Documents about Sodium Azide

  • 11 Pages

    Lect+4+08

    University of Michigan, CHEM 230

    Excerpt: ... r a day or so has passed work some additional problems to reinforce your understanding of the section you have been studying. From the lecture 3 6NaN3(s) + Fe2O3(s) 3Na2O(s) + 2 Fe(s) + 9N2(g) This is the reaction that inflates "air bags" in cars. Is it balanced? We need to produce 100.8 L of N2 at 273K and 1 atm. 1) How many grams of NaN3 should I use? 2) Since NaN3 is a energetic material we need to completely react the entire amount used. How much Fe2O3 do I need to sure to insure that sodium azide is the limiting reagent? Take four minutes to work through these two problems using the 5 step method. Compare your method and results with your neighbors. Ideal Gases Act Independently Since there are no interaction between the gas particles each gas particle behaves independently Partial pressures are additive Ptot = Pa+Pb+Pc Ideal gas equation for component"a" PaV = naRT Mole fractions for component"a" na/ntot = Pa/Ptot For ideal gases Components in a gas mix ...

  • 8 Pages

    Succinate Dehydrogenase Lab

    Cincinnati, BIOL 301

    Excerpt: ... Succinate Dehydrogenase in Mitochondria Purpose: to investigate activity of succinate dehydrogenase in the presence of increased enzyme, increased substrate, and various other conditions Broken mitochondria Also research malate DH No azide Heat Succinate Dehydrogenase in Mitochondria Approach: Isolate mitochondria from cauliflower Measure the SDH activity using a spec and DCIP, an artificial e- acceptor Determine the normal rate of the reaction by calculating the change in ABS Succinate Dehydrogenase Removes electrons from its substrate succinate and uses them to reduce FADH to FADH2 FADH2 is normally oxidized by the electron transport chain (ETC) Here, an artificial electron acceptor, DCIP, is used to trap the electrons DCIP "Catches" e- before ETC Sodium azide inhibits ETC Using sodium azide increases the chances that the e- will go to DCIP DCIP in oxidized form is colored, reduced form is colorless If reaction mix is sti ...

  • 19 Pages

    Chapter 6 Part 2

    BC, CHEMISTRY CH105

    Excerpt: ... stance. 4. Use the molar mass to convert the moles of the desired substance to grams of the desired substance. Mole and Mass Relationships in Chemical Equations Be ready for different problem permutations EXAMPLE 6.12 Mass Relationships The decomposition of sodium azide (NaN3) produces sodium metal and nitrogen gas. The gas is used to inflate automobile airbags. What mass of nitrogen, in grams, can be made from 60.0 g of sodium azide ? Solution 1. Chemists to the rescue!/Chemistry saves lives! We start by writing and balancing the chemical equation, which shows that 2 mol NaN3 produces 2 mol Na and 3 mol N2. 2 NaN3 2 Na + 3 N2 2. 3. The molar mass of NaN3 is 23.0 g/mol + (3 x 14.0) g/mol = 65.0 g/mol and the molar mass of N2 is (2 x 14.0) g/mol = 28.0 g/mol. We convert the mass of the given substance, sodium azide , to an amount in moles. 60.0 g NaN3 x 1 mol NaN3 65.0 g NaN3 = 0.923 mol NaN3 4. We use coefficients from the balanced equation to establish the stoichiometric factor that relate ...

  • 7 Pages

    Lab 4 Properties of Enzymes

    Illinois State, BSC 197

    Excerpt: ... buffer, pH 3, 5, 7, & 9 solutions, trypsin, sodium azide , and hydrogen peroxide. For each of the five subset experiments we set up the appropriate catalase concentration and added any necessary elements. The first catalase we prepared was the enzyme catalase and the lysate because it is required to incubate for an hour or more. After we prepared the catalase solutions that will be changed by temperature, and place on in the hot water bath, and put one on ice, the catalase solutions with different concentrations and pH levels in them and the catalase and sodium azide solution. We dipped the disc into enzyme catalase solution then droped the disc into the hydrogen peroxide solution. We recorded the time it took for the disc to float to the top in seconds. If the disc took longer than 5 minutes to float to the top, we recorded it as no reaction. Results: Table 1 Raw Data-Effect of Enzyme Concentration on Reaction Rate Concentration Time Trial 1 Time Trial 2 Time Trial 3 100% 50% 25% Table 1 Calculated Values ...

  • 10 Pages

    CH223 001 HW 33

    N.C. State, CH CH 102, 20

    Excerpt: ... gent. 7. 3.75/3.75 points Each of the 3 amino alcohols was formed in two steps with the last step being catalytic hydrogenation. The organic starting material for each has the same molecular formula and each contains only one oxygen. (a) Draw the organic starting material for: 7 of 10 12/7/2008 2:07 PM CH223 001 HW 33 http:/www.webassign.net/v4cgirhshaw@ncsu/student.pl?m=200812071. A O=C1CCCCC1 B C2CCC1OC1C2 C2CC[C@H]1O[C@H]1C2 C2CC[C@H]1O[C@H]1C2 C C2CCC1OC1C2 C2CC[C@H]1O[C@H]1C2 C2CC[C@H]1O[C@H]1C2 (b) Type in the name of the reagent you need for the first step. 8 of 10 12/7/2008 2:07 PM CH223 001 HW 33 http:/www.webassign.net/v4cgirhshaw@ncsu/student.pl?m=200812071. A Sodium Cyanide sodium cyanide -or- cyanide -or- cyanide ion B Sodium Cyanide sodium cyanide -or- cyanide -or- cyanide ion C Sodium Azide sodium azide -or- azide -or- azide ion Solution or Explanation A: formed by the reaction of cyanide ion with a ketone and then the cyanohydrin is reduced to the geminal amino alcoh ...

  • 98 Pages

    LG11

    Western Washington, BIOL 321

    Excerpt: ... High Frequency of Recombination (Hfr) .bacteria exhibiting a high frequency of recombination, .the F factor is integrated into the chromosomal genome. F factor and Chromosomal DNA are Transferred Recombination Requires Crossing over Double Crossover Incomplete Transfer of DNA Interrupted Mating: a break in the pilus during conjugation stops the transfer of DNA, Transfer occurs at a constant rate, provides a means to map bacterial genes. How Do You Interrupt Bacterial Mating spread on agar mate for specified time frappe Hfr and Mapping HfrH strs thr+ azir tonr lac+ gal+ (sensitive to streptomycin) (able to synthesize the amino acid threonine) (resistant to sodium azide ) (resistant to bacteriophage T1) (able to grow with lactose as sole source of carbon) (able to grow with galactose as sole source of carbon) Fstrr thr azis tons lac gal (resistant to streptomycin (threonine auxotroph) (sensitive to sodium azide ) (sensitive to phage T1) (unable to grow on lactose) (unabl ...

  • 2 Pages

    BIO 325 - Fall 2007 - TTh 200 to 330 - Quiz IV

    University of Texas, BIO 325

    Excerpt: ... oli between an Hfr strain that is leu+ his+ gly+ and an F- strain that is leuhis- gly-. Interrupted-mating studies show that his+ enters the recipient last. In an interruptedmating experiment between these two strains, his+ recombinants are selected and tested for the presence of the leu+ and gly+ alleles. The following numbers of individuals are found for each genotype: gly+ leu+ his+ = 259 gly- leu+his+ = 1 + + gly leu his = 11 gly- leu-his+ = 29 300 What is the gene order and map distances between these three markers? (4 points) 3. Two E. coli strains were obtained with the following genotypes: Hfr: ala- leu+aziSStrS F-: ala+ leu-aziRStrR After an uninterrupted conjugation, you want to select exconjugants that are ala+ leu+. Which of the following media would you use for this selection? (4 points) (a) (b) (c) (d) (e) (b) Complete medium containing streptomycin Minimal medium containing streptomycin Minimal medium containing leucine and streptomycin Minimal medium containing sodium azide and leucine Min ...

  • 1 Pages

    ames

    Laurentian, BIO 3200

    Excerpt: ... Ames Test Results - Spring 2005 Labs 1 and 3 Number of colonies 1535 1538 Sample Water 7; 9 41; 42 Sodium Azide 4272; 2224 38; 17 Cig. Extract 19; 10 29; 20 Cooked Burger (McDonalds) 14 43 Gap Hair Gel 13 34 Candy 13 34 Body Spray (Calgon) 10 39 Dial Body Wash (antibacterial) 1 2 Degreaser 6 30 ...

  • 4 Pages

    exam1f00

    BYU, CHEM 105

    Excerpt: ... at it may not be necessary to use all the data provided. NOTE: You may use your calculator only to do calculations. You may NOT use any data, text, or other information stored in your calculator. DO NOT DISCUSS THIS EXAM WITH ANYONE BEFORE THURSDAY, SEPTEMBER 28, 2000. PAGE ONE (4) 1. Write the name for each of the following: Au(NO3)3 _ KIO3 _ CaCl2 _ FeSO4 _ (1) 2. Write the speed of light to 6 significant figures: _ (20) 3. Sodium azide , NaN3, is a solid that decomposes to the elements, explosively and with evolution of heat at about 300 oC. a. Write the formula for the azide ion:_ b. Write a balanced equation for the decomposition of sodium azide at 25 oC, showing the physical states (i.e. solid, liquid, gas) of reactant and products. c. Is NaN3 the formula you would expect for a compound formed from sodium and nitrogen? Y ...

  • 9 Pages

    ex3

    Wisconsin, CHEM 103

    Excerpt: ... er container at constant temperature, the pressure will decrease by 50%. Given the reaction 2 CO(g) + O 2(g) 2 CO2(g), if 2 moles of CO(g) react with 1 mole of O 2(g) to form CO 2(g) in a closed container at 25 oC, the pressure in the container will decrease. 5. Sodium Azide (NaN3), the explosive compound in automobile air bags, decomposes according to the equation : 2NaN3( s) 2Na(s ) + 3N2( g ) What mass of sodium azide is required to provide the nitrogen gas needed to inflate a 75.0L bag to a pressure of 1.3 atm at 25C? a. b. c. d. e. 255 g 210 g 85 g 170 g 112 g 6. Imagine you are setting up a chemistry 103 demo similar to the shrinking/expanding balloon demo done in class, to illustrate Charles' Law. You are in your laboratory and start from a balloon of 2.0L volume containing Helium, at 25.0EC. Pour a large excess of liquid nitrogen (the temperature of liquid nitrogen is T1= -196EC) on top of the balloon until it shrinks to volume V1. Then let the balloon go back to room temperature and heat it ge ...

  • 9 Pages

    Sodium Azide

    CofC, RM 120

    Excerpt: ... SIGMA-ALDRICH MATERIAL SAFETY DATA SHEET Date Printed: 11/26/2007 Date Updated: 11/13/2006 Version 1.7 Section 1 - Product and Company Information Product Name Product Number Brand Company Address Technical Phone: Fax: Emergency Phone: SODIUM AZIDE 13412 RIEDEL Sigma-Aldrich 3050 Spruce Street SAINT LOUIS MO 63103 US 800-325-5832 800-325-5052 314-776-6555 Section 2 - Composition/Information on Ingredient Substance Name SODIUM AZIDE Formula Synonyms CAS # 26628-22-8 SARA 313 Yes RTECS Number: NaN3 Azide, sodium * Azoture de sodium (French) * Azydek sodu (Polish) * Kazoe * Natriumazid (German) * Natriummazide (Dutch) * NCI-C06462 * Nemazyd * NSC 3072 * RCRA waste number P105 * Smite * Sodium azide (ACGIH) * Sodium, azoture de (French) * Sodium, azoturo di (Italian) * U-3886 VY8050000 Section 3 - Hazards Identification EMERGENCY OVERVIEW Highly Toxic (USA) Very Toxic (EU). Heating may cause an explosion. Very toxic by inhalation, in contact with skin and if swallowed. Contact with acids liberates very toxic ...

  • 2 Pages

    actin-antibody

    UCSB, MCDB 103

    Excerpt: ... rms characterized by electrophoresis and amino acid 2,3 sequence analysis. Four of them represent the differentiation markers of muscle tissues and two are found practically in all cells. There are three -actins (-skeletal, -cardiac and -smooth muscle), one -actin (-nonmuscle) and two -actins (-smooth muscle and -non-muscle). Actin isoforms show >90% overall sequence homology, but only 50-60% homology in their 18 NH2-terminal 4 residues. The NH2-terminal region of actin appears to be a major antigenic region, and may be involved in the interaction of actin with other proteins such as myosin. The actin in cells of various species and tissue origin is very similar in its immunological and physical properties. Therefore, a specific antibody to -actin provides a useful tool in studying the intracellular distribution of actin and the static and dynamic aspects of the cytoskeleton. Reagent Supplied as ascites fluid with 15 mM sodium azide as a preservative. Precautions and Disclaimer This p ...

  • 4 Pages

    Ch. 5, Part 1 Quiz

    Virginia Tech, CHEM 1035

    Excerpt: ... 6 mmHg. The simplest formula of the compound is NO2. What is the molecular formula of the compound? A) NO2 B) N4O8 C) N3O6 http:/highered.mcgraw-hill.com/classware/ala.do?alaid=ala_664409 (2 of 4)11/10/2006 7:09:44 AM ClassWare: D) N2O4 E) N6O12 Question 10 A sample of hydrogen gas was collected over water at 36 C and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (Vapor pressure of water is 44.6 torr at 36 C) A) 0.29 mol B) 4.69 mol C) 0.27 mol D) 2.35 mol E) 0.14 mol Question 11 The "air bags" that are currently installed in automobiles to prevent injuries in the event of a crash are equipped with sodium azide , NaN3, which decomposes when activated by an electronic igniter to produce nitrogen gas that fills the bag. How many liters of nitrogen, measured at 25 C and 1.00 atm, will be produced by 100.0 g of NaN3? Equation: 2NaN3(s) 2Na(s) + 3N2(s) A) 1.33 L B) 15.9 L C) 37.6 L D) 56.4 L E) 205 L Question 12 If the volume of a sample of gas ...

  • 3 Pages

    amine synthesis

    Weber, CHEM 2320

    Excerpt: ... Dr. Davies Chem. 2320 Amine Synthesis I. Synthesis of Primary (1o) amines - R-NH2 A. Addition of excess ammonia to a primary alkyl halide: B. Reductive amination: C. Reduction of amides: D. Addition of sodium azide to a primary or secondary alkyl halide, tosylate or epoxide: E. Cyanide additions followed by reduction: F. Gabriel amine synthesis (1887, Siegmund Gabriel, Berlin) G. Reduction of a nitro group: H. Hofmann Rearrangement (RAR): II. Synthesis of Secondary (2o) amines - R2NH A. Reductive amination (Reduce imine to a secondary amine): B. Reduction of a secondary amide: III. Synthesis of Tertiary (3o) amines - R3N A. Reductive amination (Reduce iminium ion to a tertiary amine) B. Reduction of a tertiary amide: C. Worth mentioning - Hofmann elimination produces a tertiary amine. See notes ...

  • 1 Pages

    Rastegarzadeh_Biotreatment_112

    Tulsa, IPEC 2006

    Excerpt: ... er is essential. No decrease in TPH concentration was observed for a control with 1% sodium azide , indicating that observed decreases in TPH under optimum conditions was due to biodegradation alone. No volatilization was observed under the conditions of this experiment. A separate volatilization experiment in open containers showed evaporation could contribute significantly to TPH loss in the field. ...

  • 12 Pages

    reactions2

    Penn State, CHEM 110

    Excerpt: ... unt of product Must start with a balanced reaction BE SURE TO TEST BOTH REACTANTS Limiting reactant problems can be solved by the table method by answering three questions: 1) How much product to I get if all of reactant A reacts? 2) How much product do I get if all of reactant B reacts? 3) Which product yields less reactant? That is the limiting reactant! Mary J. Bojan Page 10 Chapter 3 Problem Solving with solutions Sample Problem: Titration Molarity is the connection between moles and volume in solutions. If 46 ml of 0.1 M NaOH is needed to neutralize 20 ml of a H2SO4 solution, what is the concentration of H2SO4? Mary J. Bojan Page 11 Chapter 3 For a gas, PV=nRT is the link between the # of moles (n) and the experimental quantities P,V, and T of gas. Example: How many L of N2 at 735 mm Hg and 26C are produced from 126g of NaN3 ( sodium azide )? sodium azide gas in an airbag 2NaN3(s) 2Na(s) + 3 N2(g) mass P,V,T ideal gas law moles MW moles Mary J. Bojan Page 12 Chapter 3 ...

  • 3 Pages

    chap7

    Laurentian, BIOL 200601

    Excerpt: ... lac- tons azi = sodium azide gal = galactose ton = bacteriophage T1 str= streptomycin (an antibiotic) lac = lactose Experiment: Mix both strains of bacteria. At fixed intervals, remove cells and disrupt with a blender (or vortex) Select against Hfr cells (Why?) In this experiment: Plate each aliquot of cells onto medium containing str Record times at which donor alleles appear in the F- Difference in times between when alleles correlates with distance Eg: if a+ appears after 5 minutes and b+ appears after 8 minutes, what is the distance between these genes? Results: (Figure 7-9; 7-10) azi results: lac results: gal results: a) Low frequency of exconjugants b) enters late Map? Conclusions: 1) Hfr cells transfer DNA in a linear fashion starting from the origin of transfer 2) Genes close to the origin are more likely to be transferred resulting in recombinants 3) Genes further away from the origin are less likely to be transferred (why?) 4) The distance of a gene from the origin determines time taken to ...

  • 8 Pages

    2120149075

    Maryland, BSCI 207

    Excerpt: ... neration Proton Movement Accompanies eTransport: I, III, IV proton mumps (1.) (2.) (3.) (4.) (Alberts et al. Essential Cell Biology) I. III. IV. (5.) 1 Mitochondria: electron transport chain H+ H+ H+ Cytochrome oxidase is a proton pump H2O Reduce Cyt. oxidase For every O2 reduced to H2O) - Fe heme and Cu ions cooperate in passage of 4H+ and 4e- NADH eNAD+ H+ H+ H+ I e- UQ e- III e- Cyt c e- IV e- O2 eII Poisoning by CO, sodium azide , cyanide: Animals and bacteria cytochrome oxidase (complex IV) is inhibited by binding at heme side How Many Protons are moved? Exact number of H+ transported is unknown, but believed to be the following: 4 through complex I 4 through complex III 2 through complex IV Plants can tolerate cyanide poising, why? plant mitochondria have an alternate cyt. oxidase. Also, 2 H+ are removed from the matrix for every molecule of H2O generated when oxygen is reduced. 2 Summary: electron transporters I, UQ, III, Cyt c, IV, and proto ...

  • 3 Pages

    KEY_EXAMII_2008

    Rutgers, CHEM 209

    Excerpt: ... Seat Assignment: _KEY_ Elementary Organic Chemistry Chem 209 Exam II November 6, 2008 Name (print): _Spencer Knapp_ Name (sign): _ Student Number: _ Multiple Choice Answers (one letter per question, 3 points each) 5. _E_ 6. _E_ 7. _D_ 8. _A_ 9. _A_ 11. _B_ 12. _A_ 13. _C_ 14. _A_ 15. _A_ subtotal: _36_ 10. _E_ 16. _C_ Written Answer Questions (overpage, 4 points each): subtotal: _16_ Total: _52_ Abbreviations: PCC = pyridinium chlorochromate Ph = phenyl, C6H5 D = deuterium (heavy isotope of hydrogen) Please note: pencil is recommended! 1 Written Answer Questions (4 points each) 1. Draw in the box the structure of the product (= C4H9N3) of the SN2 reaction of 2-Rbromobutane with sodium azide (NaN3). Be sure to indicate stereochemistry. 2. Draw in the circle the structure of a carboxylic acid that is ...

  • 16 Pages

    Chem_208_Lecture_3_BW

    Cornell, CHEM 2080

    Excerpt: ... ling an Airbag? - Assume 333.4g Sodium Azide - N2 is produced at 60oC. W = -PexV 7 8 State Functions (Depends only on state): Altitude (h) Position (x,y) Pot. Energy (PE) Internal Energy (U) Path Dependent Function (depends upon path taken): Distance traveled (d) Heat transferred (q) Work done (w) Another statement of the First Law of Thermodynamics: U = Uf Ui = q + w U is a state function; q and w are not state functions 9 Bomb Calorimeter W = 0 (V = 0) U =q+w =q+0 = qv Ui qV U = qV Uf The heat of reaction measured In a bomb calorimeter (constant V) is the change in internal energy (U) 10 Reaction occurs under the constant pressure of the atmosphere P is constant, so if gases are formed, V will change: U = q + w = qp - PV Coffee-Cup Calorimeter Ui U = qP + w Uf = qP - PV 11 Closed Container V= 0, w = 0 Open Container P const, V 0 Ui Ui qP U = qV Uf U = qP + w Uf = qP - PV 12 Enthalpy (H) For reactions in open containers, we are in ...