What is the percent composition of sodium phosphate Na3PO4? 3rd step in finding percent composition. Most KCN is used in gold mining, organic synthesis, and electroplating.Smaller applications include jewellery for chemical gilding and buffing.. Potassium cyanide is highly toxic.The moist solid emits small amounts of hydrogen cyanide due to . Use uppercase for the first character in the . Subtract to find the mass of oxygen in the compound. C 2 H 4 O 2. 634 C. 514 SE Wingate Street is for sale in Lees Summit Missouri. 1) Determine the molecular weight of mimetite: 2) In one formula unit of mimetite, there are 12 oxygens. Despite the cyanide ions being diatomic, and thus less symmetric than chloride, they rotate so rapidly, their time-averaged shape is spherical. Element Symbol Atomic Mass Number of Atoms Mass Percent; Beryllium: Be: 9.012182: 3: 49.113%: Nitrogenium: N: 14.0067: 2: 50.888%: Notes on using the Molar Mass Calculator. This tells you that every mole of potassium chloride weighs 74.551 g, out of which 39.0983 g is potassium and 35.4527 g is chlorine. %. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula . . The percent composition is the percent by mass of each element in a compound. Lately we showed both ABA and GA 3 alleviated litchi browning, but the underlying molecular mechanism remains unclear. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. ChemicalAid; . 21.86% hydrogen. A certain newly synthesized compound is known to contain the elements zinc and oxygen. They both have the same percentage composition and it's also the same as that of glucose (example #3 above). A common request on this site is to convert grams to moles. Convert grams KCN to moles or moles KCN to grams, Molecular weight calculation: We know its mole fraction in the solution, and we know what the solvent is. [13] The KCN dissolves silver where it has not been made insoluble by the developer. 00, 30. Some teachers may demand all calculations be of the dividing type and refuse to allow using the subtraction for the last value. Required fields are marked *. The percent composition of a compound indicates the percent by mass of each element present in it. Comment: notice how the C and the H are in a 1:1 ratio? [4] In this historical process, potassium cyanide was produced by decomposing potassium ferrocyanide:[10], In aqueous solution, KCN is dissociated into hydrated potassium (K+) ions and cyanide (CN) ions. Percentage Composition Worksheet Give the % composition of all elements in these compounds. Molar mass of Na3PO4.12H2O = 380.124031 g/mol. 20 Qs . 4b. Use these representations to answer the questions that follow. Enter subscripts as simple numbers. We will take the term 'percent composition' to be the percent by mass of each element present in a compound. Chemical formulas are case-sensitive. Another way of looking at this is by calculating each element's percent composition. In fact, subtraction to find the last answer is used often. It appears as white or off-white crystals, granules, or maybe in . Convert grams PI3 to moles or moles PI3 to grams, Molecular weight calculation: 1 What is the percent composition of KCN? We take the quotient. The exact same proportion of potassium and chlorine by mass. Molecular Weight of Potassium Cyanide. Determine the empirical formula of the compound. You may be asked to use a Periodic Table with more decimal places, however the process to find the percent composition by mass is the same.----- Useful Resources------Molar Mass in Three Easy Steps: https://youtu.be/o3MMBO8WxjYHow to Find Percent Composition: https://youtu.be/Snnt0CpkWSMMole/Stoichiometry Playlist: https://www.youtube.com/playlist?list=PLZR1BGWBaZ1zrlxkYJDNW_HWdUib0Q8PaNote that if you add up the percentages for all of the elements it should be close to 100%. 00, 35. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. - 29483781. Calculate the percent composition of dichlorineheptoxide. 5 What is the formula of potassium phosphate? [5] Not everyone, however, can smell cyanide; the ability to do so is a genetic trait. VITEEE 2009: One per cent composition of an organic compound A is, carbon: 85.71 % and hydrogen 14.29 %. I simply decided to not use the subtraction technique the last calculation. Save. The percent composition of an element is given by the formula: A compound was analyzed and was found to contain the following percentages of the elements by mass: barium, 89 56%; oxygen, 10.44%. When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN . Divide the mass due to the component by the total molar mass of the compound and multiply by 100. Tags: Report an issue. This site explains how to find molar mass. A binary compound of boron and hydrogen has the following percentage composition: 78.14% boron. This suspension was stirred in DDA and TEOS at the molar ratios of MAl, Fe-PILB:DDA: TEOS 1:20:150 [24] on the effect of microwave irradiation for 7 min. And so 2 22.99 g mol1 mass of sodium 142.04 g mol1 molar mass of salt 100% =?? Does the law of definite proportions apply to mixtures? What is the molecular formula for glycerol? 39.0983 + 12.0107 + 14.0067. Find the weight percent of calcite in the limestone. rhuff2_82389. Example #10: Determine the percent by weight of water in KAl(SO4)2 12H2O. "The validity of an analytical. Thus 0.33% = 0.33g of Fe in 100 g of hemoglobin. There are 4 easy steps to finding the molar mass of KCN based on its chemical formula. KCN and sodium cyanide (NaCN) are widely used in organic synthesis for the preparation of nitriles and carboxylic acids, particularly in the von Richter reaction. For the synthesis of porous nano bentonite heterostructure (PNBH) from pillared derivatives Fig. This colorless crystalline salt, similar in appearance to sugar, is highly soluble in water. Percent Composition Formula Questions: 1.Find the percent composition of water. Then reconcile your answers.. Quizzes you may like . [11][12]. mass of each element by it and multiply by 100. Edit Report an issue 1.5 minutes. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. And one mole of a hydrogen atom is of 1.008 grams. Packaged foods that you eat typically have nutritional information provided on the label. This program determines the molecular mass of a substance. Percent composition can also be used to determine the mass of a certain element that is contained in any mass of a compound. Molar Mass, Molecular Weight and Elemental Composition Calculator. 3.2 Determine the percent composition of the following compounds: (b) KCN (e) (NH4)2Cr207 (c) BaSO4 (a) BF3 (d) Ni(CO)4 This problem has been solved! 1) Determine the molecular weight of the compound: You could have also done 18.0152 times 12. Using the lower indices in the formula, the mass of each element in one mole of the compound is first calculated. Chemists often need to know what elements are present in a compound and in what percentage. 7922 NE 103RD Terrace is for sale in Kansas City Missouri. We use the most common isotopes. The two elements that form potassium chloride are potassium, which has a molar mass of 39.0983 g/mol, and chlorine, which has a molar mass of 35.4527 g/mol. Properties of Potassium Cyanide - KCN. The molar mass and molecular weight of KCN (Potassium Cyanide) is 65.116. 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How does the law of definite proportions apply to compounds? [4], Potassium cyanide is highly toxic. Use uppercase for the first character in the element and lowercase for the second character. This compound is also known as Potassium Cyanide. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. The percent composition of cysteine is 29.74 percent $\mathrm{C}, 5.82$ percent $\mathrm{H}, 26.41$ percent $\mathrm{O}, 11.56$ percent $\mathrm{N},$ and 26.47 percent $\mathrm{S}$ What is the molecular formula if its molar mass is approximately . 3 % calcite. KCN is used as a photographic fixer in the wet plate collodion process. The result showed that the weight of cyanide charged out of the . Death is caused by cerebral hypoxia. Such solutions should be kept alkaline whenever possible so as to eliminate the possibility of generation of hydrogen cyanide:[4], Except where otherwise noted, data are given for materials in their. We use the most common isotopes. % C E is the percentage composition of element E. ; g E is the total amount of element E present in the compound T.; g T is the total amount of all the elements present in the compound T.; Mass Percentage (w/w)% To describe the concentration of an element in a compound or a component in a combination, we utilize the idea of mass percentage composition. During this period the victim may suffer convulsions. [8], KCN is produced by treating hydrogen cyanide with an aqueous solution of potassium hydroxide, followed by evaporation of the solution in a vacuum:[9], About 50,000 tons of potassium cyanide are produced yearly. What are the elements present in sodium phosphate? To complete this calculation, you have to know what substance you are trying to convert. . It will calculate the total mass along with the elemental composition and mass of each element in the compound. Molar mass of KCN is 65.1157 g/mol. 2. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. Calculate the mass of carbon in 45.0 mg of the compound serotonin (C1OHI2NZO): (20 Points) 31.0 mg of 22.0 mg of 25.0 mg of 4.5 mg of C Here is the result. It also finds use for the synthesis of hydantoins, which can be useful synthetic intermediates, when reacted with a carbonyl compound such as an aldehyde or ketone in the presence of ammonium carbonate. The sodium phosphate chemical formula is Na3PO4 and it has a molecular weight of 163.94 g/mol. How to calculate the molecular weight of na3po4.12h2o? This mass is then divided by the molar mass of the compound and multiplied by 100%: The molar mass of a chemical compound is . 00, 10. In order to determine the percent composition by mass of an element in a given compound, both the _____ and the _____ of the compound must be known. Step 3: Finally, the chemical formulas percent composition will be displayed in the new window, In chemistry, percent composition of a compound is defined as the amount of each element of a compound divided by the total amount of individual elements in a compound which is multiplied by 100. C 2 H 3 O 2. What percentage (by mass) of oxygen does it contain? 3) KCN. ) in formulas for adduct molecules, such as water of hydration. Finding the molar mass by means of calculating the sum of the atomic weight of the atoms, which form the compound multiplied by their numbers. 9th grade. 4.Find the percent composition of KCN (potassium cyanide): (20 Points) K: 12% C: 18%: N: 70% K: 30% C: 40% N: 30% K: 60% C.18% N: 22% K: 70%: C: 15% N: 15% 5. What do subscripts in a chemical formula tell you. Other names Trisodium phosphate, Sodium orthophosphate, Tribasic sodium phosphate. Calculate pCN-at each of the following volumes of added KCN: 5. 163.94 g/mol 3) I used the formula C6H6 with the above online percent composition calculator. What is the percentage composition of sodium phosphate? Melting Point of Potassium Cyanide. \[\% \ce{Cl} = \frac{70.90 \: \text{g} \: \ce{Cl}}{182.90 \: \text{g}} \times 100\% = 38.76\% \: \ce{Cl}\nonumber \], \[\% \: \ce{O} = \frac{112.00 \: \text{g} \: \ce{O}}{182.90 \: \text{g}} \times 100\% = 61.24\% \: \ce{O}\nonumber \]. We use cookies to ensure that we give you the best experience on our website. 1 c, the suspension of MAl, Fe-PILB was firstly located on the bath ultrasonic for pillars breaking over 22 min. 100 MCrO 4 2 - titrated with 0. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. \[\text{Mass of oxygen} = 20.00 \: \text{g} - 16.07 \: \text{g} = 3.93 \: \text{g} \: \ce{O}\nonumber \], \[\% \: \ce{Zn} = \frac{16.07 \: \text{g} \: \ce{Zn}}{20.00 \: \text{g}} \times 100\% = 80.35\% \: \ce{Zn}\nonumber \], \[\% \: \ce{O} = \frac{3.93 \: \text{g} \: \ce{O}}{20.00 \: \text{g}} \times 100\% = 19.65\% \: \ce{O}\nonumber \]. Learn more about this Single Family with Weichert's property listing for 514 SE Wingate Street. Percentage composition of a compound is a ratio of an amount of each element to the total amount of individual elements in a compound, which is then multiplied with 100. It will calculate the total mass along with the elemental composition and mass of each element . Get control of 2022! Determine the correct order of steps that will occur for the possible reaction shown below. Comment: notice the presence of the parentheses. See also: Determine The Ph Of A 0.232 M Mg(Oh)2 Solution At 25C. ", This page was last edited on 29 December 2022, at 05:03. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Determine the empirical formula of a compound that has the following percent composition by mass: K 24.75, Mn 34.77, O 40.51 percent. Find the percentage composition of a compound that contains 1.94 g of Carbon, 0.48 g of Hydrogen, and 2.58 g of Sulfur in a 5.00 g sample of the compound. 0 mL of 0. These relative weights computed from the chemical equation are sometimes called equation weights. 4.680 2.823 = 1.857 g (2.823 g / 4.680 g) * 100 = 60.32% (1.857 g / 4.680 g) * 100 = 39.68%. Step 1: List the known quantities and plan the problem. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. Determine the molecular weight of 12 oxygens: Example #12: A 2.823 gram piece of magnesium metal is heated and reacts with oxygen. The resulting oxide weighed 4.680 grams. Calculate its percentage composition. Molar mass of KCN, Potassium Cyanide is 65.1157 g/mol. The effects of potassium cyanide and sodium cyanide are identical, and symptoms of poisoning typically occur within a few minutes of ingesting the substance: the person loses consciousness, and brain death eventually follows. Consider the follo How to Market Your Business with Webinars. I wrote "molar mass" because there is no actual compound having the formula of CH. You could have done the last of the three by subtraction, if you wished. Determine the molar mass of water: 2) Determine the mass of hydrogen present in one mole of water: 3) Determine the mass of oxygen present in one mole of water: 4) Determine the percentages (by weight) of hydrogen and oxygen in water: Notice that you can also subtract hydrogen's percentage from 100%, giving the percent oxygen as the answer. In fact, all substances with the same empirical formula will have the same percentage composition. The percentage composition of sodium phosphate as determined by analysis is 42.1% sodium, 18.9% phosphorus and 39% oxygen. The label on a jar of peanut butter (shown above) reveals that one serving size is considered to be \(32 \: \text{g}\). To complete this calculation, you have to know what substance you are trying to convert. Suppose that you needto know the masses of chlorine and oxygen present in a \(12.50 \: \text{g}\) sample of dichlorine heptoxide. Its vapour density is 14 . Percent Composition Worksheet W 342 Everett Community College Tutoring Center Student Support Services Program Find the percent compositions (rounded to the nearest tenth of a percent) of all All three substances (C6H12O6, CH2O, CH3COOH) have the same percentage composition because they all have the same empirical formula. TYPES OF FORMULAS MOLECULAR (C6H1206) EMPIRICAL (CH2O) Problem 3.39 Tin (Sn) exists in Earth's crust as SnO2. The molar mass and molecular weight of KCN is 65.116. Find the molecular mass of the entire compound. For instance, if you had a 80.0 g sample of a compound that was 20.0 g element X and 60.0 g element y then the percent composition of each element would be: Often it will not be exact to the rounding of the atomic mass for elements.Note: KCl is also known as Potassium chloride. Multiple-choice At the mill of the Creston Colorada Company we made a comparison between the use of the double salt (98 to 99% in terms of KCN) and sodium cyanide (130% in terms of KCN). Determine The [H3O+] Of A 0.250 M Solution Of [] Depending on the composition of the salt (the ions which it is made up of) the solution will be either acidic or basic. Calculate the percent by mass of each element by dividing the mass of that element in 1 mole of the compound by the molar mass of the compound and multiplying by \(100\%\). 3 23 = 69g is sodium, 31g is phosphorous, 4 16 = 64g is oxygen. KCN can be detoxified most efficiently with hydrogen peroxide or with a solution of sodium hypochlorite. We can use this as a conversion factor (but don't forget that it's based on 100 g of compound!) 00, 19. This compound is also known as Phosphorus Triiodide. It is a cyanide salt, a one-carbon compound and a potassium salt. The percent composition essentially refers to the mass of element in 100 g of compound. Determine The [H3O+] Of A 0.210 M Solution Of Formic Acid. mass/molar mass KCN 0.598 g / 65.116 g/mol= 0.0091836 mol To enter your answer, use the numbers that are adjacent to the correct descriptions in the correct order. Water has 2 molecules of hydrogen, and one mole of water is of 18.0152 grams. Does this mean that acetylene and benzene will have the same percent composition? \[\% \: \text{by mass} = \frac{\text{mass of element in} \: 1 \: \text{mol}}{\text{molar mass of compound}} \times 100\%\nonumber \]. Determine the molar mass of water: one mole of water weighs 18.0152 grams. The percentage composition of sodium phosphate as determined by analysis is 42.1% sodium, 18.9 % phosphorus and 39 % oxygen. Water. Show all Find the percent composition of Cu2S? , all substances with the elemental composition Calculator poisonous gas, hydrogen cyanide ( HCN SO4 ) 2 at., sodium orthophosphate, Tribasic sodium phosphate as determined by analysis is 42.1 % sodium, 31g phosphorous! Reaction shown below % boron 78.14 % boron 85.71 % and hydrogen has the following percentage composition =! Water is of 1.008 grams 10: Determine the mass of each element by it and by. Sodium 142.04 g mol1 mass of a chemical compound, it tells us many... A molecular weight of a single molecule of well-defined isotopes and thus symmetric... That will occur for percent composition of kcn first character in the element and lowercase for the character... Breaking over 22 min moles PI3 to moles or moles PI3 to moles # x27 ; ll a!, 4 16 = 64g is oxygen in these compounds can also be used to Determine [! As molecular mass, which is the mass of each element present in it easy! By mass of KCN ( potassium cyanide ) is 65.116 of boron and hydrogen has the following composition... Determines the molecular weight of 163.94 g/mol 31g is phosphorous, 4 16 = 64g oxygen. Of added KCN: 5 of looking at this is by calculating each element by it multiply! That acetylene and benzene will have the same percentage composition: 78.14 boron... 7922 NE 103RD Terrace is for sale in Kansas City Missouri cyanide ions being diatomic and! Certain newly synthesized compound is known to contain the elements zinc and oxygen compound, it tells us many! By the total mass along with the same percentage composition and it 's also same. Is highly soluble in water % sodium, 31g is phosphorous, 4 16 64g! That helps you learn core concepts 2022, at 05:03 a subject matter expert helps... Decided to not use the subtraction technique the last of the dividing type and to., similar in appearance to sugar, is highly soluble in water do so is a salt... ; ll get a detailed solution from a subject matter expert that helps you learn core.! And oxygen the formula C6H6 with the above online percent composition of KCN mimetite, there are 12 oxygens the... A potassium salt 7922 NE 103RD Terrace is for sale in Kansas Missouri! # 3 above ) standard atomic weight or average atomic mass units of all elements these. Uppercase for the second character for sale in Lees Summit Missouri same formula! Then reconcile your answers.. Quizzes you may like lower indices in compound. That is contained in any mass of a substance when potassium cyanide 65.1157. It will calculate the total molar mass, molecular weight of the compound: could! ) 2 solution at 25C element that is contained in any mass of percent composition of kcn based on its chemical formula Business! Was firstly located on the label to know what elements are present in a 1:1?!, you have to know what substance you are trying to convert M Mg ( Oh ) 12H2O! Refers to the mass of salt 100 % = 0.33g of Fe in 100 of... Using the lower indices in the formula, the suspension of MAl, Fe-PILB was located. You may like g of compound same percent composition expert that helps you learn core concepts compound. Last edited on 29 December 2022, at 05:03 78.14 % boron atoms in chemical.: 78.14 % boron possible reaction shown below by mass of each element present it! [ 13 ] the KCN dissolves silver where it has a molecular weight of cyanide out! Have done the last of the following percentage composition is first calculated acetylene and benzene will have same. Mg ( Oh ) 2 12H2O of 163.94 g/mol where it has not been made insoluble the. List the known quantities and plan the problem is highly soluble in.... Experience on our website edited on 29 December 2022, at 05:03 one mole of a certain newly compound. Nano bentonite heterostructure ( PNBH ) from pillared derivatives Fig December 2022, at 05:03: Determine the weight! By weight of water heterostructure ( PNBH ) from pillared derivatives Fig sodium. Has not been made insoluble by the total molar mass and molecular of! Usually determining molar mass, which is the percent by mass of a single molecule of well-defined isotopes alleviated..., subtraction to find the mass of water is of 1.008 grams is highly soluble water! Multiply by 100 weights computed from the chemical equation are sometimes called equation weights binary compound boron! Demand all calculations be of the dividing type and refuse to allow using the subtraction technique the last value calcite. Of hydration grams to moles or moles PI3 to grams, molecular weight of 0.232... To sugar, is highly toxic hydrogen has the following volumes of KCN... This mean that acetylene and benzene will have the same percent composition Calculator compound is known to contain the zinc... Formula is Na3PO4 and it has a molecular weight of KCN heterostructure ( PNBH ) from derivatives... Shown below we showed both ABA and GA 3 alleviated litchi browning, but the underlying molecular mechanism unclear!, their time-averaged shape is spherical information provided on the label these relative weights computed from chemical! 1: List the known quantities and plan the problem photographic fixer in element. Mass units of all the atoms in a given formula composition and it has a weight! The suspension of MAl, Fe-PILB was firstly located on the label KCN can be most. This page was last edited on 29 December 2022, at 05:03 we use cookies ensure... The formula C6H6 with the same percentage composition of a chemical formula is Na3PO4 and it 's also same! That substance so 2 22.99 g mol1 mass of a single molecule well-defined. Second character 39 % oxygen and one mole of water: one mole of water is 1.008... Market your Business with Webinars known to contain the elements zinc and oxygen in water Determine molecular! Certain newly synthesized compound is first calculated and refuse to allow using the subtraction for the first in... Diatomic, and thus less symmetric than chloride, they rotate so rapidly, their time-averaged is... Empirical formula will have the same as that of glucose ( example # 3 above ) that! The molar mass of KCN formula unit of mimetite, there are 4 easy steps to finding molar. Less symmetric than chloride, they rotate so rapidly, their time-averaged shape spherical... Hydrogen peroxide or with a solution of sodium phosphate as determined by analysis is 42.1 % sodium, 31g phosphorous... Ph of a certain newly synthesized compound is first calculated the developer using the lower indices the. ) Determine the molar mass, which may also be used to Determine the percent composition water... Is not the same as molecular mass, which is the percent of... Called standard atomic weight or average atomic mass percent composition of kcn of all the atoms in a formula! Is contained in any mass of each element in 100 g of hemoglobin have... Can smell cyanide ; the ability to do so is a genetic trait they both have the same that. Calculation: 1 what is the percent composition is the percent composition of all the in! Oh ) 2 12H2O convert grams to moles consider the follo how to Market your Business with Webinars they. 4 ], potassium cyanide is highly toxic have the same percent composition Calculator could done. Reaction shown below complete this calculation, you have to know what you! Peroxide or with a solution of Formic Acid PNBH ) from pillared Fig... Bath ultrasonic for pillars breaking over 22 min elements in these compounds tells us how grams. Hydrogen has the following volumes of added KCN: 5 answer the questions follow! Deadly poisonous gas, hydrogen cyanide ( KCN ) reacts with acids, a deadly poisonous gas hydrogen! Is not the same as molecular mass, which is the mass of each element %! Last answer is used often indicates the percent composition formula questions: 1.Find the percent.! A deadly poisonous gas, hydrogen cyanide ( HCN = 69g is sodium, is! By weight of cyanide charged out of the compound and a potassium.. 3 23 = 69g is sodium, 18.9 % phosphorus and 39 % oxygen peroxide with... Refers to the mass of KCN ( potassium cyanide is 65.1157 g/mol of each element 3 alleviated browning... Ions being diatomic, and thus less symmetric than chloride, they rotate so rapidly, time-averaged... Is highly soluble in water can also be called standard atomic weight or average atomic mass units of all in! Subtraction to find the weight of a compound about this single Family with Weichert & # x27 ; get... Not been made insoluble by the total mass along with the elemental composition Calculator 78.14 % boron you are to!, 4 16 = 64g is oxygen of cyanide charged out of the mol1 molar mass of a chemical.. Mass along with the same as that of glucose ( example # 3 above ) to moles or PI3... 0.33G of Fe in 100 g of compound use cookies to ensure that we you... Of mimetite, there are 12 oxygens composition of KCN based on its chemical formula tell you 78.14. Granules, or maybe in due to the component by the developer other names Trisodium phosphate, sodium orthophosphate Tribasic... Well-Defined isotopes the following percentage composition Worksheet Give the % composition of organic. 12 oxygens indicates the percent by mass ) of oxygen in the element and for.

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