Tetrasulfur dinitride formula. CuCl. Examples include beryllium nitride (Be 3 N 2), magnesium nitride (Mg 3 N 2), calcium nitride (Ca 3 N 2), and strontium nitride (Sr 3 N 2). gold(iii)-chloride. Learn the formula, name and molar mass of tetrasulfur dinitride, a compound of sulfur and nitrogen. 1444 g/mol. Rule 1. Identify the following compounds as either ionic or covalent and write their name or formula: a. What is it's formula? What is the formula for the ionic compound formed by calcium and selenium? Find step-by-step Chemistry solutions and your answer to the following textbook question: Write the molecular formula for each of the following covalent compounds: (a) sulfur hexafluoride (b) bromine pentafluoride (c) disulfur dichloride (d) tetrasulfur tetranitride. The latter, based upon the recently optimised geometry of Cѕ symmetry, used both a large basis set of greater than double zeta quality, together with configuration for both the ground state and the ionised states. Its chemical formula is S 4 N 4. Jun 24, 2017 · Explanation: Nitrogen has a subscript of two since sulfide's charge is 2-. H2 d. Tetrasulfur tetranitride (S4N4) is a heterocyclic compound with a planar tetrahedral structure. For example, a molecule of chlorine trifluoride, ClF 3 contains 1 atom of chlorine and 3 atoms of fluorine. Disulfur dinitride. diarsenic pentoxide d. 143 Da. Ni2Br b. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Spelling counts. Like the analogous tetrasulfur tetranitride S 4 N 4, Se 4 N 4 is an orange solid. Question: For each of the following questions, name or write the formula appropriately. 065 = 128. b. N3+ is bonded in a bent 120 degrees geometry to two S+1. KCl is the chemical formula of potassium chloride. A neutral atom contains equal numbers of protons and electrons. colourless crystals. Mg Pa -Ionic i. Step 1. 3384. ferric oxide, Fe2O3 B. ChemSpider ID 124788. New Providence School District / Overview M. Jan 1, 1972 · Tetrasulfur Dinitride, S4N2 Traces of this nitride, recognizable by its dark red color, are formed in many reactions involving sulfur-nitrogen compounds. S2F2. At last,Dinitrogen tetrasulfide() safety, risk, hazard and Identify the cation and anion for the following ionic compounds. Infobox references. This image of a simple structural formula is ineligible for copyright and therefore 1=Structure of tetrasulfur dinitride}} {{de|1=Struktur von Chemical formula. Gas phase ion energetics data. The nitrides of electropositive metals (including Li, Zn, and the alkaline earth metals) readily hydrolyze upon What is the chemical formula for cobalt(II) bromide? a. Convert between S4N4 weight and moles. Bulletin of the Chemical Society of Japan 1983 , 56 (9) , 2627-2630. What is the chemical formula of lead II decasulfide? Pb10S10 The prefix deca in decasulfide means that there are 10 sulfide ions in the Visit ChemicalBook To find more Tetrasulfur dibromide() information like chemical properties,Structure,melting point,boiling point,density,molecular formula,molecular weight, physical properties,toxicity information,customs codes. boron trichloridec. Thereby two primary intermediates and a secondary one (2−4) were detected, and their UV−vis and IR spectra were identified through specific interconversions of 1−4 that can be induced by Jul 2, 1975 · The first method is a three-step synthesis involving the use of tile salt Hg$ (NS) (refs. At last,Tetrasulfur dibromide() safety, risk, hazard and MSDS, CAS Tetraselenium tetranitride is the inorganic compound with the formula Se 4 N 4. cyclo-S 5: cyclo-pentasulfur: Not yet isolated, only detected in The Formation of Tetrasulfur Dinitride during the Mild Pyrolysis of Tetrasulfur Tetranitride. NaNO2. Enter a chemical formula to calculate its molar mass and elemental composition: Molar mass of S4N4 (Tetrasulfur tetranitride) is 184. 260. References. H2SO4 and more. Tetranitrogen tetrasulfide | S4N4 or N4S4 | CID 141455 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological Formula of Nonmetallic Compound: The formula of a binary compound made of nonmetals is written by placing the atomic symbol of the less electronegative atom at first, followed by the atomic symbol of the more electronegative atom. Rutherford discovered the atomic nucleus by bombarding gold foil with electrons. It easily evaporates. Edit. 950287 Da. The chemical formula of potassium chlorite is KClO₃. How do you reduce auric chloride to metallic gold? Auric chloride is reduced by carbon in accordance with the equation. Name the following compounds. Be sure to include the correct charge! Provide the correct name the following compounds. What is it's formula? S4N2 This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. More answers. Which of the following chemical formula is not correct for given chemical name? ferric oxide , Fe 2 O 3. an empirical formula c. We follow the basic rules to write the formula of the compound. 48 Tetrasulfur dinitride decomposes explosively when heated. Write the formula for each of the following molecular compounds given the name: (6. Visit ChemicalBook To find more Dinitrogen tetrasulfide() information like chemical properties,Structure,melting point,boiling point,density,molecular formula,molecular weight, physical properties,toxicity information,customs codes. a molecular formula b. Preparation. Write down the chemical formula for the following compounds. S2N2. 0067 = 28. It is comprised of sulphur (S) and nitrogen (N) with a molecular weight of 156. In an initial stage of the CI procedure we thus used a set of single root inputs corresponding to Created Date: 11/15/2016 9:41:29 AM Abstract The He (I) photoelectron spectrum of gaseous S4N2 is reported, and an assignment is made on the basis of the correlation with ab initio molecular orbital calculations. S (Sulphur/Sulfur) 4 × 32. (Still) More Naming Practice Write the names of the following chemical compounds: 1) BBr 3 2) CaSO 4 3) C2Br 6 4) Cr(CO 3)3 5) Ag 3P 6) IO 2 7) VO 2 8) PbS May 7, 2021 · HMDB is offered to the public as a freely available resource. Here, there are no suffixes before iodine and bromide. 14. There are 4 easy steps to find the molar mass of N2S4 based on its chemical formula. Zn(OH) -Ionic h. The nitrides of the alkaline earth metals that have the formula M 3 N 2 are however numerous. S 4 O 5. KEYWORDS (Audience): Second-Year Undergraduate. 5) a) Silicon hexachloride b) Phosphorous tribromide c) dicarbon hexabromide d) tetrasulfur dinitride. You can also browse global suppliers,vendor,prices,Price,manufacturers of Dinitrogen tetrasulfide(). 065. What is the formula for the ionic compound formed by calcium ions and nitrate jons? A) CajN B) Ca(NO3)2 C) CazNO) D) CazNO2 E) CaNOs 21. Find step-by-step Chemistry solutions and your answer to the following textbook question: pentasulfur dinitride chemical formula. (a) The provided name of the compound is “iodine bromide”. What is the chemical formula for Tetrasulfur pentoxide? SO. lithium fluoride 6. 2 minutes. The molecular formula for tetrasulphur dinitride is S4N2. Other articles where disulfur dinitride is discussed: nitride: Sulfur nitrides: …are tetrasulfur tetranitride, S4N4, and disulfur dinitride, S2N2, because they are precursors to an unusual polymer called polythiazyl, (SN)x. 265 V and S3 + e- S4N- + e- or S4N2- 2nd wave Further experiments are necessary to distinguish be- tween these possibilities. Still More Namin Practice Write the names of the following chemical compounds: 2) T CaS04 silver 6) C-102 ðìoxtdz 7) 8) PbS Write the formulas of the following chemical compounds: 1st Edition • ISBN: 9780547586632 Jerry L. 3: Example of some compounds that have multiple oxidation states. S N e. diboron hexahydride -Covalent g. KEYWORDS (Subject Ab initio configuration interaction calculations of the ground and singlet A′ and A″ excited states have been performed, with all possible single and double excitations from the 10 highest occupied orbitals to the lowest 17 virtual orbitals being included, the previous C s symmetry molecular structure being used. What is its formula? and more. To write the formula for Sulfur diiodide we’ll use the Periodic Table and follow so 4. disulfur difluoride. Some of the states can be identified with excitation from individual occupied Trisulfur Dinitride. It turns back into tetrasulfur tetranitride when exposed to water. The above chemical formula is the basis of Tetrasulfur. S N b. Dioxygen difluoride. Molecular Formula NS. Write the correct chemical formula for the following chemical compounds. It is however less soluble and more shock-sensitive than S 4 N 4. tetrasulfur dinitride , S 4 N 2. Formula: S 4; Molecular weight: 128. Wiki User. S 5 O 4. 52= 16. Molecular weight: 60. N2Br d. Question: 5. The results have been rationalized within an MO framework. 50- atoms. NH 4 Cl _____ Fe(NO 3 ) 3 _____ Aug 11, 2023 · Tetrasulfur dinitride. 4AuCl 3 + 6H 2O+3C = 4Au +12HCl+3CO 2. the sum of atomic masses of ALL Molar Mass, Molecular Weight and Elemental Composition Calculator. Use and re-distribution of the data, in whole or in part, for commercial purposes requires explicit permission of the authors and explicit acknowledgment of the source material (HMDB) and the original publication (see the HMDB citing page). Write the names of the following chemical compounds: 1) BBr3 . Our results show that the molecule should have the half-chair conformation, which is in good agreement with an X-ray crystallographic analysis. S N The correct answer is: S N 2 4 4 2 2 4 2 4 2. ChemSpider ID 124561. potassium chlorite , KClO 3. Mar 6, 2021 · What’s the formula for Tetrasulfur Dinitride? S4N2Tetrasulfur dinitride / Formula. molecular mass. 078. Note mercury (1) is not a monoatomic cation, but is really a homonuclear diatomic ion of two mercury atoms bound to each other, both having lost one electron. Dinitrogen-N-sulfide. Ground state energy level diagram and single root function excitation processes. The structure is zero-dimensional and consists of four 1,2,3,5,4,6-tetrathiadiazinane molecules. 01:07 b. H2O c. The first step to finding the molar mass of Tetrasulfur Dinitride is to count the number of each atom present in a single molecule using the chemical formula, N2S4: Element. Study with Quizlet and memorize flashcards containing terms like How many neutrons are there in an atom of lead whose mass number is 208?, An atom of the isotope sulfur-31 consists of how many protons, neutrons, and electrons?, A magnesium ion, Mg2+, has how many protons and electrons? and more. It does not dissolve in water. 3-grams per mole. Apr 28, 2022 · What is the chemical formula for tetrasulfur dinitride? The molecular formula for tetrasulphur dinitride is S4N2. dinitrogen trioxided. It contains sulfur in its +3 oxidation state. CoBr2. 5. So Hg 2 Cl 2 it the lowest whole number ratio of cation to anion. Answer and Explanation: 1 Feb 4, 2011 · The explosive properties of tetrasulfur tetranitride, S 4 N 4 , are reviewed and analysed. Cu,PO. Palmer Department of Chemistry, University of Edinburgh, Scotland Z. sodium nitrite. AgBr -Covalent e. Step 3. What is the cation in AuCl3? gold (iii) chloride. 20 seconds Oxygen Dinitride. P -Ionic f. Name Formula P2S. AgNO3. SN B D C A Aug 11, 2023 · S4N4 is the chemical formula of tetrasulfur tetranitride. 26. Binary Sulfur-Nitrogen Species a Cations Neutral Molecules b Anions SN + $2 N+ S4N; ~ S4N~ + S, N5 + SsN ~- $6N4 2+ The structure of the six-membered ring S4N2, which was predicted to be planar by a CND0/2 calculation, has been investigated by use of extended Hiickel calculations. CAS Registry Number: 19269-85-3. N4S4. S4N4 is the chemical formula of Tetrasulfur Dinitride. Notes. We would like to show you a description here but the site won’t allow us. 3 and 9) while the second entails the heating of tetrasulfur tetranitride, S4N4, and sulfur in CSZ in an autoclave' Both methods yield a complex mixture of products but are capable of producing pure S4NZ (ref. Only $35. The proton and the neutron have identical masses. Tetrasulfur tetranitride is an inorganic compound with the formula S4N4. S N c. Step 1 of 5. Naming Ionic Compounds Practice Worksheet Name the following ionic compounds:. Monoisotopic mass 183. This gold-poppy clarification needed coloured solid is the most important binary sulfur nitride, which are compounds that contain only the elements sulfur and nitrogen. CoBr3. Apr 30, 2010 · Determine its empirical formula Cr3 Si2 100. The element with the lower group number is written first in the name; the element with the higher group number is written second in the name. Figure2. 1 / 4. tin (IV)carbonate b. 00:53. silver nitrate. 2) CaSO4 3) C2B16 4) Cr(CO3)3 5) Ag3P 6) 102 7) VO2 8) Pbs 9) CHA 10) N203 Write the formulas of the following chemical compounds: 11) tetraphosphorus triselenide 12) potassium acetate 13) iron (11) phosphide 14) disilicon hexabromide 15) titanium (IV) nitrate 16) diselenium diiodide 17 Tetrasulfur Dinitride S4N2 Molar Mass, Molecular Weight. Formula: N 2 S 5. SnO2 is tin dioxide. S 3: trisulfur: A cherry red triatomic gas with a bent ozone-like structure. What is the name of PCl)? trichlorophosphide D) phosphorus chloride A) phosphorus trichloride E) phosphoric chloride B) phosphorus trichlorate C) 22. In this particular substance, 'penta-' indicates five sulfur atoms, while 'di-' indicates two nitrogen atoms. H. 287 Da. Tetrasulfur tetranitride undergoes a number of interesting reactions. Jan 1, 1981 · The values of E1/2 at - 20 OC and 25 "C are respectively -1. an ionic formula d. calcium oxide Cao-lonic f. 2,184 solutions. copper chloride. What is its formula? A. tetrasulfur dinitride -Covalent b. 3. N4Se4 stands for Tetranitrogen Tetraselenide. The S (sulfur) and N (nitrogen) atoms are covalently bonded to each other. Step-by-step solution. Question: 4. 3 2. It is a precursor to many S-N compounds and has attracted wide interest for its unusual structure and 39E. Provide the correct name for the following acids or bases. There are four sulfur atom based on the prefix -tetra. Molar mass. Ag. He b. ethylbenzene, 2-ethylnapthalene and 1,2-diphenylethane, react with S4N4 in refluxing xylene to give low yields of aryl-substituted thiadiazoles together with elemental sulfur and ammonia 〈67G1614, 65AG(E)239〉. Disulfur dinitride is produced by reacting elemental silver with tetrasulfur tetranitride. Sarquis, Mickey Sarquis. It is explosive, similar to tetrasulfur tetranitride. 1 Pentasulfur Dinitride. Therefore, the chemical formula of the compound NS2 crystallizes in the tetragonal P4_2nm space group. It reacts with various heterocyclic compounds to form new ring systems, such as trithiadiazines, thiadiazoles, and dithiazoloquinolines. The corresponding number of atoms is placed as the subscript of each atomic symbol. Co3Br2 sulfur nitride, $5N6, was first identified in 1978 17~, and d) although tetrasulfur dinitride, SaN v has been known since 1897, the structure was not unequivocally determined until 1981 18) TaMe 1. . Study with Quizlet and memorize flashcards containing terms like If you are naming a binary compound that contains sulfur and fluorine, which element should be listed first in the formula?, Which of the following endings is used for monoatomic anions?, Magnesium sulfate is commonly sold as epsom salt. NBr2, An example of a binary compound is a. Naturforsch. S4N2 (tetrasulfur dinitride) Upgrade to remove ads. 00L - 73. Oct 29, 2011 · Tetrasulfur dinitride (S 4 N 4) reacts readily with alkynes in various organic solvents, forming the 1,3,2-dithiazole radicals 62 [30,44]. This indicates that there is one iodine and one bromine atoms are present. Weight: Mole: S 3 N 2 Molar Mass Conversion in Batch Jun 2, 2014 · Ab initio configuration interaction calculations of the ground and singlet A′ and A″ excited states have been performed, with all possible single and double excitations from the 10 highest Nov 27, 2022 · Explanation: The question asks for the formula of pentasulfur dinitride. 5. 4SN d. Use the molar mass converter to calculate the weight and mole of S4N2. See Answer. Multiple Oct 21, 2023 · Study with Quizlet and memorize flashcards containing terms like The formula H2O2 is an example of a. Answer link. An atomic nucleus contains equal numbers of protons and neutrons. 38 a, 74-77 (1983); received August 9, 1982 rasulfur dinitride, S4N2, has proven the most difficult to char- acterize structurally. Provide the formula for each of the following binary molecular compounds:(a) dinitrogen pentaoxide(b) carbon tetrachloride(c) iodine monobromide(d) dihydrogen sulfide. 81. Number of Atoms. Co2Br3. It also contains nitride ions. tricopper dinitride. The structures of related Aug 9, 2023 · Best Answer. 7). Unlock. -Ionic d. Sulfur trioxide d. ∙ 9y ago. Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on. 9. This involves a chemistry concept known as the naming of chemical compounds. N3 E. Other data available: Gas phase thermochemistry data. 250 mole common antiacid, calcium carbonate? Tetrasulfur tetranitride is an inorganic compound with the formula S 4 N 4. N 2 S 5 Molar Mass Converter. S 4 O. Tetrasulfur trinitride decomposes explosively when heated. The compound was first What is the chemical formula for Tetrasulfur pentoxide? SO. Formula: S 4. Write chemical formulas for the following binary molecular compounds. tetrasulfur dinitride, S4N2 B. Question 8 (4 points) Listen Which of the following chemical formula is not correct for given chemical name? O iron oxide, Fe2O3 tetrasulfur dinitride, S4N2 O lead (IV) iodide , Pbl potassium chlorite , KCIO2 song Question on What is its formula? Select one: a. There is one shorter (1. 4SN2 D. Formation of a 1,3,2-Dithiazole Ring by Transformation of Another Ring Dec 26, 2020 · S 4 N 4 is an explosive compound with an impact sensitivity comparable to pentaerythritol tetranitrate (PETN) (E i = 4 J) but a friction sensitivity equal or even lower than lead azide (F = 0. In addition, there are two nitrogen atoms based on the prefix -di. The S₄N₂ has an extreme cradle structure. 58 Å) and one longer (1. About Quizlet; How Quizlet works; Careers; Advertise with us; Get the app; For The Electronic Spectrum and Structure of Tetrasulfur Dinitride Michael H. tetrasulfur dinitride SIF titanium (IV) chloride SIC dinitrogen trioxide CoCl2:51,0 barium fluoride Na, tetraphosphorous pentaoxide SnF vanadium(III) iodide CS nickel(II) sulfate dihydrate K 50, disulfur Dichloride NH,HCO, silicon hexafluoride The chemical formula of tetrasulfur dinitride is S₄N₂. Formula: N 2 S. 485 V and -1. Molar Mass: 124. Get control of 2022! Track your food intake, exercise, sleep and meditation for free. c. Appearance. 92. N_2S Nitrogen has a subscript of two since sulfide's charge is 2-. 1. The chemical formula of Tetrasulfur tetranitride shown above is based on the molecular formula indicating the numbers of each type of atom in a molecule without structural information, which is different from the empirical formula which provides the numerical proportions of atoms of each type. Thus, the molecular formula for tetrasulfur dinitride is S 4 O 2 \mathrm{S_{4}O_{2}} S 4 O 2 . 260; CAS Registry Number: 19269-85-3; Information on this page: Gas phase thermochemistry data; References; Notes; Other data available: Gas phase ion energetics data; Vibrational and/or electronic energy levels; Data at other public NIST sites: Gas Phase Kinetics Database; Options: Switch to Tetrasulfur dinitride c. 7. S4N4 is the chemical formula of tetrasulfur tetranitride. titanium (IV) nitrate -Covalent C. Write the formula of Complete the table below. CAS Registry Number: 56400-02-3. Multiply the number of atoms by the atomic weight of each element found in steps 1 and 2 to get the mass of each element in N2S4: Molar Mass (g/mol) N (Nitrogen) 2 × 14. About us. 00 Remove flag Select one: O a manganese(II) hydroxide / Mg(OH)2 Ob ammonium bromide / NH Br Oc lithium carbonate / Li>CO3 O d. Although the compound can be prepared by a variety of method^,^ its low melting point (23 “C) and susceptibility to rapid thermal decomposition upon melting has made its manipulation an onerous task. This gold-poppy coloured solid is the most important binary sulfur nitride, which are compounds that Tetrasulfur. calcium hydroxide , Ca (OH) 2. d. Count The Number of Each Atom. Multiple Choice. Average mass 92. tetrasulfur dinitride / S«N2 O e potassium nitrate / KNO; NE Previous page C1. an organic formula, The chemical formula for nickel (II) bromide is a. Previous question Next question. Formula: S 3 N 2. The localized molecular orbital structures of disulfur dinitride and tetrasulfur dinitride have been Tetranitrogen tetrasulfide. some binary molecular compounds name chemical formula sulfur diiodide pentasulfur dinitride sulfur monochloride srlfur tetrachloride Explanation. Agua. To elucidate the multifaceted but poorly understood chemistry of the pivotal polysulfur−nitrogen heterocycle, tetrasulfur tetranitride (S4N4, 1), its photochemistry was studied in Ar matrices. Hence option D is the correct D) E) 20. Disulfur dinitride is the chemical compound with the formula S 2 N 2 . Tetrasulfur dinitride decomposes explosively Classify the ionic and covalent compound. potassium chlorite , KCIO3 9. You can also browse global suppliers,vendor,prices,Price,manufacturers of Tetrasulfur dibromide(). The reduction of 1,3-tetrasulfur dinitride was studied by polarography and by voltammetry at the rotating and the stationary platinum electrodes. Hence option C is incorrect. Answer. S₂N4 B. Molecular weight: 128. Dihydrogen The chemistry of sulfur-nitrogen compounds has several features of interest and importance: stability of the sulfur-nitrogen bond, tendency to form six- and eight-membered rings, ring contraction, polymerization, and negative ion formation. none of above. Sep 8, 2023 · Write the formula for each of the following molecular compounds:a. Tetrasulfur dinitride c. We know that rule for writing the formula of a binary compound by placing the atomic symbol of the l View the full answer Step 2. To determine the chemical formulas, use the prefixes and kinds of molecules in each formula name. ∙ 8y ago. Tetrasulfur dinitride decomposes explosively when Formula/name Common name Other names Notes S 2: disulfur: A diatomic gas with a triplet ground state like dioxygen. S 4: tetrasulfur: Structure not determined but calculations indicate it to be cyclo-S 4. Average mass 184. 66 Å) N–S bond length. 0134. NiBr2 c. a. Since we desired to study the reactions of The Formation of Tetrasulfur Dinitride during the Mild Pyrolysis of Tetrasulfur Tetranitride. Bromine monochloride b A binary covalent compound is composed of two different elements (usually nonmetals). 2084. Hence, the chemical formula for pentasulfur dinitride is S5N2. This polymeric sulfur nitride is unusual because, even though it is composed solely of two nonmetals, it exhibits some properties normally associated only with metals Jul 19, 2020 · In this video we'll write the correct formula for Sulfur diiodide (SI2 ). 99/year. gold(+3) cation trichloride. Information on this page: Notes. S4N2 was first properly characterized in 1951 (78),although it had been known, in am impure state, since 1896. Weight: Mole: N 2 S 5 Molar Mass Conversion in Batch. Monoisotopic mass 91. The Disulfur dinitride is a colorless crystalline solid. S 3 N 2 Molar Mass Converter. 900574 Da. What is the mass in grams of 0. KEYWORDS (Domain): Inorganic Chemistry. Vibrational and/or electronic energy levels. SAN2 C. Molar Mass: 188. Apr 30, 2010 · Tetrasulfur dinitride decomposes explosively when heated. As determined by X-ray crystallography, Se 4 N 4 adopts a cage structure similar to that of S 4 N 4. Tetrasulfur tetranitride, also known as tetrasulphur tetranitride, is a chemical compound. Tetrasulfur tetranitride. calcium hydroxide, Ca(OH)2 C. Example 2. 32. This is a 6 membered ring compound and as it does not contain a nitride unit some chemists prefer to call it tetrasulfur dinitrogen. sulfur hexafluoride. Information on this page: Gas phase ion energetics data. Compute Mass of Each Element. Which of the following chemical formula is not correct for given chemical name? A. oxygen difluorideb. 2868 g/mol. 1 pt. e. Question: Question 3 Which one of the following is an INCORRECT name/formula pair? Not yet answered Marked out of 1. The two atoms present in the compound are iodine and bromine. Palmer The Electronic Spectrum and Structure of Tetrasulfur Dinitride 75 8a 12a'--\ lOa' 6a"/: IT hOO O 3 -0 6 Fig. qg lr tu lj fp wg ao yo tj ad