Q: Pick all of the symmetric resonance structures of the SO2 molecule. A: When bonding is represented in a molecule using various structures which develop into a hybrid… Q: Place the species B2+, B2, and B2- in prder of increasing bond …A)all the resonance structures are observed in various proportions B)the same atoms need not be bonded to each other in all resonance forms C)there cannot be more than two resonance structures for a given species D)one always corresponds to the observed structure E)the observed structure is an average of the resonance forms 1)Jan 30, 2023 · For resonance structures, the skeleton of the molecule (or ion) stays in the same relative position, and only distributions of electrons in the resonance structures are different. Let us return to the \(\ce{SO2}\) molecule. The molecule has a bent structure due to the lone pair of electrons on \(\ce{S}\). SO2 has a resonance structure and isn’t permanently bonded. Does SO3 have any resonance structures? Expert Answer There are three double covalent bonds …Question: Draw all possible resonance structures for SeO2, SeO32-, and SeO. Use the resonance structures to solve the problems below. (a) Arrange these species in order of increasing Se-O bond length (shortest bond first). SeO SeO2 (SeO3)2- Correct: Your answer is correct. (b) Match each species with the number of covalent bonds predicted by ...PROBLEM 4.2. 4. Methanol, H 3 COH, is used as the fuel in some race cars. Ethanol, C 2 H 5 OH, is used extensively as motor fuel in Brazil. Both methanol and ethanol produce CO 2 and H 2 O when they burn. Write the chemical equations for these combustion reactions using Lewis structures instead of chemical formulas. Answer.Write the Lewis structures for the following, and include resonance structures where appropriate. Indicate which has the strongest carbon-oxygen bond. (a) CO 2 (b) CO. 61. Toothpastes containing sodium hydrogen carbonate (sodium bicarbonate) and hydrogen peroxide are widely used. Write Lewis structures for the hydrogen carbonate ion and ...An MRI scan is a medical test that uses a magnetic field and radio waves to create a detailed picture of organs and other structures inside the body. MRI stands for magnetic resonance imaging.By understanding the basics of BrO3- Lewis structure, we gain insights into the molecular geometry, valence electrons, formal charge, lone pairs, and adherence to the octet rule.This knowledge is essential in the study of chemical bonding, resonance structures, VSEPR theory, covalent bonding, molecular orbital theory, electron pair geometry, bond angles, polar and nonpolar molecules ...Resonance is a method of describing delocalized electrons, electrons that do not belong to a single atom but to a conjugated system, within certain molecules where the bonding cannot be expressed by one single Lewis structure. A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures).The 1950s were a golden era for music, with an explosion of new genres and unforgettable melodies that continue to resonate with audiences today. From rock ‘n’ roll to doo-wop, the 50s produced some of the most iconic songs in history.Question: Which of the following molecules has two charge-minimized lewis resonance structures N2O (N is the central atom) H2O H2O2 CH4 SO2. Which of the following molecules has two charge-minimized lewis resonance structures. N2O (N is the central atom)Resonance and resonance hybrid structures of O3, SO3, SO2, CO3-2, SO4-2, PO4-2,NO3-. he phenomenon of resonance was put forward by Heisenberg to explain the properties of certain covalent molecules. Most covalent molecules have a unique Lewis formula (dot structure), which explains the bonding in that molecule.Which of the following are resonance structures for SO2? 0: ;0 S S . 1 2 ö s=0 S رن 4 A 1 and 2 B 2 and 4 C) 3 and 4 D 1,2, and 3 E 2,3 and 4 This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts.Question: Draw all of the Lewis structures of NO2+ which obey the octet rule and use this Lewis structure or these resonance structures to predict how many covalent bonds connect each oxygen atom in the real structure to the central N atom. Assume that the octet rule is followed for the N atom when you draw your structure(s). Pick the correct statement from theDraw all possible resonance structures for S3, [SO3]2-, and SO2. Use the resonance structures to solve the problems below. (b) Match each species with the number of covalent bonds predicted by the Lewis structures to exist between an S atom and an O atom bonded to this S atom. Options are 1.00, 1.33, 1.50, 2.00 or 3.00. ** (SO2 and SO3 don't ...These structures are called resonance structures. For SO2, two resonance structures can be drawn, one with a double bond and one with a single bond between the sulfur and each oxygen atom. The actual structure of SO2 is a hybrid of these two resonance structures. How does the VSEPR theory help in determining the shape of a molecule from its ...Arguably, one could construct a resonance structure where only the third lone pair on one oxygen forms a pi bond, but that is less stable of a resonance structure. The most stable resonance structure has two double bonds. And in fact, sulfur can do this because it has 3d orbitals to utilize. ... Draw the Lewis structure for sulfur dioxide, SO2 ...In lewis structure of PO 43- ion, there are three lone pairs (in the last shell) in three oxygen atoms and that oxygen atoms. Also, those oxygen atoms have a -1 charge on each atoms. There is another oxygen atom. That oxygen atom is connected to the phosphorous atom by a double bond has two lone pairs in its last shell.Bond Length. 6 mins. Resonance. 23 mins. Dipole Moment - I. 19 mins. Dipole Moment - II. 18 mins. Different Types of Polar Compounds.Science. Chemistry. Chemistry questions and answers. When drawing the most favorable resonance structures for the molecule SO2, what would be the formal charge on the sulfur atom? 3 1 02 0.Resonance is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by a single Lewis formula. A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or resonance contributors).Question: Which of the following molecules has two charge-minimized lewis resonance structures N2O (N is the central atom) H2O H2O2 CH4 SO2. Which of the following molecules has two charge-minimized lewis resonance structures. N2O (N is the central atom)Re: Is SO2 a resonance structure. The most stable Lewis structure would involve two double bonds, with the sulfur in the center, and the oxygens on the sides; each atom would have a formal charge of 0 (take note that the central S also has a lone pair using expanded valence shells) and the structure would not have resonance as there is only one ...However, since the question specifically asks for three resonance structures, you should also include the two resonance structures that have 1 single bond and 1 double bond between the S and each O, even though they aren't the most stable structures.Resonance is a mental exercise within the Valence Bond Theory of bonding that describes the delocalization of electrons within molecules. It involves constructing multiple Lewis structures that, when combined, represent the full electronic structure of the molecule. Resonance structures are used when a single Lewis structure cannot fully ...Sulfur dioxide, or SO_2, has two resonance structures which contribute equally to the overall hybrid structure of the molecule. However, a third Lewis structure can be drawn for SO_2 which is more stable in theory, but doesn't quite match …Resonance Structures of Carbonate (CO 32−) Ion. Carbonate ion is a common polyatomic ion found in limestone, baking powder and baking soda. Addition of acid to the carbonate ion causes the formation of carbonic acid, which decomposes rapidly into water and carbon dioxide. In baking the carbon dioxide that is released causes bread to rise and ...We also seek conciseness and, by agreement, draw one of many resonance structures. --Smokefoot 22:47, 3 September 2007 (UTC) Reply . Career and PhD chemists with years of experience may not need Wikipedia to specify different forms of SO2, but neophytes who are our most likely readers are looking for basic and comprehensive details.The formal charge on the "SO"_2 molecule is zero, but the formal charge on each atom depends on the Lewis structure that you draw. > You can draw three Lewis structures for "SO"_2. The actual structure is therefore a resonance hybrid of all three structures. In calculating the formal charge, each atom "gets" all of its lone pair electrons and half of its bonding electrons. The formal charge is ...Chemistry questions and answers. Draw the Lewis structure for SO2−4. Be sure to include all resonance structures that satisfy the octet rule. Question: Draw the Lewis structure for SO2−4. Be sure to include all resonance structures that satisfy the octet rule. Draw the Lewis structure for SO2−4. Be sure to include all resonance structures ...Chemistry. Chemistry questions and answers. Draw all resonance structures for the sulfur dioxide molecule, SO2. • Explicitly draw all H atoms. • Include all valence lone pairs in your answer. • Do not include overall ion charges or formal charges in your drawing. . Do not draw double bonds to oxygen unless they are needed for the central ...Dinitrogen pentoxide is an strong acidic oxide and nitrogen atom is at +5 oxidation state. Here we are going to draw lewis structure and resonance structures of N 2 O 5 molecule.. Drawing the lewis structure of N 2 O 5. skeletal structure of N 2 O 5 molecule is below. We are going to find, how σ bonds, π bonds and lone pairs are located in this molecule.This chemistry video tutorial explains how to draw the lewis structure of SO3 also known as Sulfur Trioxide. It discusses the molecular geometry, bond angle...Create an account to view solutions. Find step-by-step Chemistry solutions and your answer to the following textbook question: Draw the Lewis structure for the sulfur dioxide (SO$_2$) molecule. Be sure to include all resonance structures that satisfy the octet rule..Which compound has resonance structures? A. C X 6 H X 12. B. C H X 3 C H O. C. N a B r. D. N a X 2 C O X 3. The answer key says D is correct, but I do not understand why N a X 2 C O X 3, which is an ionic compound between the polyatomic ion carbonate and sodium, can have resonance structures. The other choices are equally …Using Formal Charge to Predict Molecular Structure. The arrangement of atoms in a molecule or ion is called its molecular structure.In many cases, following the steps for writing Lewis structures may lead to more than one possible molecular structure—different multiple bond and lone-pair electron placements or different arrangements of atoms, for instance.By understanding the basics of BrO3- Lewis structure, we gain insights into the molecular geometry, valence electrons, formal charge, lone pairs, and adherence to the octet rule.This knowledge is essential in the study of chemical bonding, resonance structures, VSEPR theory, covalent bonding, molecular orbital theory, electron pair geometry, bond angles, polar and nonpolar molecules ...842. A resonance form is another way of drawing a Lewis dot structure for a given compound. Equivalent Lewis structures are called resonance forms. They are used when there is more than one way to place double bonds and lone pairs on atoms. Resonance structures arise when there are more than one way to draw a Lewis dot diagram that satisfies ...Question: Drawing Lewis and Resonance Structures Name: Total Chemical Formula Valence Electrons Lewis and Resonance Structures (Chemical formulas with the symbol (R), have 2 or 3 resonance structures) HO CCL HCN NI SO2 (R) CCIO (R) NEXT PAGEI quickly take you through how to draw the Lewis Structure of SO3 2- (Sulfite Ion) . I also go over hybridization, shape and bond angles.The answer is, no, certain resonance hybrid contribute to the molecule’s structure to a greater degree than others. The more stable resonance structures contribute more so to the resonance hybrid than do the less stable ones. Stable resonance structures features include having fulfilled octets and absent formal charges.An MRI scan is a medical test that uses a magnetic field and radio waves to create a detailed picture of organs and other structures inside the body. MRI stands for magnetic resonance imaging.5 Steps to Draw the Lewis Structure of SO4 2- ion Step #1: Calculate the total number of valence electrons. Here, the given ion is SO4 2-.In order to draw the lewis structure of SO4 2-ion, first of all you have to find the total number of valence electrons present in the SO4 2-ion. (Valence electrons are the number of electrons present in the outermost shell of an atom).Resonance hybrid is a compound, molecule, ion, or radical exhibiting resonance and having a structure represented in the written form as the average of two or more structural formulas separated each from the next by a double-headed arrow. For example: The most common one is benzene: Also, very good example is: Answer link. …Sulfite ion is a weak base, but does undergo some hydrolysis to produce basic solutions. In acidic solution, the equilibria are shifted to form sulfurous acid, resulting in the evolution of SO2 gas. Sulfur dioxide is a colorless gas with a characteristic choking odor. SO2−3 (aq) +H2O(l) ↽−−⇀ HSO−3 (aq) +OH−(aq) SO 3 2 − ( aq ...SO2 Explicitly draw all H atoms. Include all valence lone pairs in your answer - Do not include overall ion charges or formal charges in your drawing - Do not draw double bonds to oxygen unless they are needed for the central atom to obey the octet rule. - Draw one structure per sketcher. Which of the following are resonance structures for SO2? 0: ;0 S S . 1 2 ö s=0 S رن 4 A 1 and 2 B 2 and 4 C) 3 and 4 D 1,2, and 3 E 2,3 and 4 This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts.Sulfur dioxide (SO2) is a non-inflammable colorless gas. SO2 is usually oxidized by ozone and hydrogen peroxide to form sulfur trioxide, a secondary pollutant that is extremely soluble in water. Droplets of sulfuric acid (acid rain) are formed when sulfur oxides are present in the atmosphere. The production of SO2 originating from coal-fired power plants and other fossil fuel combustion is ...A step-by-step explanation of how to draw the SO4 2- Lewis Dot Structure (Sulfate ion).For the SO4 2- structure use the periodic table to find the total numb...Clear 0 - s - O A Lewis structure of SO2 is shown. so, has one other resonance structure that does not violate the octet rule. A partically completed resonance structure of this molecule is shown. Complete the other resonance structure by dragging bonds and lone electron pairs to their appropriate positions. When complete, click Check. Problem ...Sulfur dioxide, or SO2 , has two resonance structures which contribute equally to the overall hybrid structure of the molecule. How many bonds are in co32? …Homework 1. 1. Write Lewis structures for the molecules or ions shown below. Show all resonance structures, including those that follow the octet rule (if possible) and the minimum formal charge rule. Do not include structures that are ionic. Indicate which structure (s) will be the lowest energy. Explain your reasoning.Question 26 incorrect Mark 0.00 out of 100 The Lewis structure for Sulfur dioxide can be described by two resonance structures: :0:: 5:0:- :0:8::0: These resonance structures indicates that the Select one: a. so, …M8Q3: Resonance Structures and Formal Charge Introduction. This section explores resonance structures for molecules and polyatomic ions and how the contribution of each resonance form can be assessed using formal charge. In many cases, more than one valid Lewis structure can be drawn for a given molecule. In these cases, the actual electronic ...Question: Complete the Lewis structures of SO2 and SO3. Be sure to draw only the resonance form with the lowest formal charges (zero) on all atoms. Do not add the formal charges to the structures. Then predict the solubility of the structures. Complete the Lewis structures of SO 2 and SO 3. Be sure to draw only the resonance form with the ...Q: ne formal charge on the sulfur atom in the resonance structure of sulfur dioxide (SO2) which has one… A: Q: Use formal charges to select which of these Lewis structures is the best for CCLOF.Question: Draw the Lewis structure of a SO2 molecule and state the number of potential resonance structures for this molecule (none, two, three, four, etc.) Type your answer and submit Unanswered • 2 attempts left Submit Resonance Structures Homework . Unanswered Draw the Lewis structure of a SO3 molecule and state the number of potential resonance structures for thisUnlike O3, though, the actual structure of CO32− is an average of three resonance structures. How many resonance structures can be drawn for SO2? Sulfur dioxide, or SO2, has two resonance structures which contribute equally to the overall hybrid structure of the molecule. However, a third Lewis structure can be drawn for …Study with Quizlet and memorize flashcards containing terms like Resonance structures differ by, Based on the octet rule, boron will most likely form a ________ ion., A valid Lewis structure of ________ cannot be drawn without violating the octet rule. SO42- PF3 IF3 SbF3 NF3 and more.Write the resonance structures for SO3, NO2 and NO3- . asked Oct 4, 2017 in Chemistry by jisu zahaan (30.0k points) chemical bonding and molecular structure; cbse; 0 votes. ... PCl3, SO2, SO3,NO2, SF4,NO ,BF3 , H2S, SF6. asked Nov 27, 2020 in Chemistry by Panna01 (47.6k points) chemical bonding; molecular structure;Answered: Draw two resonance structures that… | bartleby. Science Chemistry Draw two resonance structures that describe the bonding in SO2. Then describe the bonding in this compound using MO theory. How does MO theory rationalize the bond order of 1.5 for the two S-O bonds in this compound. Draw two resonance structures that describe the ...SO2 Resonance Structures The sulfur dioxide SO 2 Lewis structure is shown below. This is a correct Lewis structure. There is a central sulfur …Chemistry questions and answers. Draw all reasonable resonance structures for each species. a. O_3 b. NO_3^- (a central N atom) c. N_3^- Consider compounds A-D, which contain both a heteroatom and a double bond. (a) For which compounds are no additional Lewis structures possible?You'll get a detailed solution from a subject matter expert that helps you learn core concepts. See Answer. Question: Draw the Lewis structure for the sulfur dioxide (S02) molecule. Be sure to include all resonance structures that satisfy the octet Ċ 0: с 0 o=s=0 a X ?Structure and bonding: 2.24 - Resonance. Background. Lewis structures give us a model of where the electron pairs are in the valence shell of atoms and molecules. Thevalence shell electron pair repulsion theory then extends our ability to explain and predict the shapes of molecules. However, there are limitations to the VSEPR theory, such as ...This is a carbonate ion. A resonance structure means that there are more than one way to draw the ion. First, determine the total number of electrons available: 1 Carbon - 4 3 Oxygen - 6 (3) = 18 And the charge of -2 gives you an additional 2 electrons. Hence, there are 24 electrons in total (4+18+2=24) Carbon would be in the middle which gives ...What is the resonance structure for SO2 according to Lewis theory? According to Lewis theory, the resonance structure for SO2 involves the movement of electron pairs within the molecule. In the case of SO2, the double bond can be formed between either of the oxygen atoms and the sulfur atom. 1) Three atoms in a A=B-C where C is and atom with a p orbital. There are two major resonance possible. The two structure differ in the lcoation of the double bond. The anion, cation, or radical is stabilized by declocaliztion.25-May-2019 ... SO2 is kinda weird. We have these things called resonance structures and it turns out SO2 has three of them. O-S=O, O=S-O and O=S=O. We use ...Cl. 2. (Sulfuryl chloride) Lewis Structure. Sulfuryl chloride (SO 2 Cl 2) contains one sulfur atom, two chlorine atoms and two oxygen atoms. In SO 2 Cl 2 lewis structure, there are two double bonds between sulfur atom and oxygen atoms. Between sulfur and chlorine atoms, there are single bonds. No lone pairs exist on sulfur atom.The resonance hybrid has two identical N-O bonds. They share a double bond and a single bond between them, so the average bond order is 1.5. We would predict that the N-O bond length should be halfway between a single bond and a double bond. The N-O single bond length is 136 pm. The N=O double bond length is 115 pm. The bond lengths in the ...The Lewis structures that result from moving electrons must be valid and must contain the same net charge as all the other resonance structures. The following example illustrates how a lone pair of electrons from carbon can be moved to make a new \(\pi\) bond to an adjacent carbon, and how the \(\pi\) electrons between carbon and oxygen can be ...SO2 Resonance Structures The sulfur dioxide SO 2 Lewis structure is shown below. This is a correct Lewis structure. There is a central sulfur atom (S) with: a singled bonded oxygen atom, a double bonded oxygen atom, and a pair of dots shown on top. Would it work the other way, with the double bond going right? Again, of course it would.We can draw N 2 O resonance structures to identify the most stable structure of N 2 O. Oxidation numbers of nitrogen in N 2 O is decided from most stable structures. Finally we build the shape of N 2 O molecule.. N 2 O resonance structures. Electronegativity of oxygen is higher than nitrogen. This means a negative charge on oxygen atom is more stable than a negative charge on nitrogen atom.Guidelines to follow. To draw all resonance structures, take the lewis structure we drawn by using VESPR rule. In resonance structures, it does not require to show transformation of electrons by arrows. But, to identify each resonance structures, it is good to show arrows. In following examples, arrows are used to show electrons transformation.The electronic structure of the SO2 molecule is best represented as a resonance hybrid of two equivalent structures. SO2 molecule has two different types of pi bonds (p π − p π) and (p π − d π) . But even then both of S-O bonds are identical. Hence, SO2 molecule is resonance hybrid of two structures.The resonance hybrid has two identical N-O bonds. They share a double bond and a single bond between them, so the average bond order is 1.5. We would predict that the N-O bond length should be halfway between a single bond and a double bond. The N-O single bond length is 136 pm. The N=O double bond length is 115 pm. The bond …$\ce{SO2}$ is a bent molecule with C 2v symmetry point group. A valence bond theory approach considering just s and p orbitals describes the bonding in terms of resonance between two resonance structures: The sulfur-oxygen bond has a bond order of 1.5 and does not invoke d orbital participation. In terms of electron-counting formalism, the ...There are three resonance structures SO3 (Sulfur trioxide). We start with a valid Lewis structure and then follow these general rules. Note that SO3 is a bi...Step 3. Combine each atom with a single bond to the central atom by contributing one electron from each atom for the bond. Step 4. Count the electrons in the valence shell to check if the octet is completed. The carbon atom needs one more electron, and each oxygen atom needs one more electron to complete the octet. Step 5.Description. Sulfur-dioxide-resonance-2D.svg. Resonance structures of the sulfur dioxide molecule, SO 2. Computational chemistry has found that an expanded d-orbital model is not a very stabilising interaction and therefore not an important contributor to bonding in SO2, hence its omission in this image. Date.Draw all the resonance structures for the following molecules or ions: NO3- NO2- NO2 CO32- O3 SO2 SO42- PO43- This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts.Resonance is a mental exercise and method within the Valence Bond Theory of bonding that describes the delocalization of electrons within molecules. It compares and contrasts two or more possible Lewis structures that can represent a particular molecule. Resonance structures are used when one Lewis structure for a single molecule cannot fully describe the bonding that takes place between ...Create an account to view solutions. Find step-by-step Chemistry solutions and your answer to the following textbook question: Draw the Lewis structure for the sulfur dioxide (SO$_2$) molecule. Be sure to include all resonance structures that satisfy the octet rule..1 Answer. There are two ways to think of charge separation and both make resonance structures less stable: Moving electrons from a bond to a single atom to generate a cation/anion pair. For example: Moving double bonds to separate opposite charges. For example: Usually, however, the first way is meant.This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Which of the following does not have resonance structures? (1) SO2 (2) NO3- (3) NO2- (4) C6H6 (5) O3 (6) CO32- Group of answer choices A- All of them have the resonance structures.The formal charge on the "SO"_2 molecule is zero, but the formal charge on each atom depends on the Lewis structure that you draw. > You can draw three Lewis structures for "SO"_2. The actual structure is therefore a resonance hybrid of all three structures. In calculating the formal charge, each atom "gets" all of its lone pair …Study with Quizlet and memorize flashcards containing terms like Which of the following substances will display an incomplete octet in its Lewis structure? Cl2 ICl NO SO2 CO2, Elements that can accommodate more than eight electrons in their valence shell occur in period _____ and above. 5 2 3 4, Based on formal charge considerations, the electron-dot structure of CO32- ion has three resonance ...The molecule sulfur dioxide SO2 has two important resonance structures: Based on this, the bond order in the resonance hybrid is 1.333 1.5 1.0 one double and one single 2.0 1.67 Question: The molecule sulfur dioxide SO2 has two important resonance structures: Based on this, the bond order in the resonance hybrid is 1.333 1.5 1.0 one double and ...Draw resonance structures for the following species. Draw all possible resonance structures for SO2, SO3^{2-}, and SO. Draw resonance structure for the below-mentioned molecule. Draw two resonance structures for the nitrosonium ion, NO+. Draw the resonance structure of the following substance. Draw the resonance structure of this substance.Organic Chemistry GIFS: Some Animated GIFS Of Curved Arrow Notation In Interconverting Resonance Forms GIFS , Sulphur dioxide, or SO 2, has two resonance structures which contribute equally to the overall hybrid structure , The hybrid structure of SO2 S O 2 is shown below:-. The negative charge will split among two oxygen atoms. Hence, the, Subtract this number from the number of valence electrons for, This chemistry video tutorial explains how to draw the lewis structure of NO2-, the Nitrite ion.My Website: https://www, The actual structure of SO2 is an average, or a resonance hybrid, of the two structures. Althoug, Expert Answer. The number of resonance structures for the sulfur dioxide (SO2) molecule t, Sulphur Dioxide (SO2) - Sulphur dioxide is an inorga, This chemistry video tutorial explains how to draw the lewis, This problem has been solved! You'll get a detailed, The actual structure of SO2 is an average, or a resonance hyb, SO2 = 18 Valence Electrons. SO2 Lewis Structure Setup Step-3: Now, Step 1. The main objective is to draw the correct resonance, Which of the following molecules would have resonance s, Resonating structures of Ozone. Ozone (O 3) is an , When a molecule has nonequivalent resonance structures,, Learn the rules and examples of resonance structures for SO2 -LRB- Sul, There are two resonance structures HNO3 (Nitric Aci.