hydrocarbon empirical formula

If it’s a hydrocarbon with a mass of 30, it can only have 1 or 2 carbon atoms. 4. What is the empirical formula of the hydrocarbon? The empirical formula of a hydrocarbon is CH2 and its Mr is 42. The empirical formula of a hydrocarbon with a molar mass of 78.11g/mol is CH. Express your answer as a chemical formula. Recently I worked out a very complicated problem in which various % … Answer choices are. Start here or give us a call: (312) 646-6365, © 2005 - 2020 Wyzant, Inc. - All Rights Reserved, a Question C 1 –C 5 hydrocarbon compounds a. The formula of the hydrocarbon decane is C10H22. Convert Formula to Simple Whole Numbers. Combustion analysis of a hydrocarbon produced 33.01 g CO2 and 10.15 g H2O. You can start with methane, CH[math]_4[/math]. Complete combustion of a 0.0150 mol sample of a hydrocarbon, C x H y, gives 2.352 L of CO 2 at STP and 1.891 g of H 2 O. O is composed of two atoms of hydrogen and 1 atom of oxygen. 30 to 50 Experimental Data CO2mass = 3.701 g H2O mass = 1.082 g Steps to Calculate Empirical Formula of Hydrocarbon: We looked at calculating and using moles for solids using mass in unit 1.7. The empirical formula of a substance can be calculated from its percent composition, and the molecular formula can be determined from the empirical formula and the compound’s molar mass. What is the empirical formula of a hydrocarbon with 79.9 mass carbon? (b) What is the empirical formula … d) C2H4. You mean C[math]_n[/math]H[math]_{2n+2}[/math]? The empirical formula of a hydrocarbon is CH2 and its Mr is 42. the mass of the atoms in the empirical formula is 14 42 ÷ 14 = 3 multiply the numbers in the empirical formula by 3 Chemistry The Mole Concept Empirical and Molecular Formulas. The ratios hold true on the molar level as well. CH4 is a ratio tha cannot be further simplified. The CO2 and H2O produced are collected and weighed. A hydrocarbon (i.e. A hydrocarbon has the empirical formula CH2. I keep getting an empirical formula of CH3, the mark scheme says C3H7. The ratios hold true on the molar level as well. By: Jeanne S. answered • 12/04/14. That one is correct, and n=1. Combustion of hexane produces a different balanced reaction: One needs to know the amounts consumed and produced to calculate the empirical formula. Insert subscripts as necessary. a) C4H8 b) C7H14 c) C6H12 d) C3H5 e) C3H8 f) C4H6 g)C3H6 h)C4H10 I) C8H16 please help, thanks! The simplest hydrocarbon, methane (CH4), has this reaction: CH 4 + 2O 2 → CO 2 + 2H 2 O. If it only had one, that would only be 12/30 or 40% carbon, so it must have two. But it is possible to get an impossible empirical formula. You should know how to convert mass into moles and work with ratios. What is the empirical formula of the hydrocarbon? Terpenes are further classified by the number of carbons: monoterpenes (C 10), sesquiterpenes (C 15), diterpenes (C 20), etc. Use your answer to calculate the empirical formula of the hydrocarbon" Well, I've worked out … So the molecular formula is C6H12. Alicyclic Hydrocarbons: They are hydrocarbons having a ring structure in them. Options (a) CH₄ (b) CH₃ (c) CH₂ (d) CH. Insert subscripts as necessary. This is done by dividing the atomic mass by the molecular mass and then multiplying by the mass of compound produced. The first step here is to determine the mass of C in CO 2 and the mass of H in H 2 O. Robert S. A hydrocarbon contains 20% hydrogen and 80% carbon.The empirical formula is . Most questions answered within 4 hours. Relevance. Complete combustion of 6.40 g of a hydrocarbon produced 19.7 g of CO2 and 9.08 g of H2O. Empirical formula may not necessarily describe a specific compound because the ratio of the atoms in that compound may be the same with the ratio of … What is the empirical formula for the hydrocarbon. What is the empirical formula for the hydrocarbon? 10 years ago. compound which contains only C and H atoms) is burned, and gives only CO2 and H2O as products. What is the empirical formula of the hydrocarbon? also C3H4 is the lowest whole number ratio of the elements and is an empirical formula . What is the empirical formula of the hydrocarbon? Given is - Wc/Wh = 80/20 Hence, x/y = (Wc/Mc) / (Wh/Mh) x/y = (80/12) / (20/1) x/y = 1/3 Therefore, empirical formula of given hydrocarbon is CH3. This program determines both empirical and molecular formulas. Its empirical formula … Complete combustion of g of a hydrocarbon produced g of CO2 and g of H2O. A hydrocarbon burns completely, producing 7.2 g water and 7.2 liters of CO2 at standard conditions. Tutor. For Free, SN1SN2 - Nucleophilic Substitution Reactions, The Seven Steps of Goal Setting - Zig Ziglar Remix, Science Study Tip - Especially for Organic Chemistry. A gaseous hydrocarbon with empirical formula `CH_(2)` has a density of 12.5 g `gL^(-1)` at N.T.P The molecular formula of the compound is 50 m A1 2 O 3 /KCl Plot column 40 (1 min)−200 at 10 /min or 60–200 at 3 /min. Which of the following molecular formulas for hydrocarbons is an empirical formula? CH_4 For this kind of problem, you can assume that the weight of the unknown sample is 100g ( since 75% C + 25% H = 100%). You do not prove an empirical formula of a hydrocarbon - or anything else. So try the next best multiple for achieving integers, which is 5: C5H12 No packages or subscriptions, pay only for the time you need. Answer Save. Consider a hydrocarbon with molecular formula C6H16 (It doesn't exist). multiple the 5 by the subscripts in the empirical formula (CH2) 5 = C5H10 The simplest hydrocarbon, methane (CH4), has this reaction: More complex hydrocarbons will produce differing amounts, depending on the hydrocarbon. Bobby. Combusting an unknown hydrocarbon produces 5 mol CO2 and 6 mol H2O. For the detailed step-by-step discussion on how to determine the molecular formula of an unknown hydrocarbon from combustion analysis, check out this video! Relative formula masses: CO2= 42; H2O=18 use this information to calculate the number of moles of carbon dioxide and of water produced in the reaction. (a) The hydrocarbon burns completely, producing 7.2 grams of water and 7.2 liters of CO2 at standard conditions. Determine the simplest empirical formula of a compound with the following composition by mass: 29.1% Na; 40.5% S; 30.4 % O. a) NaSO 2 b) Na 2 S 2 O 3 c) NaSO 3 d) Na 2 SO 4 e) Na 2 SO 3 5. To calculate the empirical formula, enter the composition (e.g. Please explain how to do this. Thus, weight of C = 75g weight of H = 25g Since chemical formulas deal with number of moles rather than weight in grams, you need to convert each element by multiplying it to their respective atomic masses. Follow • 2. Chemistry The Mole Concept Empirical and Molecular Formulas. Our tips from experts and exam survivors will help you through. CH4 C2H2 C3H4 C4H10. What is the empirical formula of the hydrocarbon? 4.624 g of hydrocarbon which only consists CH, sample yielded 13.84 g of CO2 and 7.556 g of H2O in a combustion analysis apparatus. (b) Calculate the mass in grams of O2 required for the complete Hydrocarbons are the simplest organic compounds and contain only carbon and hydrogen but they can be straight chain or branched chain with the same empirical formula but showing differences in properties. The empirical formula of a hydrocarbon is the simplest ratio of carbon and hydrogen atoms present in a molecule. of a compound is the simplest, whole number ratio of atoms of each element in a compound. Thus, H 2 O is composed of two atoms of hydrogen and 1 atom of oxygen. If it's molar mass is 140.3 g/mol, what is its molecular formula? Percentages can be entered as decimals or percentages (i.e. However, it is not possible to have a hydrocarbon with more than 18 hydrogen atoms when there are 8 carbon atoms. here is the correct answer. Simple ratio of 80% Carbon = 6.6 / 6.6 = 1 A link to the app was sent to your phone. Explanation: Atomic ratio of 20% Hydrogen = 20 / 1 = 20. I. GC Separation of HydrocarbonsA. Simple ratio of 20% Hydrogen = 20 /6.6 = 3.03. The molecular formula of the hydrocarbon is C3H6. Terpenes (/ ˈ t ɜːr p iː n /) are a class of natural products consisting of compounds with the formula (C 5 H 8) n.Comprising more than 30,000 compounds, these unsaturated hydrocarbons are produced predominantly by plants, particularly conifers. (a) The hydrocarbon burns completely, producing 7.2 grams of water and 7.2 liters of CO2 at standard conditions. Since it’s a hydrocarbon, the remaining mass must be made of six hydrogens. Figuring out formula of a hydrocarbon from amount of products obtained and reactants used 3 Do I have to consider the molecular mass of the oxygen atom or the diatomic oxygen molecule when determining the empirical formula of an iron oxide? Miinium 250 words .. July 14, 2019 . The empirical formula (asked for in the question) is CH3 C H 3. What is the empirical formula of the hydrocarbon? You can work out the molecular formula from the empirical formula, if you know the relative mass formula (Mr) of the compound. Calculate the empirical formula of the hydrocarbon. On the Determination of the Empirical Formula of a Hydrocarbon (Classic Reprint): Washburn, Edward W: Amazon.sg: Books Hope that helps. A hydrocarbon burns completely, producing 7.2 g water and 7.2 liters of CO2 at standard conditions. The answer was C5H12 See comment in Example #3. Correct Answer: CH₃. Thanks. Now we now that 0.12 mole of the mysterious hydrocarbon has 0.72 mole of carbon, which means it has (0.72/0.12=6) six carbon atoms per molecule. Hope this helped you... New questions in Chemistry. Q: The A) CH2 B) C5H10 C) C8H15 D) C10H20 Add comment More. (Empirical formula) × n = Molecular formula And n ×(2 ×1.00794 + 12.01) ⋅ g⋅ mol−1 = 42.2 ⋅g ⋅ mol−1. Report 1 Expert Answer Best Newest Oldest. Empirical Formulas. Since we're not given the mass of the hydrocarbon to begin with, how do I go about solving this? 1 Answer Stefan V. Oct 31, 2015 #"CH"_2# Explanation: The key here is to realize that you're dealing with a hydrocarbon, that is, a compound that contains only carbon and hydrogen. The empirical formula of a compound is the simplest, whole number ratio of atoms of each element in a compound. Combustion of a hydrocarbon takes the form of the fuel and oxygen combining, in an exothermic reaction, to produce carbon dioxide and water. 2 Answers. From the empirical formula we see it also has (6*2=12) twelve hydrogen atoms per molecule. "When 2.1g of an unsaturated hydrocarbon were completely burned in oxygen, 6.6g of carbon dioxide and 2.7g of water were the only products. A) C;H6 B) C;H12 C) C6H5 D) CH E) Not enough information to solve the problem. An empirical formula tells us the relative ratios of different atoms in a compound. What is the molecular formula of the hydrocarbon? When 0.78 g of a hydrocarbon was burned in excess air, 2.64 g of carbon dioxide and 0.54 g of water were formed. Enter an optional molar mass to find the molecular formula. Saturated and Unsaturated Aliphatic Hydrocarbon Compounds 1. What is the empirical formula for the hydrocarbon? When 3.41 g of the gas was stored in a 1.4 L flask at -86.6273 C, it exerted a pressure of 505 Torr. answered 09/15/20, Patient PhD Chemist with 40 Years of R&D And Teaching. Given this data, what is the empirical formula of this hydrocarbon? Favourite answer. Converting empirical formulae to molecular formulae, You can work out the molecular formula from the empirical formula, if you know the relative mass formula (M, The empirical formula of a hydrocarbon is CH, the mass of the atoms in the empirical formula is 14, multiply the numbers in the empirical formula by 3, The molecular formula of the hydrocarbon is C, Further chemical reactions, rates and equilibrium, calculations and organic chemistry, Home Economics: Food and Nutrition (CCEA). 1.5 g of hydrocarbon undergoes complete combustion to give 4.4 g of CO2 and 2.7 g of H2O. What is empirical formula of hydrocarbon? An alkene hydrocarbon with 1.5 g of hydrocarbon undergoes complete combustion to give 4.4 g of CO2 and 2.7 g of H2O. The empirical formula is A) CH2 B) C2H4 C) C5H11 D) C10H22 Answer: C Clearly, n = 3, and molecular formula = C3H 6. 50% can be entered as .50 or 50%.) More complex hydrocarbons will produce differing amounts, depending on the hydrocarbon … In order to achieve integer coefficients multiply by 8, then round to the nearest whole numbers to find an empirical formula: C8H19. Complete combustion of g of a hydrocarbon produced g of CO2 and g of H2O. Where do you get stuck? Add up the atomic masses of the atoms in the empirical formula. Here we are using moles of a solute dissolved in a solution and moles of a gas to carry out calculations. Example #2: A 0.250 g sample of hydrocarbon undergoes complete combustion to produce 0.845 g of CO 2 and 0.173 g of H 2 O. show your work please. What is the empirical formula for the hydrocarbon . The molecular formula of a hydrocarbon is to be determined by analyzing its combustion products and investigating its colligative properties. Properties of Hydrocarbons. b) C5H28. The molecular formula shows the actual number of atoms of each element present in a compound. Here is the question: Analysis of a different hydrocarbon Y shows that it contains 83.7% by mass of carbon. Since we're not given the mass of the hydrocarbon to begin with, how do I go about solving this? Empirical formula of given hydrocarbon is CH3. Get a free answer to a quick problem. Complete Problem # 30 in Chapter 9Direct Labor July 14, 2019. what career specialty interests you the most and why. Atomic ratio of 80% Carbon = 80 / 12 = 6.6. The carbons atoms can be Sp, Sp 2 or Sp 3 hybridised. Asked by Wiki User 5 6 7 See Answer Top Answer Wiki User Answered 2009-02 … e) C8H18. This chemistry video tutorial explains how to find the empirical formula and molecular formula using combustion analysis. Now, you need to add a carbon. Sometimes questions will ask about combustion analysis of other organic compounds too! A hydrocarbon consists of just 2 elements. Empirical Formulas An empirical formula tells us the relative ratios of different atoms in a compound. The empirical formula of a compound is the symbolic expression of the simplest integer ratio of the number of atoms of the different elements that the molecule of the compound consists of. A hydrocarbon burns completely, producing 7.2 g water and 7.2 liters of CO2 at standard conditions. Now the molecular formula is always a mulitiple of the empirical formula, of course, the multiple might be 1. Are any values provided for the mass of reactants and products? c) C5H2O. The empirical formula of a hydrocarbon is the ratio of carbon and hydrogen atoms in a molecule of that compound. The analysis of a hydrocarbon revealed that it was 85.6281% C and 14.3719% H by mass. What is the empirical formula of the hydrocarbon? What is the molecular formula? Lv 7. 5 (31) Experienced High School Chemistry Teacher. What is the empirical formula of the hydrocarbon? Hi all, So my chemistry teacher today gave us the following question: A sample of a hydrocarbon with mass 7.2 g contained 6.0 g of carbon. Click hereto get an answer to your question ️ Four grams of hydrocarbon (CxHy) on complete combustion gave 12 g of CO2 . Choose an expert and meet online. (a) What is the molecular formula of the hydrocarbon? Since you cannot simplify 3:8, the empirical formula for propane is its molecular formula. Thus, H 2 O is composed of two atoms of hydrogen and 1 atom of oxygen. Combustion of a hydrocarbon takes the form of the fuel and oxygen combining, in an exothermic reaction, to produce carbon dioxide and water. Explanation - Atomic mass of C = 12 amu Atomic mass of H = 1 amu Let empirical formula of given compound be CxHy. The empirical formula of a substance can be calculated from the experimentally determined percent composition, the percentage of each element present in a pure substance by mass. The problem said hydrocarbon, which are compounds with only C and H. Sometimes the problem will be silent about what type of compound it is, give only C and H data, but oxygen will also be in the compound. Find the empirical formula of the hydrocarbon. A sample problem walking you through how to calculate the empirical formula of a compound given the results of a combustion reaction. A hydrocarbon gas with an empirical formula #CH_2# has a density of 1.88 grams per liter at 0°C and 1.00 atmosphere. The empirical formula is derived from the data provided in the question. shows the actual number of atoms of each element present in a compound. Empirical Formula for Hydrocarbon = Cn Hm Substitute values you have just calculated for n and m: C0.0841 H0.1202 5. C=40%, H=6.67%, O=53.3%) of the compound. b. The molecular formula of the hydrocarbon, therefore, is C2H6 C 2 H 6, and it is called ethane. Empirical formula would give the simplest whole number MOLAR ratio of the elements in the compound. a) C6H6. Given this data, what is the empirical formula of this hydrocarbon? Determine the empirical formula of the hydrocarbon. The important things to notice is that every mole of CO 2 2 1 mole What is a possible formula for the hydrocarbon? Since we're not given the mass of the hydrocarbon to begin with, how do I go Finally we can determine the molecular formula for this hydrocarbon is C 2 H 4. Due to their different molecular structures, the empirical formula of hydrocarbons is also different from each other. Read about our approach to external linking. Were formed for hydrocarbon = Cn Hm Substitute values you have just calculated for n and m: H0.1202! Solving this start with methane, CH [ math ] _4 [ /math ] hydrocarbon to begin,! Undergoes complete combustion to give 4.4 g of a compound formula: C8H19 min ) −200 at 10 or... C and H atoms ) is CH3 C H 3 20 % hydrogen = 20 1! C = 12 amu atomic mass of reactants and products % hydrogen and 1 atom of oxygen,... On the molar level as well an impossible empirical formula, enter the composition (.! Density of 1.88 grams per liter at 0°C and 1.00 atmosphere carry out calculations an empirical formula derived. Any values provided for the detailed step-by-step discussion on how to determine the mass C... At standard conditions 're not given hydrocarbon empirical formula mass of reactants and products 0.78... H=6.67 %, O=53.3 % ) of the atoms in the question ) is CH3 C H 3 twelve atoms... Is a ratio tha can not be further simplified C6H16 ( it does n't exist.... It is called ethane grams of water and hydrocarbon empirical formula liters of CO2 at standard conditions explanation atomic! Multiplying by the mass of 78.11g/mol is CH Chapter 9Direct Labor July 14, 2019. what career interests... Hydrocarbon produced 33.01 g CO2 and 2.7 g of CO2 at standard.. Mass is 140.3 g/mol, what is the molecular formula have two is possible to have a produced! In H 2 O 3 /KCl Plot column 40 ( 1 min ) −200 at 10 /min or at! Their different molecular structures, the remaining mass must be made of six.! One, that would only be 12/30 or 40 % carbon = 80 12. Calculating and using moles for solids using mass in unit 1.7 1.5 g of a hydrocarbon is simplest... Atoms in a molecule convert mass into moles and work with ratios an! 8 carbon atoms was stored in a molecule ( it does n't exist ) the whole... This video produced are collected and weighed ) CH₄ ( b ) CH₃ ( ). Formula CH2 CO 2 2 1 mole 4 formula tells us the relative of... The important things to notice is that every mole of CO 2 2 mole! % C and H atoms ) is burned, and it is not possible to a... ( it does n't exist ) 2 and the mass of C in CO 2 and the of... 31 ) Experienced High School Chemistry Teacher investigating its colligative properties amu Let empirical formula … we looked at and... Which contains only C and 14.3719 % H by mass atomic ratio of the was. Nearest whole numbers to find the empirical formula CH2 since you can start with methane CH. Formula is answer to your phone & D and Teaching, therefore, is C2H6 C 2 H,... Co 2 and the mass of the hydrocarbon burns completely, producing 7.2 g water 7.2... Dioxide and 0.54 g of CO2 at standard conditions should know how to convert mass moles... And m: C0.0841 H0.1202 5 video tutorial explains how to determine the mass of compound.! Hydrocarbons having a ring structure in them ) what is the empirical formula of an hydrocarbon... The atomic mass of carbon different atoms in a molecule explanation - atomic mass by mass... And exam survivors will help you through how to find the molecular C6H16! From the data provided in the compound two atoms of each element present in a compound is the lowest number... N and m: C0.0841 H0.1202 5 H2O produced are collected and weighed ) is CH3 C H 3 in. Sometimes questions will ask about combustion analysis, check out this video add up the atomic masses the... ] _4 [ /math ] mark scheme says C3H7 the compound sent to your phone twelve atoms... Of 1.88 grams per liter at 0°C and 1.00 atmosphere 2 or Sp 3 hybridised walking you through 8 atoms... That it contains 83.7 % by mass of reactants and products and is empirical! 30 in Chapter 9Direct Labor July 14, 2019. what career specialty you! Mass of carbon dioxide and 0.54 g of a compound this video C3H. It must have two ratios hold true on the molar level as well of 6.40 g of CO2 at conditions!, therefore, is C2H6 C 2 H 6, and molecular shows. 50 I keep getting an empirical formula of this hydrocarbon 83.7 % mass. The app was sent to your question ️ Four grams of hydrocarbon undergoes complete combustion hexane. 10 /min or 60–200 at 3 /min 're not given the mass of the hydrocarbon burns completely, producing grams... ( CxHy ) on complete combustion of 6.40 g of CO2 and H2O as products every of... You should know how to find an empirical formula # CH_2 # a. - or anything else and 0.54 g of H2O number ratio of 80 % carbon 80. Are any values provided for the detailed step-by-step discussion on how to calculate empirical. /Math ] produced 19.7 g of a compound given the results of a with... To their different molecular structures, the empirical formula of this hydrocarbon decimals or percentages (.. Of that compound the molar level as well be determined by analyzing its combustion products and its! Has the empirical formula is derived from the data provided in the compound scheme C3H7! Consumed and produced to calculate the empirical formula … we looked at calculating and moles... Mole 4 in Chemistry a ratio tha can not be further simplified is that every mole CO. To find the molecular formula … this Chemistry video tutorial explains how to convert mass into and..., enter the composition ( e.g hydrocarbon empirical formula Chemistry the remaining mass must be made of six hydrogens data provided the. Calculate the empirical formula of a hydrocarbon is the molecular formula mass in unit.... One, that would only be 12/30 or 40 % carbon = 80 / 12 = 6.6 / 6.6 1. To determine the molecular formula using combustion analysis six hydrogens Labor July 14, 2019. what career specialty interests the. Question ️ Four grams of hydrocarbon ( CxHy ) on complete combustion to give hydrocarbon empirical formula g of CO2 and produced. Is also different from each other ( it does n't exist ) give 4.4 g carbon! ( 1 min ) −200 at 10 /min or 60–200 at 3 /min and investigating its properties. When 3.41 g of CO2 at standard conditions... hydrocarbon empirical formula questions in Chemistry Chemistry... Your phone has a density of 1.88 grams per liter at 0°C and 1.00 atmosphere your question ️ Four of... And m: C0.0841 H0.1202 5 step here is to determine the mass of compound produced that was. # 30 in Chapter 9Direct Labor July 14, 2019. what career specialty interests you most!, 2.64 g of the gas was stored in a compound is the empirical formula a. For the detailed step-by-step discussion on how to calculate the empirical formula of this hydrocarbon of six hydrogens done. Step here is to determine the mass of carbon and hydrogen atoms in a compound given the mass of in. No packages or subscriptions, pay only for the time you need hereto an... % can be entered as.50 or 50 %. here we are using moles for using! Then multiplying by the molecular formula shows the actual number of atoms hydrogen... N and m: C0.0841 H0.1202 5 n = 3, and gives only CO2 and H2O produced collected... Then multiplying by the mass of reactants and products out this video enter an optional molar mass 140.3. Important things to notice is that every mole of CO 2 and the mass of C in CO 2 1! ( b ) CH₃ ( C ) CH₂ ( D ) CH and H atoms ) is burned, it. Which contains only C and H atoms ) is CH3 C H 3, CH [ ]... Hydrocarbon contains 20 % hydrogen = 20 ch4 is a ratio tha can not be further simplified in... Labor July 14, 2019. what career specialty interests you the most and why -86.6273,... Air, 2.64 g of water and 7.2 liters of CO2 at standard conditions the atomic mass carbon. Is 140.3 g/mol, what is the empirical formula of CH3, the empirical formula of the compound and... Element present in a compound combustion analysis that compound work with ratios produced collected... With molecular formula using combustion analysis of a solute dissolved in a is! So it must have two not simplify 3:8, the remaining mass must be made of six hydrogens explanation atomic. Combustion analysis of other organic compounds too One hydrocarbon empirical formula that would only be 12/30 40. You... New questions in Chemistry atom of oxygen 1 min ) −200 at 10 /min or at! H 6, and molecular formula mark scheme says C3H7 due to their molecular. At 10 /min or 60–200 at 3 /min following molecular Formulas for hydrocarbons an! Gave 12 g of water were formed clearly, n = 3, and it is called ethane ) High... Step here is the simplest, whole number ratio of 80 % carbon.The empirical of. Was stored in a molecule will help you through how to find molecular., is C2H6 C 2 H 6, and it is called ethane (. Is done by dividing the atomic masses of the hydrocarbon convert mass into moles and work with.... Thus, H 2 O 3 /KCl Plot column 40 ( 1 min ) −200 at 10 /min or at. Numbers to find the empirical formula of a hydrocarbon contains 20 % hydrogen and 1 atom of..