are formed from a reaction between an acid and a base. Hydrates are inorganic salts which...
    468 Words | 2 Pages
  • Empirical and Molecular Formula - 779 Words
    Empirical and Molecular Formula | Key Concepts * Empirical Formula of a compound shows the ratio of elements present in a compound. * Molecular Formula of a compound shows how many atoms of each element are present in a molecule of the compound. * The empirical formula mass of a compound refers to the sum of the atomic masses of the elements present in the empirical formula. * The Molecular Mass (formula mass, formula weight or molecular weight) of a compound is a multiple of the...
    779 Words | 3 Pages
  • Hydrated Salts - 359 Words
    Investigation of a Hydrated Salt Table of Calculations: „³ Unknown #2 Weight of hydrate before heating .9989g Weight hydrate after heating .6534g Weight of water .3455g Mole of water in hydrate .0192mol Mole of anhydrous salt: CuSO4 .004094mol CuCl2 .004859mol CoCl2 .005033mol Mole ratio of water to each of the anhydrous salts: CuSO4 4.69...
    359 Words | 2 Pages
  • Molar Conversions - 942 Words
    Mole Conversion Web Quest EO 103 What the heck is a mole? We have Avagadro ( and others) to thank for this…….. 6.02 x 1023 is the number of “things” per mole of the substance. Here is a tutorial for an over view and for a reference as you work through these problems http://www.wiley.com/college/chem/spencer053872/tutorial/gramsmoles/gramsmoles1.html We can use this to do mathematical conversions to determine mass, volume, and number of atoms or molecules in a given substance. For example...
    942 Words | 4 Pages
  • geograpgh for csec - 343 Words
    Chemist ry Teacher: Mr. J. Rowe School: Washington Archibald High School Due Date: Thursday, February 13, 2014 Please answer the following questions. SHOW ALL WORKING 1. Arrange the following in order of increasing number of atoms a. 27g of Aluminum (Al) b. 0.5 mol of Al 3 c. 50 dm of HNO3 at STP d. 1 x 10 –2 mol of Al e. 2.1 mol of Al 2. What information does the formula of ethanol (CH3CH2OH) contain? How many moles of ethanol are present in 920 g of ethanol? 3. Mr....
    343 Words | 2 Pages
  • Lab 12 - 431 Words
    LAB 12 PERCENTAGE COMPOSITION OF HYDRATES Pre-Lab Questions: See page(s) 1 for calculations Purpose: The purpose of this lab was to learn how to determine the percent of water in a hydrate. Materials: Evaporating dish Ring stand Wire gauze Burner Crucible tongs Triple beam balance Copper(II) sulfate penta-hydrate Spatula Glass stirring rod Distilled water Procedures: See page(s) 1 and 2, for procedure steps 1-11 Observations and Data: 1. Mass of...
    431 Words | 2 Pages
  • 3.07 chemistry - 284 Words
    Copy the following questions into your assessment document. You may copy and paste the table, or create a similar table in the document.) After completing the molecular models, fill in the table below: (18 points) Molecule What is the central atom of this molecule? Number of lone pairs on the central atom Number of atoms bonded to the central atom Molecular geometry Bond angle (based on VSEPR theory) CCl2F2 C Zero 4 Tetrahedral 109 degrees HCN C Zero 2 Linear 180...
    284 Words | 3 Pages
  • Mole and Formula - 791 Words
    AKS Review: Moles AKS Correlation 9c. Apply concepts of the mole and Avogadro’s number to conceptualize and calculate: -empirical/molecular formulas -mass, moles, and molecules relationships In all calculations that follow, SHOW ALL WORK AND USE SIGNIFICANT FIGURES. 1. Write Avogadro’s number in standard and in scientific notation. 2. What is a mole? 3. (a) In your own words, what is molar mass? (b) Find the molar mass of the following: Fe...
    791 Words | 5 Pages
  • Chemistry - 6617 Words
    I. Grade Level/Unit Number: 9-12 Unit 7 II: Unit Title: Mole Concept III. Unit Length: 7 days (on a 90 min. per day block schedule) IV. Major Learning Outcomes: Students should be able to: Mole Concept • Calculate formula mass. • Convert representative particles to moles and moles to representative particles. (Representative particles are atoms, molecules, formula units, and ions.) • Convert mass of atoms, molecules, and compounds to moles and moles of...
    6,617 Words | 37 Pages
  • PhysioEx Exercise 1 - 435 Words
    Exercise 1: Cell Transport Mechanisms and Permeability: Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The driving force for diffusion is You correctly answered: b. the kinetic energy of the molecules in motion. 2. In diffusion, molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the largest pore size? You...
    435 Words | 2 Pages
  • The Mole - 467 Words
    THE MOLE A mole (symbol Mol) is the base unit of quantity of a substance in the metric system. A mole is the quantity of a substance that contains 6.02 x 1023 units. A "unit" is the smallest measurable entity in the substance, generally either an atom or a molecule. The number of units in a mole was determined by Italian chemist (a scientist specializing in the composition, structure, properties, and reactions of matter) Amedeo Avogadro (1776-1856), one of the founders of modern physical...
    467 Words | 2 Pages
  • Mass Spectroscopy - 570 Words
    Mass Spectroscopy Mass spectroscopy is a method used in science and industry in order to obtain the masses and relative concentrations of atoms and molecules and to detect isotopes in a sample based on their masses. In order to do this the method requires an instrument called the ‘mass spectrometer’, of which, is able extract accurate information of the relative masses of isotopes and their relative abundance. This makes the mass spectrometer very useful for applications such as carbon...
    570 Words | 2 Pages
  • Chemistry and Computers - 331 Words
    • At the heart of any microprocessor are transistors • number of transistors that make today’s CPUs more powerful then ever • Chemistry gave us transistors nearly 60 years ago and continues to improve them, mainly by letting engineers make them ever smaller. But as transistors, and the chips containing them, have continued to shrink, new problems have arisen, and once again chemistry will be needed to solve them. • the transistor performs two tasks very well. Amplification is one. But often...
    331 Words | 1 Page
  • OilCharacterization - 2633 Words
    Oil Characterization 1 Oil Characterization 1 © 2003 AspenTech. All Rights Reserved. EA1031.31.05 05 Oil Characterization.pdf 2 Oil Characterization Workshop The petroleum characterization method in HYSYS converts laboratory analyses of condensates, crude oils, petroleum cuts, and coal-tar liquids into a series of discrete hypothetical components. These petroleum hypo components provide the basis for the property package to predict the remaining thermodynamic and transport properties...
    2,633 Words | 35 Pages
  • Mass Spectrometer - 886 Words
    Mass Spectrometer When you hear the words mass spectrometer, what do you think of? To some people, these words do not have any meaning; however the mass spectrometer has a great significance. The mass spectrometer has been a universal research tool, mostly involved in comparing the masses of atoms. Since the invention of this tool about 100 years ago, the mass spectrometer has been responsible for the description of molecular structure, the detection of isotopes, the classification of...
    886 Words | 3 Pages
  • Chem Empirical Formula of a Hydrate Formal Lab
    Student: ​ Glavin Wiechert Group Member: Victoria Coe Due Date: May 2, 2011 Teacher: Louth, Ellen Mary Class: Chemistry 11 Ad Introduction: An empirical formula of a chemical compound is the ratio of atoms in simplest whole­number terms of each present element in the compound. For example, Glucose is C​ H​ O​ ; it’s empirical formula is CH​ O. 6​ 12​ 6​ 2​ ...
    1,037 Words | 10 Pages
  • Chem - 495 Words
    The VSEPR Model 10.33 Predict the shape or geometry of the following mole- cules, using the VSEPR model. a. SiF4 b. SF2 c. COF2 d. PCl3 10.34 Use the electron-pair repulsion model to predict the geometry of the following molecules: a. GeCl2 b. NF3 c. SCl2 d. XeO4 10.35 Predict the geometry of the following ions, using the electron-pair repulsion model. a. ClO3􏰅 b. PO43􏰅 c. SCN􏰅 d. H3O􏰆 10.36 Use the VSEPR model to predict the geometry of the fol- lowing ions: a. N3􏰅 b. BH4􏰅 c. SO32􏰅 d....
    495 Words | 2 Pages
  • Gel Electrophoresis - 966 Words
    Alexander Davis Period: 1 Group Partners: Jenny Case Blake Rebek Matthew Heigm...
    966 Words | 4 Pages
  • Empirical Formula Lab Magnesium Chlori
    Pre-Lab Discussion An empirical formula is a formula for a chemical compound found by direct laboratory examination. Laboratory procedures allow the chemist to find the simplest whole number ratio of elements within the compound. In order to find the true molecular formula, the chemist also needs to know the compound’s molecular mass. The general procedure is to use laboratory techniques to determine the mass of each element in the compound. In this lab, we will react a known quantity of...
    385 Words | 2 Pages
  • aristo chemistry - 5164 Words
     Contents PART XV ANALYTICAL CHEMISTRY Chapter 63 Detecting the presence of chemical species Action of heating solid sample strongly 1 Chapter 64 Separation and purification methods Centrifugation Sublimation Partition equilibrium of a solute between two immiscible solvents Two-dimensional thin-layer chromatography 2 2 3 6 Chapter 65 Quantitative methods of analysis Detection of end point in acid-alkali titration 8 Chapter 66 Instrumental analytical...
    5,164 Words | 22 Pages
  • MOLE UNIT REVIEW WKST Answers
    MOLE UNIT REVIEW WORKSHEET 1. Convert 500.0 g NaCl to formula units. 5.15 x 1024 f.u. Convert 9.8 x 1024 molecules of C2H6 to grams. 4.9 x 102 g The mass of an unknown gas is 11.59 g. The mass of an equal volume of He is 1.45 g. Calculate the molar mass of the unknown gas. 32.0 g/mol Calculate the percentage composition of sulphur in Al2(SO4)3. 28.11% Calculate the molar mass of Co2(SO4)3•6H2O 514.16 g/mol The empirical formula for a compound is C2H5O and its molecular...
    753 Words | 3 Pages
  • Glucuronolactone - 337 Words
    Glucuronolactone Common name Glucuronolactone IUPAC Name (2R)-2-[(2S,3R,4S)-3,4-Dihydroxy-5-oxo-tetrahydrofuran-2-yl]-2-hydroxy-acetaldehyde Line Structural Diagram Physical Properties Glucuronolactone is a white solid odorless compound. Soluble in hot and cold water. Chemical Properties Its melting point ranges from 176 to 178 °C The compound can exist in a monocyclic aldehyde form or in a bicyclic hemiacetal (lactol) form. The molecular weight of this...
    337 Words | 2 Pages
  • Diffusion - 1665 Words
     The Effect of Molecular Weight and Time on the Diffusion Rate of Potassium Permanganate, Potassium Dichromate, and Methylene Blue.1 Arantxa Alex Carpio Group 1 Sec. X – 4L March 24, 2015 ABSTRACT The effect of molecular weight and time on the rate of diffusion was determined using the agar-water gel test. A petri dish of agar-water gel with three wells was prepared and a prepared solution of each substance was dropped on each well; one with potassium...
    1,665 Words | 10 Pages
  • Plasma vs. BEC - 615 Words
    Most people have heard of the more common states of matter: solids, liquids, and gases. Fewer people know that there are actually more states of matter, including the fourth and fifth states: plasma and the Bose-Einstein Condensate, or BEC. The plasma and Bose-Einstein Condensate states of matter, while having some similarities, are two completely different forms of matter and connect with the Kinetic Molecular Theory in differing ways. Plasma is the fourth state of matter. It’s a fluid,...
    615 Words | 2 Pages
  • Osmosis Question - 518 Words
    Sophie Murdock Osmosis Lab Osmosis in Plant Cells: Solution Initial Volume (mL) Final Volume (mL) Percent Change Distilled Water 0.8 1.0 125% 0.4% NaCl 0.5 0.8 160% 0.9% NaCl 0.6 0.8 133% 5% NaCl 0.6 0.5 83% 10% NaCl 0.6 0.5 83% 8. The cells in the solutions of distilled water, 0.4% NaCl, and 0.9% NaCl would all appear to be inflated and could burst. This is due to the fact that the solution is hypotonic to the potato, thus water is entering the cell. Meanwhile, the cells in the...
    518 Words | 4 Pages
  • Molecular Modelling - 493 Words
    Molecular modelling is the general term used to describe the use of computers to construct molecules and perform a variety of calculations on these molecules in order to predict their chemical characteristics and behaviour. The term molecular modelling is often used synonymously with the term computational chemistry. Computational chemistry is a broader term, referring to any use of computers to study chemical systems. Some chemists use the term computational quantum chemistry to refer to the...
    493 Words | 2 Pages
  • white like me - 426 Words
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  • Course Notes - 1461 Words
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