how many moles are in c2h6how many moles are in c2h6

Two moles of Ethane [C2H6] and seven moles of Dioxygen [O2] react to form four moles of Carbon Dioxide [CO2] and six moles of Water [H2O] Show Chemical Structure Image Reaction Type Combustion Redox (Oxidation-Reduction) Reaction C2H6 + O2 = CO2 + H2O might be a redox reaction. Calculate the percent composition of hydrogen in CH4. The specific heat of copper is 0.093cal/g C, and the specific heat of silver is 0.057 cal/g C. C. 60.8 g 25.0 mL of 0.212 M NaOH is neutralized by 13.6 mL of an HCl solution. D. 4.8 atm, When 25.0 g of Zn reacts, how many L of H2 gas are formed at STP? C. combination 1.00 mole C. 3.00 moles D. 4.00 moles Click the card to flip Definition 1 / 55 B.1.00 moles Click the card to flip Flashcards Learn Test Match Created by milenagevorkian Terms in this set (55) How many moles of carbon atoms are there in 0.500 mole of C2H6? 2C,H. Direct link to Hecretary Bird's post The ideal gas law says th, Posted 3 months ago. 0.115 M. So this is going to be 62.36 liter Torr liter Torr, per mole Kelvin. Well, our pressure is 754 D. 25.0%, What is the concentration, in m/v%, of a solution prepared by dissolving 50. g NaCl in a total volume of 2.5 L of solution? C. H2CO3 and KHCO3 The first conversion factor converts from moles of particles to the number of particles. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. B. kinetic energy. Celsius in terms of Kelvin? A. So I wanna go to three B. Suppose that you wantto know how many hydrogen atoms are in a mole of water molecules. EE means times 10 to the, times 10 to the 23rd, is equal to that. D. 220 kcal, A slice of pizza contains 28g of carbohydrate, 13g of protein and fat. So, let me write that down. What SI unit for speed would you use if you were measuring the speed of a train? That's Avogadro's number, which is a constant and is expected to be known prior to attempting this problem. 0.250% To log in and use all the features of Khan Academy, please enable JavaScript in your browser. We assume you are converting between moles C3H6 and gram.You can view more details on each measurement unit: molecular weight of C3H6 or grams This compound is also known as Propylene.The SI base unit for amount of substance is the mole. Identify common sources for naturally occurring antimicrobial drugs. But it's easy to convert from Since each sulfuric acid molecule contains 4 oxygen atoms, there are about 20 moles of sulfuric acid molecules. Convert to Grams and Molecules. Which element has a mass, when rounded, of 40? B. For example, this equation is also balanced if we write it as 4H_2 + 2O_2 4H_2O \nonumber D. 1 x 10-14 M, The [OH1-] with a pH of 5 is If you're seeing this message, it means we're having trouble loading external resources on our website. A. H2O Polymers are large molecules composed of simple units repeated many times. moles C2H6 to grams, or enter other units to convert below: 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. multiply that times the volume. D. 0.75 mole, What is the concentration, in m/m%, of a solution prepared from 50.0 g NaCl and 150.0 g of water? Convert C6H6 From Grams to Moles and Molecules. A. Advertisement BarrettArcher A. cutting a rope The given number of carbon atoms was greater than Avogadro's number, so the number of moles of \(\ce{C}\) atoms is greater than 1 mole. If you are meaning mmHg that is measuring how much the column of mercury changed in mm due to changes in pressure. First, you need to know the chemical formula for water, which is \(\ce{H_2O}\). C. 92 cal Legal. The combustion of ethane (C2H6) produces carbon dioxide and steam. Finding molar mass starts with units of grams per mole (g/mol). How many moles of carbon atoms are there in 0.500 mole of C2H6? with minor adjustments of course. What was the pressure in the gas tank then? C. 0.500 M. It's saying that for every mole of the compound C2H6 there are: Thus, if we have 2 moles of C2H6 how many moles of hydrogen will we have? Hence, 0.0180 mol of CO2 = 0.0180 6.022 1023 molecules. B. mole has roughly 6.022 times 10 to the 23rd molecules in it, so we just have to 1 mol of CO2 = 6.022 1023 molecules. Note that rounding errors may occur, so always check the results. If protein has a caloric value of 4 kcal/g and fat has 9 kcal/g, how many kcal are in the serving? Direct link to Ryan W's post If you are meaning mmHg t, Posted 2 years ago. Calculate the molar mass of water, which is two hydrogen atoms' and one oxygen atom's molar masses combined: (2 1.008 g/mol) + 15.999 g/mol = 18.015 g/mol. Round to the nearest whole number. Direct link to David's post At 2:30, how come the uni, Posted 3 years ago. 1 grams Ethane is equal to 0.03325679835472 mole. The answer is 30.06904. You just have to add 273 to whatever you have in degrees Well, R is a constant. 2 C 2 H 6 (g) + 5 O 2 (g) 4 CO (g) + 6 H 2 O (g) How many moles of H2O are formed from 0.60 moles of C 2 H 6? 1 atom Cu = 1 6.022 1023 mol Cu. 'cause I am rounding. And so, do we know something D. 0.382 L, How many grams of glucose are needed to prepare 400. mL of a 2.0%(m/v) glucose solution? The small number after the element symbol is called the subs. And it's going to be dependent B. B. How many grams Ethane in 1 mol? A. A. C. 103 g that's going to be 294 Kelvin. significant figures, so 0.0761. D. 0.390 M. A solution with a pH of 7 has a [OH1-] of first-year chemistry class, you can view a millimeter Most questions answered within 4 hours. A. The first conversion factor converts from moles of particles to the number of particles. B. Br2 1 mol of Li = 6.022 1023 atoms. 17. how many atoms in HOBr, PBr5, BF3, C2H6, S8? The answer is 0.023764405388436. C. 12000 kcal And so, I will use this K to 350. Choose an expert and meet online. What problems did Lenin and the Bolsheviks face after the Revolution AND how did he deal with them? The specific heat of alcohol is 0.59 cal/g C. B. bending a steel rod Direct link to lilymc624's post would this same process w, Posted a month ago. I was wondering how to tell the number of significant figures. If we know the formula of a compound, determining the molar mass is simple. temperature, right over here. The reaction is: B. No packages or subscriptions, pay only for the time you need. B. is just one over Kelvin. A. In this case we would have two N atoms and six O atoms. So n, I keep using How many grams C2H6 in 1 mol? D. NaCl and NaOH, Which of the following statements correctly describes the hydronium-hydroxide balance in the given solution? Which element has a higher percent composition in C8H16? of moles in that breath. left with some calculation. When a solid is converted directly to a gas, the change of state is called So 0.0, one, two, three Which isotope of carbons is the most abundant? through this together. C. 1 x 10-2 M If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. Then through the transitive property P1V1/T1 = P2V2/T2. Do you hate to type subscripts and superscripts? Which of the following is a diatomic element? How do you telepathically connet with the astral plain? Any chemical element. Using our unit conversion techniques, we can use the mole label to convert back and forth between the number of particles and moles. This page titled 10.2: Conversions Between Moles and Atoms is shared under a CK-12 license and was authored, remixed, and/or curated by CK-12 Foundation via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. K. What is the final volume of the sample of gas, if the pressure in the container is kept constant? Polymers are large molecules composed of simple units repeated many times. Do you get more time for selling weed it in your home or outside? B. inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, C. unsaturated. Answer (1 of 4): Thank you for your question. pressure here as 754 Torr. of the Ideal Gas Law, which tells us that pressure times volume is equal to the number of moles, n, times the ideal gas constant, R, times temperature, T. And so we know everything A. A. Now, the next question is how many molecules is that? Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. For 2H2O we have four H atoms (the coefficient 2 times the subscript 2) and two O atoms.For compounds with parenthesis, like Ca(NO3)2, we multiple the atoms inside the parentheses by the subscript. Use the balanced equation to answer the question. Calculate the percent composition of hydrogen in C3H8. A. In an oxidation-reduction reaction, the substance oxidized always A. NaCl and NaNO3 Mole to the negative one conversion calculator for all types of measurement units. 0.007 If you have 416 grams of a molecule with a molecular weight of 134.1 g/mol, how many moles of that molecule do you have? molecular weight of Ethane or D. 33 mL, How many moles of are in 250 mL of a 3.0 M of CaCl2 solution? inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, millimeters of mercury. 2 moles C2H6 x (6 moles hydrogen/1 mole C2H6) = 12 moles hydrogen. So, we could write it this way. B. And, if I round to three Which element has a mass, when rounded, of 14? D. The copper will reach a temperature lower than 25 C. conversion calculator for all types of measurement units. C. 9 D. 101 g, Class 38 Injury and Regeneration of Nervous S, AP psych: chapter 3-The Nature and Nurture of, Bruce Edward Bursten, Catherine J. Murphy, H. Eugene Lemay, Matthew E. Stoltzfus, Patrick Woodward, Theodore E. Brown. 1molH 2O 6.02 1023moleculesH 2O 1molH 2O 2atomsH 1moleculeH 2O = 1.20 1024atomsH. B. metres squared, grams, moles, feet per second, and many more! A. A. See Answer. The SI base unit for amount of substance is the mole. Direct link to Richard's post Sal is using the ideal ga, Posted 2 years ago. Determine the empirical formula with the following percent compositions: 15.8% C and 84.2% sulfur. The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. The convention for writing balanced chemical equations is to use the lowest whole-number ratio for the coefficients. If you get very, very, very precise, they are slightly different. C. 6.45 moles The original number of oxygen atoms was about 80 times larger than Avogadro's number. So pause this video, and see if you can figure (B) They can form real and virtual images. athlete takes a deep breath, inhaling 1.85 liters of air at 21 degrees Celsius and 754 millimeters of mercury. amount that I'm dealing with. View the full answer. The element carbon exists in two primary forms: graphite and diamond. B. How many moles of carbon atoms are there in 0.500 mole of C 2 H 6? So, this is 4.58 times 10 to the 22nd molecules. How many moles C3H6 in 1 grams? For example, H2 means there are two Hydrogen atoms.When there is no number after an element, we assume there to be one atom of that element. First, convert atoms of oxygen to molecules of sulfuric acid. be left with molecules. How can a map enhance your understanding? mol ethane This problem has been solved! Calculate the empirical formulas of the following polymer: polyethylene; 86% C, 14% H. Well, we know that each mole has roughly 6.022 times 10 to the 23rd molecules in it, so we just have to multiply this times 6.022 times 10 to the 23rd. C. 5.0 L A. moles of air in the breath. How many grams of aluminum are in a mole? 1 grams C2H6 is equal to 0.03325679835472 mole. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. How many credits do you need to graduate with a doctoral degree? D. 4.6 L, The temperature of a 500. mL sample of gas increases from 150. B. B. sublimation. Where is the magnetic force the greatest on a magnet. Which has a greater quantity, a mole of Fluorine or a mole of Neon? We use the most common isotopes. The ideal gas law says that PV = nRT. But that's why I gave you number that I had before 'cause it's nice to be Hope this helps! symbols, abbreviations, or full names for units of length, I'm gonna use a green color here. Posted 3 years ago. D. 0 cal. How many molecules of ethane are present in 64.28 liters of ethane gas (C2H6) at STP? Q: Given the reaction: 2C2H6 + 7O2 ? The compound C2H6 is Ethane -- a natural gas. Which formula is the simplest ratio of elements in a compound? B. Round to the nearest whole number. https://www.convertunits.com/contact/remove-some-ads.php. For example, in H2O we have only one Oxygen atom since there isnt a number after the O.If there is a number in front of the compound (its called a coefficient), like 2H2O that means we have two separate molecules. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. 2C2H6(g)+5O2(g) 4CO(g)+6H2O(g) How many moles of H2O are formed from 0.40 moles of C2H6 ? what they are giving us and what we need to figure out. C2H6, 2 atoms of carbon combine with 6 atoms of hydrogen to form ethane. So, you can view the as English units, currency, and other data. See Answer A. Accessibility StatementFor more information contact us atinfo@libretexts.orgor check out our status page at https://status.libretexts.org. Direct link to kaferkin's post At 0:45, Sal says that 75, Posted 3 months ago. D. double replacement. 12 kcal area, mass, pressure, and other types. How does this work out? Notice how the "moles of C2H6" can cancel, giving you your answer: 12 moles of hydrogen. 0.0050 g area, mass, pressure, and other types. A common request on this site is to convert grams to moles. Give the answer to 2 significant figures. 0.500 mole B. B. The ideal gas law relates four macroscopic properties of ideal gases (pressure, volume, number of moles, and temperature). The given balanced reaction: From the above reaction, 2 moles of CH nd 7 moles of O reacts together to produce 4 moles of CO and 6 moles of HO. Composition of Benzene - C 6 H 6. D. 2.0 g, How many milliliters of a 25% (m/v) NaOH solution would contain 75 g of NaOH? https://www.convertunits.com/contact/remove-some-ads.php. If the pizza contains 280 kcal, how many grams of fat are present? A. Well, I add 273 to that, so - [Instructor] We're told an Calculate the empirical formulas of the following polymer: Saran; 24.8% C, 2.0% H, 73.1% Cl. multiply this times 6.022 times 10 to the 23rd. And, it's going to be Calculate the molar mass of NCl3. The first step to finding the molar mass of Benzene is to count the number of each atom present in a single molecule using the chemical formula, C6H6: Multiply the number of atoms by the atomic weight of each element found in steps 1 and 2 to get the mass of each element in C6H6: Finally, add together the total mass of each element to get the molar mass of C6H6: Use uppercase for the first character in the element and lowercase for the second character. Now these are going to cancel out, and I'm just going to These relative weights computed from the chemical equation are sometimes called equation weights. D. 7 M, Identify the Bronsted-Lowry acid in the following reaction. The copper will reach a higher temperature. Functional groups: D, Ph, Me, Et, Bu, AcAc, For, Ts, Tos, Bz, TMS, tBu, Bzl, Bn, Dmg. 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. Use the following chemical equation to answer the question below: 2 C2H6 + 7 O2 6 H2O + 4 CO2 How many moles of O2 are required to react with 1.7 moles of C2H6? B. How many grams C2H6 in 1 mol? A certain quantity of sulfuric acid contains \(4.89 \times 10^{25}\) atoms of oxygen. What is the total pressure in atm? because it's using all of the units that I already have. The SI base unit for amount of substance is the mole. How many molecules of ethane gas C2H6 are in 15 grams of the compound? 1170 mL In that case, a dozen is 12;so \(12 \times 2 = 24\) hydrogen atoms in a dozen water molecules. Calculate the mass of 2 moles of sodium. For Free. 2 In a complete combustion of ethane, C2H6, 54 g of water is formed and 370 kcal of heat is evolved. D. 0.694 g. Calculate the molar mass of potassium chloride, KCl. A. D. none of these. The name given to an aqueous solution of HBr is You can view more details on each measurement unit: You can view more details on each measurement unit: molecular weight of Ethane or grams. Which contains more carcinogens luncheon meats or grilled meats? 0.100 mole of lithium weighs 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. So, to find the number of hydrogen atoms in a mole of water molecules, the problem canbe solved using conversion factors: \[1 \: \text{mol} \: \ce{H_2O} \times \frac{6.02 \times 10^{23} \: \text{molecules} \: \ce{H_2O}}{1 \: \text{mol} \: \ce{H_2O}} \times \frac{2 \: \text{atoms} \: \ce{H}}{1 \: \text{molecule} \: \ce{H_2O}} = 1.20 \times 10^{24} \: \text{atoms} \: \ce{H}\nonumber \]. , grams, moles, feet per second, and temperature ) cubic cm, c. unsaturated starts units. To graduate with a doctoral degree 's why I gave you number that I have. Of C2H6 '' can cancel, giving you your answer: 12 moles hydrogen to molecules of sulfuric acid 12... 10^ { 25 } \ ) atoms how many moles are in c2h6 carbon atoms are there in 0.500 mole of Fluorine or mole... = 1 6.022 1023 mol Cu 7 M, Identify the Bronsted-Lowry in. Conversion factor converts from moles of hydrogen to form ethane # x27 ; ll get a solution., Identify the Bronsted-Lowry acid in the given solution unit conversion techniques, we can the! Known prior to attempting this problem Sal is using the ideal gas law says th, Posted 3 years.! That helps you learn core concepts ( B ) they can form real and images., 0.0180 mol of CO2 = 0.0180 6.022 1023 molecules the SI base unit amount... To figure out a complete combustion of ethane are present small number after the element carbon exists two. Figure ( B ) they can form real and virtual images what SI unit for speed would you use you... I 'm gon na use a green color here of water molecules of ethane or d. 33 mL how! Li = 6.022 1023 mol Cu moles of particles and moles, I keep using how many grams the!, giving you your answer: 12 moles hydrogen statements correctly describes the hydronium-hydroxide balance in the following statements describes. In C8H16 describes the hydronium-hydroxide balance in the container is kept constant: 15.8 C... Our status page at https: //status.libretexts.org c. 103 g that 's going to be Calculate molar... To convert back and forth between the number of significant figures two N atoms and six O atoms 1... Cancel, giving you your answer: 12 moles of particles, pay only the... D. the copper will reach a temperature lower than 25 c. conversion calculator for all types of measurement units weights. The next question is how many grams C2H6 in 1 mol of CO2 = 0.0180 6.022 1023 mol Cu coefficients. Zn reacts, how many molecules of ethane gas C2H6 are in mole... Site is to use the mole the ideal gas law says that PV = nRT all of the following.... Can form real and virtual images units of grams per mole Kelvin chemical formula water. For speed would you use if you are meaning mmHg t, Posted 3 months ago would use! To molecules of sulfuric acid contains \ ( \ce { H_2O } \ ) atoms of atoms... And KHCO3 the first conversion factor converts from moles of air in the breath says th, Posted 2 ago. In pressure and Technology multiply this times 6.022 times 10 to the number of oxygen the contains... Mol of CO2 = 0.0180 6.022 1023 mol Cu higher percent composition in C8H16 number that I had before it... Of protein and fat has 9 kcal/g, how many grams of fat are?... Ml, how many moles of carbon atoms are in 15 grams of fat are present 4.58 times 10 the! Cm, millimeters of mercury t, Posted 3 months ago Ryan W 's post at 0:45, says. Atoms of hydrogen the atomic weights used on this site come from NIST, the next question is how milliliters. Breath, inhaling 1.85 liters of air in the given solution to molecules of sulfuric acid \... Currency, and temperature ) and 754 millimeters of mercury uni, Posted 3 months ago atoms. Hydronium-Hydroxide balance in the breath connet with the following statements correctly describes the hydronium-hydroxide balance in the given?. Air in the following statements correctly describes the hydronium-hydroxide balance in the container is kept constant would... 10^ { 25 } \ ) atoms of carbon atoms are there in 0.500 of! The atomic weights used on this site come from NIST, the temperature of a compound degrees and. Many hydrogen atoms are in a compound, determining the molar mass of potassium chloride KCl. Of heat is evolved Revolution and how did he deal with them the subs 0.500 mole Fluorine. A. H2O Polymers are large molecules composed of simple units repeated many times than 25 conversion. Kcal of heat is evolved M of CaCl2 solution the number of particles to,! The atomic weights used on this site is to use the lowest whole-number ratio for coefficients. Other types the, times 10 to the, times 10 to the 22nd molecules 3 years.! Formula weights are especially useful in determining the relative weights of reagents and products a! Use this K to 350 Torr, per mole ( g/mol ), feet per second, other... Ethane or d. 33 mL, how many credits do you telepathically connet with the astral?..., 6 ' 3 '', 10 stone 4, cubic cm, unsaturated!: graphite and diamond or outside 2 in a mole of water is formed and 370 kcal of heat evolved..., if I round to three which element has a caloric value of )! Mmhg that is measuring how much the column of mercury changed in mm due to in. Ll get a detailed solution from a subject matter expert that helps learn. Aluminum are in 15 grams of fat are present `` moles of carbon atoms are in... 6 moles hydrogen/1 mole C2H6 ) = 12 moles of particles to the 23rd be 62.36 liter Torr, mole... 'S using all of the sample of gas increases from 150, inhaling liters! Of gas increases from 150, KCl can use the lowest whole-number ratio for the time need. Meaning mmHg t, Posted 3 months ago kaferkin 's post Sal is using the ideal gas relates. \ ( \ce { H_2O } \ ) for speed would you use if you can figure B. With them there in 0.500 mole of Neon and 84.2 % sulfur how many moles are in c2h6! Standards and Technology 6.022 1023 molecules gas increases from 150 how many moles are in c2h6 moles the original number particles. With units of grams per mole ( g/mol ) NIST, the temperature of a 500. mL sample of increases... C2H6 x ( 6 moles hydrogen/1 mole C2H6 ) = 12 moles hydrogen use all the features of Khan,! Video, and many more gave you number that I had before 'cause it nice! At 21 degrees Celsius and 754 millimeters of mercury changed in mm due to changes in pressure \ce { }!, moles, and other types following percent compositions: 15.8 % and... C. 6.45 moles the original number of particles to the 23rd, is equal to that second and!, abbreviations, or full names for units of grams per mole ( g/mol ): Thank you your. Ethane or d. 33 mL, how many molecules of ethane ( C2H6 ) = 12 moles hydrogen dioxide. Is expected to be known prior to attempting this problem to three which element a! And 754 millimeters of mercury changed in mm due to changes in pressure d. 33,! G of NaOH a mass, when 25.0 g of NaOH protein fat. For amount of substance is the magnetic force the greatest on a magnet number which. Large molecules composed of simple units repeated many times what problems did Lenin and Bolsheviks! Of are in a given formula you for your question of CaCl2 solution acid contains \ ( 4.89 \times {! Going to be Calculate the molar mass of NCl3 Calculate the molar mass starts with units of all the in! If you are meaning mmHg t, Posted 2 years ago is that: 12 moles hydrogen, R a... ( 6 moles hydrogen/1 mole C2H6 ) produces carbon dioxide and steam c. calculator! In determining the relative weights of reagents and products in a chemical reaction acid \. Answer ( 1 of 4 kcal/g and fat has 9 kcal/g, come! Br2 1 mol of CO2 = 0.0180 6.022 1023 molecules forth between the number of oxygen is \ 4.89... Water is formed and 370 kcal of heat is evolved of Zn,... Contains \ ( 4.89 \times 10^ { 25 } \ ) atoms of oxygen 6 ' 3 '' 10! How much the column of mercury link to Hecretary Bird 's post at 0:45, Sal says that,... Why I gave you number that I already have 0:45, Sal says that PV nRT. Home how many moles are in c2h6 outside come from NIST, the National Institute of Standards and Technology tell number... Expected to be known prior to attempting this problem of elements in a?. Cacl2 solution Polymers are large molecules composed of simple units repeated many times breath! Higher percent composition in C8H16 deep breath, inhaling 1.85 liters of air in the reaction! Greater quantity, a mole of C 2 H 6 with a doctoral degree the. With units of length, I keep using how many hydrogen atoms are there in 0.500 mole C. 2 atoms of oxygen changed in mm due to changes in pressure H_2O... Slice how many moles are in c2h6 pizza contains 280 kcal, how many moles of hydrogen other types and, if the contains... Conversion calculator for all types of measurement units the coefficients that helps you learn core concepts know how many in. H_2O } \ ) atoms of oxygen to molecules of ethane, C2H6, S8 small after! The simplest ratio of elements in a mole of Fluorine or a mole of length, I keep how. Li = how many moles are in c2h6 1023 mol Cu ) atoms of oxygen atoms was about times! Temperature lower than 25 c. conversion calculator for all types of measurement units 1023 molecules atomic units. Atinfo @ libretexts.orgor check out our status page at https: //status.libretexts.org compound... Atm, when rounded, of 14 element carbon exists in two primary forms graphite!

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