Expert Answer Aspirin = C9H8O4 We determine the molar mass of acetylsalicylic acid: 1 mol C9H8O4 = 12*9 + 1*8 + 16*4 = 180 g i) We convert the 325 mg of aspirin into grams: 1 g/1000 mg * 325 mg = 0.325 g We use the molar mass to determine the number of aspirin m View the full answer The molecular mass of aspirin is ( 9 12) + ( 8 1) + ( 16 4) = 180 g Number of moles = Given weight Molecular weight Number of moles = 360 10 - 3 180 Number of moles = 2 10 - 3 moles Step 2: Calculating the atoms The total moles of oxygen present in C 9 H 8 O 4 is 4 2 10 - 3 moles a series of elements that have similar properties and that are arranged in descending order of chemical activity; examples of activity series include metals and halogens. Most questions answered within 4 hours. A link to the app was sent to your phone. First, we will determine the number of moles of aspirin present. Use Avogadro's Number to Convert Molecules to Grams. ThoughtCo, Apr. the mass in grams of a mole of molecular units; a value numerically equivalent to the average molecular mass expressed in grams molar mass the mass of one mole of a pure substance molar volume the volume occupied by 1 mole of a gas at standard temperature and pressure (STP); 22.4 L mole A molecule is the representative particle of diatomic elements and molecular compounds. The molar mass of C9H8O4 is 108+8+64 = 180 g/mol. Generally, it has no smell but when in moist air it acquires a smell of acetic acid. A common request on this site is to convert grams to moles. To calculate the molar mass of a substance, we need to know the atomic masses of the elements that make up the compound, which can be found on the periodic table. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. CO, Co, co have three separate meanings. (c) What is the mass, in grams, of 2.26 1023 molecules of aspirin, C9H8O4? 1 grams C9H8O4 is equal to 0.0055507011590197 . Add it all up. becomes \alpha helical as the pH is raised above 10. * Molar mass of C atoms (grams) is numerically equal to . UnitPot is a noteworthy web-based scientific unit converter that comes with an intuitive user interface. Molar Mass. Get a free answer to a quick problem. Multiply the number of atoms of each different element with the atomic mass for every element. To obtain the mass of 1 mole of water, look up the atomic masses for hydrogen and oxygen from the Periodic Table. (c) What is the mass, in grams, of 2.26 1023 molecules of I did it quickly, so check the number, but I get 180.2 grams/mole. An empirical formula is the simplest whole number ratio of atoms of the elements in a compound. 1)The chemical formula for aspirin is C9H8O4. Example 1: (5/105) x 100 = 0.04761 x 100 = 4.761%. Acetylsalicylic acid commonly known as Aspirin is a prototypical analgesic with the chemical formula C 9 H 8 O 4. Examples of molar mass computations: Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa. Laboratory analysis of aspirin determined the following mass percent composition as follows: C = 60.00%, H = 4.48% and O = 35.53%. Find the caps key. Now we need the molar mass of C9H8O4. 1: empirical formula. [1], The molar mass of Hydrogen is 1.008 g/mol. list three common ways that matter is measured, Which contains more molecules:1.00mol H2O2, 1.00 mol C2H6, or 1.00 mol CO, Which containsmore molecules: 1.00mol H2O2, 1.00 mol C2H6, or 1.00 mol CO, Find the number of representative particles in each substance: 3.00 mol Sn, Find the number of representative particles in each substance: 0.400 mol KCL, Find the number of representative particles in each substance: 7.50 mol SO2, Find the number of representative particles in each substance: 4.80 * 10^-3 mol NaI, Calculate the molar mass of each substance: H3PO4, Calculate the molar mass of each substance: N2O3, Calculate the molar mass of each substance: CaCO3, Calculate the molar mass of each substance: (NH4)2SO4, Calculate the molar mass of each substance: C4H9O2, Calculate the molar mass of each substance: Br2, Calculate the mass of 1.00 mol of each substance: silicon dioxide (SiO2), Calculate the mass of 1.00 mol of each substance: diatomic nitrogen (N2), Calculate the mass of 1.00 mol of each substance: iron(III) hydroxide (Fe(OH)3), Calculate the mass of 1.00 mol of each substance: copper (Cu), List the steps you would take to calculate the molar mass of any compound, to find the molar mass take out a periodic table and look up the atomic mass[number below each element in the table that i gave the link to] of S [sulfer] which you will find is 32 [round to the nearest whole number] then find the atomic mass of O [oxygen] which you will find is 16. 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. Aspirin (C9H8O4, molecular mass 180.2 g/mol) is synthesized by the reaction of salicylic acid (C7H6O3, molecular mass 138.1 g/mol) with acetic anhydride (C4H6O3, molecular mass 102.1 g/mol) according to the reaction 2 C7H6O3 (s) + C4H6O3(l) 2C9H8O4(s)+ H2O(l) 2.0g of salicylic acid and 5.4 g of acetic anhydride are mixed and the reaction is a volume occupied by a mole of any gas at STP (22.4 L) molar volume the number of grams of an element that is numerically equal to the atomic mass in amu Atomic mass the percent by mass of each element in a compound percent composition the mass of a mole of a molecular compound molar mass The number moles of aspirin is . Learn more about our help with Assignments: Chemistry You now repeat the drop, but you have a friend down on the street who throws another ball upward at speed vvv. If you're getting the incorrect answer for this type of problem, the usual cause is having the number of atoms wrong. A few things to consider when finding the molar mass for C9H8O4: Almost. Do this by looking up the atomic mass of each element in the molecule from the periodic table and adding up the masses of all of the atoms. For members entering service on or after April 2, 2012, please . Helmenstine, Anne Marie, Ph.D. (2023, April 5). Complete answer: The molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the amount of substance in that sample. 2.72 x 1024; 4.82 x 1024; 2.41 x 1024 C. 6.02 x 1023 of each D. 1; 1; 1 B. The SI base unit for amount of substance is the mole. Well, now you have come to know the molar mass of Aspirin. One mole is 6.02x1023 particles of anything. Chemical equation with the same number of atoms of each element on both sides of the equation, (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected, A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products. Because the molar mass of any molecule or compound can be calculated by simply adding the molar masses of individual atoms. The number of constituent particles or atoms present in one mole of a substance is known as Avogadro number. answered by DrBob222 So, Molar mass of Aspirin (C9H8O4) = Molar mass of 9 Carbon (C) atoms + Molar mass of 8 Hydrogen (H) atoms + Molar mass of 4 Oxygen (O) atoms.= (12.011) 9 + (1.008) 8 + (15.999) 4= 108.099 + 8.064 + 63.996= 180.159 g/mol. The formula of aspirin is C9H8O4. Examples of molar mass computations: Molar mass calculator also displays common compound name, Hill formula, elemental composition, mass percent composition, atomic percent compositions and allows to convert from weight to number of moles and vice versa. The precipitate formed in a double-replacement reaction can be identified using table of solubility. In science, it typically describes the number of molecules or atoms. A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. ANSWER: 45 g 2)The gram molecular mass of oxygen is. Mass of urea (solute)(NHCONH) = W = 5gram, Vapour pressure of solution = p =? We use the most common isotopes. 6.022 x 10^23. In accordance with the law of conservation of mass, a chemical equation must be balanced. She has taught science courses at the high school, college, and graduate levels. How many grams C9H8O4 in 1 mol? Observation # Before Reaction During/After Reaction 1 mass = 30 grams mass = 42 grams 2 atoms of H = 5 atoms of H = 5 3 no gas gas present 4 two types of molecules. a chemical change in which two or more substances react to form a single new substance, A chemical reaction that occurs when a substance reacts with oxygen, releasing energy in the form of heat and light, an equation that shows dissolved ionic compounds as dissociated free ions, (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance, a chemical change that involves an exchange of positive ions between two compounds, an equation for a reaction in solution showing only those particles that are directly involved in the chemical change, a chemical change in which one element replaces a second element in a compound, a chemical equation that does not indicate the relative amounts of the reactants and products, Ions that do not take part in a chemical reaction and are found in solution both before and after the reaction, A chemical reaction can be concisely represented by a chemical equation. Calculate the . phosphate? Browse the list of So, the mass of 1.701021 molecules of aspirin would be: (1.7010^21 molecules) * (1 mol /6.02* 10^23 molecule) * 180g/mol= 0.508 gram Advertisement AkshayG is the mass of of aspirin. the pH dependence of the helixcoil transition of poly-Lglutamate. But how can you get this value? Thus, the molar mass of aspirin is 180.1568 grams per mole. ANSWER: 16.0 g 3)What is the mass, in grams, C7H603+C4H6O3=C9H8O4=HC2H3O2 a)Assuming the maximum yield that could be obtained is 76.8% what mass of Aspirin C9H8O4 could be obtained from this reaction when 2.00 * 10^2 grams of C7H6O3 reacts with, 2)The gram molecular mass of oxygen is 16.0 g right? Mass Percent: 4.476%, Element: Carbon Now, to calculate the molar mass of Aspirin, you just have to add the molar mass of all the individual atoms that are present in Aspirin. 3)How would I find the mass, in grams, of 3.01 x 10^23 molecules of water? How can you determine the molar mass of a gaseous compound if you do not know its molecular formula? So for that, have a look at the periodic table given below. One mole of any gas at STP (1 atm pressure and 0(degrees C) occupies a volume of 22.4 L. The density of any gas at STP is its molar mass divided by 22.4 L. The percent composition is the percent by mass of each element in a compound. answered 03/07/21, Patient PhD Chemist with 40 Years of R&D And Teaching. You do the numbers. [3]. Likewise, the molecular mass of an aspirin molecule, C 9H 8O 4, is the sum of the atomic masses of nine carbon atoms, eight hydrogen atoms, and four oxygen atoms, which amounts to 180. . Add the atomic, C7H6O3+C4H6)3->C9H8O4+C2H4O2 What is the theoretical yield in grams of aspirin, C9H8O4, when 2.00 grams of salicylic. The atomic weights of these elements are as follows: carbon (12.0107 g/mol), hydrogen (1.00794 g/mol), and oxygen (15.999 g/mol). A. Symbol: O We have been given thatmolecules of Aspirin. This reaction generally takes place between two ionic compounds in aqueous solution. Science. The designations for a solid, liquid, or gas are (s), (l), and (g) respectively. (v) What is the mass of one molecule of aspirin in g? Finding molar mass starts with units of grams per mole (g/mol). For example, a single molecule of O 2 has a mass of 32.00 u, and 1 mol of O 2 molecules has a mass of 32.00 g. As with atomic mass unit-based masses, to obtain the mass of 1 mol of a . Molar mass is the mass equivalent of Avogadro's number of atoms of an element, or Avogadro's number of molecules of in a chemical compound. . answered by drwls June 1, 2010 Answer this Question Still need help? You can apply Avogadro's number to determine the mass of molecules. Mass Percent: 35.523%. 12.0107*9 + 1.00794*8 + 15.9994*4, Element: Hydrogen Question: Calculate the mass in grams of 2.5 x 10 9 H 2 O molecules. The units of mass are typically grams. # of Atoms: 9 The determination of the percentage composition from a molecular formula aspirin is a compound with the molecular formula C9H8O4. It is also known as aspirin or 2-Acetoxybenzoic acid. If you have a periodic table with you, then you can easily calculate the molar mass of Aspirin (or Acetylsalicylic acid or C9H8O4). You do the numbers. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. This information is useful in various applications, such as chemical reactions and drug dosage calculations. We use the most common isotopes. In conclusion, the molar mass of aspirin is 180.1568 grams per mole, which is determined by adding up the atomic weights of all the atoms present in the compound. 1. Enter your answer in scientific notation. aspirin, C9H8O4? You can connect with him on facebook and twitter. One mole of any substance contains the same number of representative particles as one mole of any other substance. (a) NMR measurements have You can see that in Aspirin C9H8O4 , there are 9 Carbon atoms, 8 Hydrogen atoms and 4 Oxygen atoms. The chemical formula for aspirin is C9H8O4, which indicates that it is composed of 9 carbon atoms, 8 hydrogen atoms, and 4 oxygen atoms. Now here we have to find the molar mass of Aspirin (C9H8O4). # of Atoms: 9 We assume you are converting between grams C9H8O4 and mole. He is a founder of Knords Learning and is passionate about helping students through his easily digestible explanations. Ask a New Question What is the mass, in grams, of 4.56 1023 molecules of aspirin, C9H8O4? What is the mass, in grams, of 1.701021 molecules of aspirin, C9H8O4? weighs 5.10 g? 1.09 x 1021 The molecular mass (m) is the mass of a given molecule: it is measured in daltons or atomic mass (Da or u). phosphate? The mass of molecules of aspirin is grams. Using the formula . Aspirin is made up of molecules, each of which has a molecular weight. For example, the molar mass of salicylic acid is 138.12 g/mol, the molar mass of acetic anhydride is 102.09 g/mol, and the molar mass of acetylsalicylic acid is 180.16 g/mol. Is this location at the halfway point between window and ground, above this point, or below this point? For example, in this problem, there were two atoms of hydrogen and one atom of oxygen. At some location, the balls pass each other. The chemical formula for aspirin is C9H8O4, which indicates that it is composed of 9 carbon atoms, 8 hydrogen atoms, and 4 oxygen atoms. It is equal to 6.023 1023 mol-. Calculate the Empirical formula for the following. [2], The molar mass of Oxygen is 15.999 g/mol. Avogadro's number is 6.02 x 10 23 atoms per . What is the mass, in grams, of 4.86 1023 molecules of aspirin, C9H8O4? Advertisement Advertisement Calculate the cost of heating the pool from 15.5C15.5^{\circ} \mathrm{C}15.5C to 26.5C26.5^{\circ} \mathrm{C}26.5C if electrical energy costs $0.100 per kilowatt-hour. The molar mass of Carbon is 12.011 g/mol. It may be in the form of a word, a symbol, or a figure that reflects the arithmetic value of a quantity. Submit order and get a quick answer at the best price for any assignment or question with DETAILED EXPLANATIONS! Since the molecular weight of Aspirin - C9H8O4 is equal to: = 180.157 g/mol =6.022 x 10^23 atoms or molecules, it therefore follows that 1.70 x 10^21 molecules = 1.70 x 10^21 /6.022 x 10^23 x 180.157 = 0.50858 grams. , 459684 187 4.7K views 11 months ago Explanation of how to find the molar mass of C9H8O4: Aspirin (Acetylsalicylic acid). moles Aspirin to grams. Finally, add all the numbers together. I hope you have understood the short and simple calculation for finding the molar mass of Aspirin. Molar mass is defined as the mass in grams of one mole of a substance. From the periodic table : Molar Mass of C = 12 grams Molar Mass of H = 1 grams Molar Mass of O = 16 grams MM aspirin = (9 x 12 grams) + (8 x 1 grams) + (4 x 16 grams) MM aspirin = 108 grams + 8 grams + 64 grams MM aspirin = 180 grams MM sal = (7 x 12 grams) + (6 x 1 grams) + (3 x 16 grams) But we can also say that the "molar mass" of carbon is 12.01 g/mole. This problem has been solved! Weights of atoms and isotopes are from Related:. We are told we have 5.56x1023 molecules of aspirin, C9H8O4. Therefore the mass of aspirin is 0.389 g. Learn more: https://www.thoughtco.com/avogadros-number-chemistry-problem-example-609542 (accessed May 1, 2023). Following are the steps: Determine how many atoms of each different element are in the formula. Mass Percent: 4.476%, Element: Carbon Calculate the molar mass of mannitol. Chemistry questions and answers I. Acetylsalicylic acid (ASA), C9H8O4, is the active ingredient of aspirin. Solution. Add the atomic masses of each atom (9 carbonsx12, 8 hydrogens x 1, and 4 oxygens x 16) to find the number of grams it takes to make a mole of C 9 H 8 O 4. What is the mass of 0.40 mol of aspirin? But all these units (i.e g/mol, grams/mole and g/mole) are the same. The molar mass of aspirin is 180.114 g/mol. Further Explanation: The reason is that the molar mass of the substance affects the conversion. Don't make chemistry harder than it is. The SI unit that measures the amount of substance is the mole. No packages or subscriptions, pay only for the time you need. Molar mass of C9H8O4 = 180.15742 g/mol This compound is also known as Aspirin. It has a flashpoint of 482 F. A compound of nitrogen and oxygen that contains 30.43% N by weight. Making educational experiences better for everyone. 9; 8; 4 B. asked by Anita June 1, 2010 1 answer 4.56*10^23 molecules is about 3/4 of one mole. 5, 2023, thoughtco.com/avogadros-number-chemistry-problem-example-609542. Mass Percent: 60.001%, Element: Oxygen For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Substitute these values in equation (2). Expert's answer Download Answer Need a fast expert's response? Finding molar mass starts with units of grams per mole (g/mol). common chemical compounds. This site explains how to find molar mass. this pH-dependent conformational transition. 9 times the MW of C plus 8 times the MW of H plus 4 times the MW of O. It includes spectator ions as well as ions i, Both single- and double-replacement reactions can be written as net ionic equations in which spectator ions are deleted from both sides of the equation. Check out other related topics for more practice; Categories. I hope you have understood the short and simple calculation for finding the molar mass of Aspirin. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Convert between C9H8O4 weight and moles Elemental composition of C9H8O4 Sample reactions for C9H8O4 Formula in Hill system is C9H8O4 (d) What is the molar mass of a particular compound if 0.099 mol for a gas, the temperature of 0 degrees C and the pressure 1.00 atm. The average mass of an aspirin molecule is 180. Account for Jay is an educator and has helped more than 100,000 students in their studies by providing simple and easy explanations on different science-related topics. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. Now here we have to find the molar mass of Aspirin C9H8O4. Mass Percent: 35.523%. Symbol: C Avogadro's Number Example Chemistry Problem, Avogadro's Number Example Chemistry Problem - Water in a Snowflake, How to Calculate Mass Percent Composition, Experimental Determination of Avogadro's Number, How to Calculate Theoretical Yield of a Reaction, Calculate Empirical and Molecular Formulas, How to Find Molecular Mass (Molecular Weight), Formula Mass: Definition and Example Calculation, Ph.D., Biomedical Sciences, University of Tennessee at Knoxville, B.A., Physics and Mathematics, Hastings College. For example, the atomic mass of carbon, C, is 12.01 amu. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. Exercise 2.11. . Let me show you the calculation to get the molar mass of Aspirin (or Acetylsalicylic acid or C9H8O4). aspirin, C9H8O4? You can find out more about our use, change your default settings, and withdraw your consent at any time with effect for the future by visiting Cookies Settings, which can also be found in the footer of the site. what is the mass of one molecule of co. 2023.04.19 used 200 lb anvil for sale. If I'm right just multiply 1.32g by 6.022*10^23 and the answer is 7.949*10^23 molecules. 1.81 x 10-3 B. (d) What is the molar mass of a particular compound if 0.099 mol Number of molecules of aspirin = 6.510 molecules C'mon. To complete this calculation, you have to know what substance you are trying to convert. In the molecular formula of aspirin, C9H8O4, how many moles of carbon atoms, hydrogen atoms, and oxygen atoms are present? How many moles of ASA are in the sample? A complete ionic equation shows all disolved ionic compounds as their free ions. Choose an expert and meet online. Divide this value by Avogadro's number to get the mass in grams of the molecules. The representative particle of ionic compounds is a formula unit. The aspirin molecule consists of 8 Hydrogen atom s , 9 Carbon atom s and 4 Oxygen atom s - a total of 21 atom s. Formula in Hill system is C9H8O4 Computing molar mass molar weight To calculate molar mass of a chemical compound enter its formula and click 'Compute'. (c) What is the mass, in grams, of 2.26 1023 molecules of I did it quickly, so check the number, but I get 180.2 grams/mole. 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 molar mass of a substance is the mass in grams of one mole of that substance. Special symbols are written after formulas in equations to show a substance's state. (b) Predict These relative weights computed from the chemical equation are sometimes called equation weights. The mass of 1 mol of molecules (or formula units) in grams is numerically equivalent to the mass of one molecule (or formula unit) in atomic mass units. Don't make chemistry harder than it is. Step 1: Find the molar mass of aspirin and salicylic acid. Because the molar mass of any molecule (or compound) can be calculated by simply adding the molar masses of individual atoms. So lets look at the molar mass of Carbon, Hydrogen and Oxygen from the above periodic table. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. These relative weights computed from the chemical equation are sometimes called equation weights. find the mass in grams of a molecule of aspirin c9h8o4 asked by Anonymous April 10, 2013 2 answers 9 times the MW of C plus 8 times the MW of H plus 4 times the MW of O. CO, Co, co have three separate meanings. The atomic mass of C is 12.01 g. The atomic mass of H is 1.008 g. The atomic mass of O is 15.99 g. Substitute these values in equation (3). Computing molecular weight molecular mass To calculate molecular weight of a chemical compound enter it's formula, specify its isotope mass number after each element in square brackets. Base the number of significant digits on the number given in the problem for the number of molecules. 12.0107*9 + 1.00794*8 + 15.9994*4, Element: Hydrogen Symbol: O The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. 1)The chemical formula for aspirin is C9H8O4. Convert grams C9H8O4 to moles or moles C9H8O4 to grams Molecular weight calculation: 12.0107*9 + 1.00794*8 + 15.9994*4 Percent composition by element Element: Hydrogen Symbol: H Atomic Mass: 1.00794 # of Atoms: 8 Mass Percent: 4.476% Element: Carbon Symbol: C You can ask a new question or browse more chemistry questions. You can measure the mass of 22.4 L of the compound at STP; this is the molar volume of the gas. = 16.04 amu Molar mass of a compound is numerically equal to the molecular mass of its molecule So molar mass of CH4 is 16.04 g . It strikes the ground with speed vvv. For example, in the formula H2O, there are two atoms of hydrogen (the subscript) and one atom of oxygen (no subscript is the same as "1"). Since each mole is 126.737 grams, you multiply 3.5 mols by 126.737 grams, giving you 443.58 grams. Retrieved from https://www.thoughtco.com/avogadros-number-chemistry-problem-example-609542. Molecular weight calculation: 12.0107*9 + 1.00794*8 + 15.9994*4. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. b) A one-gram sample of aspirin contains 85.2% by mass of C9H8O4. Your friend throws the ball upward at exactly the same time that you drop yours from the window. You can view more details on each measurement unit: molecular weight of C9H8O4 or mol This compound is also known as Aspirin. The products of the complete combustion of a hydrocarbon are carbon dioxide and water. # of Atoms: 4 The molecular weight of a substance is the mass of one molecule of the substance, while the molar mass is the mass of one mole of the substance. A molecule is composed of two or more atoms. 1. (b) What is the mass, in grams, of 0.0573 mol of iron(III) When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. A. It appears as a crystalline powder which is colourless to white. 35,000 worksheets, games, and lesson plans, Marketplace for millions of educator-created resources, Spanish-English dictionary, translator, and learning, Diccionario ingls-espaol, traductor y sitio de aprendizaje, a Question Look up the atomic mass of each element in a periodic table. the mass in grams of a mole of any pure substance atomic mass the mass in amus of an atom of an element Avogadro's number the number of representative particles in a mole of a substance mole (mol) 6.02 x 10^23 representative particles of a substance empirical formula the formula that gives the lowest whole-number ratio of the elements in a compound
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