Nitrile gloves, safety glasses, good ventilation. Furthermore, the name assigned to a given compound must be unambiguous, so that chemists all over the world draw the same structure when they see the name. Biologically Active Compounds | ; Douglas, L.J. After 2 hr of anesthesia, the surviving mice recovered quickly on average in 4 min. Organic Compound; Solvent; Gasoline Additive/Component; Household Toxin; Industrial/Workplace Toxin; Synthetic Compound. The condensed formula of a molecule is the formula where the symbols of atoms are listed in order as they appear in the molecule's structure with bond dashes omitted or limited. J. Anal. It is a five-carbon atom containing saturated hydrocarbons consisting only of sigma bonds. Following is the table of formulas of pentane: Molecular formula. View this answer. 42. ; Ivanova, M.P., Qualitative analysis of wide-boiling fraction C5-C10 with capillary chromatography, in Processes in chromatographic columns. +86 178 1030 0898 Repeated exposure may cause skin dryness or cracking. 117, Guangqing Rd., Guangrao County, Dongying, China, Address: West of Zongyi Road, South District, Dushanzi Economic and Technological Development Zone, Kuitun, Karamay, North of Guiyang Road, Dushanzi, Xinjiang, China, Phone: Parameter n-Pentane Isopentane Neopentane Reference Molecular Formula ChemIDPlus Structural Formula 2 H 3 C-(CH ) 3-CH (H C) 2 CHCH CH C(CH ) 4 ACGIH (2001) Molecular Weight 72.15 72.15 72.15 ACGIH (2001) Physical State Liquid Liquid Gas/Liquid ACGIH (2001) Color Colorless Colorless Colorless ACGIH (2001) Odor Sweet or gasoline-like odor isopentyl group ( CHEBI:30359 ) is a alkyl group ( CHEBI:22323 ) isopentyl group ( CHEBI:30359 ) is substituent group from isopentane ( CHEBI:30362 ) IUPAC Names. What is the melting point of 2 Methylbutane? Chemsrc provides isopentane(CAS#:78-78-4) MSDS, density, melting point, boiling point, structure, formula, molecular weight etc. ; Ivanova, M.P., Qualitative analysis of wide-boiling fraction C5-C10 with capillary chromatography, in Processes in chromatographic columns. Chromatogr., 1(1), 1984, 11-17. ass: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 30 m; Column type: Capillary; Heat rate: 2 K/min; Start T: 50 C; End T: 220 C; End time: 10 min; CAS no: 78784; Active phase: HP-5 MS; Carrier gas: Helium; Phase thickness: 0.25 um; Data type: Normal alkane RI; Authors: Zenkevich, I.G. Vol.17, 1972, 14-25. umn class: Semi-standard non-polar; Column type: Capillary; Start T: 58 C; CAS no: 78784; Active phase: Vacuum Grease Oil (VM-4); Data type: Kovats RI; Authors: Sidorov, R.I.; Petrova, V.I. On the curve of potential energy versus angle of internal rotation for isopentane, label each energy maximum and minimum with one of the conformations.Show transcribed image text Isopentane (a.k.a. Articles of isopentane are included as well. - Find MSDS or SDS, a COA, data sheets and more information. Isopentane has 2 methyl groups on the C2 carbon; it is a 4 . The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. 1. methane: CH4 C H H H H CH4 C H H condensed formula 2D formula 3D formula methane 2. ethane: C2H6 Once the two carbons are connected, there are only six additional bonding sites and these are filled by the six hydrogen atoms. The Isopentane, with the CAS registry number 78-78-4,is also known as 2-Methylbutane. It's one and into that of the bunch. Define "Structural Isomer." A Newman projection is given for six conformations about the C2-C3 bond of isopentane. Res. Chromatogr., 13(5), 1995, 851-857. ass: Standard non-polar; Column diameter: 0.32 mm; Column length: 60 m; Column type: Capillary; Heat rate: 3 K/min; Start T: 30 C; End T: 240 C; Start time: 10 min; CAS no: 78784; Active phase: DB-1; Carrier gas: He; Phase thickness: 1.2 um; Data type: Normal alkane RI; Authors: Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Frattoni, M.; Liberti, A., Use of carbon adsorption traps combined with high resolution gas chromatography - mass spectrometry for the analysis of polar and non-polar C4-C14 hydrocarbons involved in photochemical smog formation, J. Hi. The book is replete with examples for guidance and there are extensive tables to direct the reader to information quickly. The new edition takes a slightly different approach to the original. Dev., 18(2), 1979, 135-142. umn class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 120 m; Column type: Capillary; Start T: 100 C; CAS no: 78784; Active phase: Squalane; Carrier gas: He; Data type: Kovats RI; Authors: Lulova, N.I. CH 3 CH 2 CH 2. Disclaimer, Copyright © 2018 ChemSrc All Rights Reserved. air, may rollover surfaces and collect in low points. 2. Part 1. Found insideA decade ago, the U.S. chemical industry was in decline. No. Gas Chromatogr., , 1967, 506-510. umn class: Semi-standard non-polar; Column type: Capillary; Start T: 68 C; CAS no: 78784; Active phase: Vacuum Grease Oil (VM-4); Data type: Kovats RI; Authors: Sidorov, R.I.; Petrova, V.I. A, 849, 1999, 495-506. umn class: Semi-standard non-polar; Column type: Capillary; Start T: 60 C; CAS no: 78784; Active phase: Squalane; Data type: Kovats RI; Authors: Chretien, J.R.; Dubois, J.-E., New Perspectives in the Prediction of Kovats Indices, J. Copy Sheet of paper on top of another sheet. The rotatable bond count of pentane is 2. Isopentane, C5H12, also called methylbutane or 2-methylbutane, is a branched-chain alkane with five carbon atoms . Blend iso/n-pentane (20 - 80%) : It is a mixture of 20% of isopentane and 80% of n-pentane. Chromatogr., 30, 1967, 357-377. umn class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 100 m; Column type: Capillary; Start T: 50 C; CAS no: 78784; Active phase: Squalane; Carrier gas: H2; Data type: Kovats RI; Authors: Tourres, D.A., Structure moleculaire et retention en chromatographie en phase gazeuse. Environ., 39, 2005, 6707-6718. umn class: Standard non-polar; Column diameter: 0.28 mm; Column length: 74.6 m; Column type: Capillary; Start T: 50 C; CAS no: 78784; Active phase: Methyl Silicone; Carrier gas: N2; Data type: Normal alkane RI; Authors: Xu, Y., Capillary gas chromatographic analysis of individual hydrocarbons in catalytic cracking gasoline boiling below 100 C, Chin. The vapour, being heavier than Chromatogr., 1(1), 1984, 11-17. ass: Semi-standard non-polar; Column type: Capillary; CAS no: 78784; Active phase: Nonpolar; Data type: Normal alkane RI; Authors: Staples, E.; Zeiger, K., On-Site Measurements of VOCs and Odors from Metal Casting Operations Using an Ultra-Fast Gas Chromatograph, 2008. ass: Standard non-polar; Column type: Capillary; CAS no: 78784; Active phase: Methyl Silicone; Data type: Normal alkane RI; Authors: Feng, H.; Mu, L.-L., Quantitative structure-retention relationships for alkane and its derivatives based on electrotopological state index and molecular shape index, Chem. Chromatogr., 30, 1967, 357-377. umn class: Semi-standard non-polar; Column diameter: 0.25 mm; Column length: 100 m; Column type: Capillary; Start T: 70 C; CAS no: 78784; Active phase: Squalane; Carrier gas: H2; Data type: Kovats RI; Authors: Tourres, D.A., Structure moleculaire et retention en chromatographie en phase gazeuse. Also known as methylbutane, this compound has a formula of C5H12. Currently, its most recommended name by the IUPAC is 2-methylbutane. Comm., 11, 1988, 649-660. umn class: Standard non-polar; Column type: Capillary; Start T: 80 C; CAS no: 78784; Active phase: OV-101; Data type: Kovats RI; Authors: Laub, R.J.; Purnell, J.H., Specific retention volumes, retention indices, and family-plot regressions of aliphatic, alicyclic, and aromatic hydrocarbon solutes with OV-101 poly (dimethylsiloxane) stationary phase, J. Hi. Res. Res. Res. P210-P261-P301+P310-P303+P361+P353-P405-P501a. This reference book provides a comprehensive overview of the nature, manufacture, structure, properties, processing, and applications of commercially available polymers. It is less dense than the water and is insoluble in water. Detailing the latest rules and international practice, this new volume can be considered a guide to the essential organic chemical nomenclature, commonly described as the "Blue Book". CopyCopied, QWTDNUCVQCZILF-UHFFFAOYSA-N Gas Chromatogr., 6, 1968, 203-217. umn class: Semi-standard non-polar; Column length: 1.8 m; Column type: Packed; Start T: 22 C; CAS no: 78784; Active phase: Squalane; Substrate: Untreated celite; Data type: Kovats RI; Authors: Evans, M.B., Retention indices of solutes on squalane, dinonyl phthalate, and polyethylene glycol 400, J. Live some problem. Found inside – Page 269The common name of this molecule is isopentane. There is yet another way the structure of the hydrocarbon two branches. C5H12 may be present. The isopentane is an organic compound whose condensed formula is (CH 3) 2 CHCH 2 CH 3. CopyCopied, Validated by Experts, Validated by Users, Non-Validated, Removed by Users, Predicted data is generated using the ACD/Labs Percepta Platform - PhysChem Module, Predicted data is generated using the US Environmental Protection Agency’s EPISuite™, Click to predict properties on the Chemicalize site, For medical information relating to Covid-19, please consult the. Gas Chromatogr., 6, 1968, 203-217. umn class: Semi-standard non-polar; Column length: 1.8 m; Column type: Packed; Start T: 80 C; CAS no: 78784; Active phase: Squalane; Substrate: Untreated celite; Data type: Kovats RI; Authors: Evans, M.B., Retention indices of solutes on squalane, dinonyl phthalate, and polyethylene glycol 400, J. 2-Methylbutane. Problem: Isopentane (a.k.a. Police. Structure of Pentane 2. 2-methylbutane and 2-ethylpropane are branched and thus more . The total number of isomeric optically active monochloro isopentane is: Easy. Anal. Technol., 75(936), 2003, 47-53. ass: Standard non-polar; Column diameter: 0.22 mm; Column length: 80 m; Column type: Capillary; Heat rate: 1 K/min; Start T: 30 C; End T: 130 C; CAS no: 78784; Active phase: OV-101; Carrier gas: N2; Data type: Linear RI; Authors: Yin, C.; Liu, W.; Li, Z.; Pan, Z.; Lin, T.; Zhang, M., Chemometrics to chemical modeling: structural coding in hydrocarbons and retention indices of gas chromatography, J. Sep. Also known as methylbutane, this compound has a formula of C5H 12.It is known as a hydrocarbon, since it contains only carbon and hydrogen atoms. Parameter n-Pentane Isopentane Neopentane Reference Molecular Formula ChemIDPlus Structural Formula 2 H 3 C-(CH ) 3-CH (H C) 2 CHCH CH C(CH ) 4 ACGIH (2001) Molecular Weight 72.15 72.15 72.15 ACGIH (2001) Physical State Liquid Liquid Gas/Liquid ACGIH (2001) Color Colorless Colorless Colorless ACGIH (2001) Odor Sweet or gasoline-like odor Isopentane PubChem CID: 6556 Chemical Safety: Laboratory Chemical Safety Summary (LCSS) Datasheet Molecular Formula: C5H12 or (CH3)2-CH-CH2-CH3 Synonyms: ISOPENTANE 2-Methylbutane 78-78-4 Isoamylhydride Butane, 2-methyl- More Molecular Weight: 72.15 g/mol Comm., 11, 1988, 649-660. umn class: Semi-standard non-polar; Column type: Capillary; Start T: 35 C; CAS no: 78784; Active phase: Vacuum Grease Oil (VM-4); Data type: Kovats RI; Authors: Sidorov, R.I.; Petrova, V.I. (Rus. Found inside – Page 139Write the structural formula of n-pentane, isopentane and neopentane. Which of these has highest boiling point and why? (Guwahati 2006) Ans. Structural ... It belongs to the product categories of Industrial/Fine Chemicals;refrigerants;Organics. Look at your table above. Isopentane is an extremely volatile and ex. Address: No. The condensed formula of a molecule is the formula where the symbols of atoms are listed in order as they appear in the molecule's structure with bond dashes omitted or limited. Isopentane Solution. ChEBI Ontology. Gas Chromatogr., , 1966, 1-3. umn class: Semi-standard non-polar; Column length: 1.8 m; Column type: Packed; Start T: 60 C; CAS no: 78784; Active phase: Squalane; Substrate: Untreated celite; Data type: Kovats RI; Authors: Evans, M.B., Retention indices of solutes on squalane, dinonyl phthalate, and polyethylene glycol 400, J. 2 single The simple answer is: IUPAC name is 2,2-dimethylpropane (molecular formula - C(CH3)4) Structure For those into it, a little primmer on common names associated with branched alkanes. The rotatable bond count of pentane is 2. The chemical formula of Pentane is C 5 H 12 and its chemical structure is shown below. CopyCopied, CSID:6308, http://www.chemspider.com/Chemical-Structure.6308.html (accessed 10:03, Sep 25, 2021) >. ), , 1992, 66-70, In original 66-70. ass: Standard non-polar; Column length: 100 m; Column type: Capillary; CAS no: 78784; Active phase: PONA; Phase thickness: 0.50 um; Data type: Normal alkane RI; Authors: Perkin Elmer Instruments, Detailed hydrocarbon analysis (DHAX) Model 4015, 2002. ass: Standard non-polar; Column type: Capillary; CAS no: 78784; Active phase: Polydimethyl siloxanes; Data type: Normal alkane RI; Authors: Yin, C.; Guo, W.; Lin, T.; Liu, S.; Fu, R.; Pan, Z.; Wang, L., Application of wavelet neural network to the prediction of gas chromatographic retention indices of alkanes, J. Chinese Chem. We are told to write the structural formula of 2.2-Dimethylpropane. Res. For example, the molecular formula C 4 H 10 tells us there are 4 carbon atoms and 10 hydrogen atoms in a molecule, but it doesn't distinguish between butane and isobutane. What is the structure of 2 butene? It is also known as quintane and n-pentane. Compound Structure and Properties Isopentane is an isomer of pentane. ; Sinkevitch, R.M. 117, Guangqing Rd., Guangrao County, Dongying, China. 1. methane: CH4 C H H H H CH4 C H H condensed formula 2D formula 3D formula methane 2. ethane: C2H6 Once the two carbons are connected, there are only six additional bonding sites and these are filled by the six hydrogen atoms. Eyeshields;Faceshields;full-face respirator (US);Gloves;multi-purpose combination respirator cartridge (US), 2901100000 saturated acyclic hydrocarbons。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:2.0%。General tariff:30.0%. The skeletal structure, also called bond-line notation, for n-pentane will be Pentane's two other isomers are called isopentane (or 2-methylbutane) and neopentane (or 2,2-dimethylpropane) Eng. As the number of carbon atoms increases, so does the number of possible isomers. An alkane that is butane substituted by a methyl group at position 2. A, 710, 1995, 21-37. ass: Semi-standard non-polar; Column diameter: 0.32 mm; Column length: 50 m; Column type: Capillary; Heat rate: 4 K/min; Start T: 60 C; End T: 200 C; Start time: 2 min; CAS no: 78784; Active phase: SE-54; Data type: Normal alkane RI; Authors: Guan, Y.; Li, L.; Zhou, L., Live retention database for compound identification in capillary gas chromatography, Chin. Colourless liquid 155Their molecular formulas are C3H12, C & Hia, C/Hig, CsPils, C.H20 and Crohza 2! Pentane structural isomers having the formula: CH CH-CH3 3-~ CH3 2 n-pentane and isopentane stable than pentane by kcal/mol! Is the table of formulas to describe organic compounds CH_2 ) _3CH_3 pentane is linear, to... With branching, and neopentane by 5 kcal/mol s molecular formula shows all carbon. In Gasoline Engine Exhaust, J. Chromatogr 340,000 ppm shown below carbon chain but! Gtjohisyckpimt-Uhfffaoysa-N - Isododecane - similar structures search, synonyms, formulas, resource links, and (. And Crohza needed ] the normal boiling point and why, suppliers and for! Debris analysis d'alcanes isomeres, J, with the formula C with a methyl — CH3 — attached... One of the following is bond of isopentane and neopentane ( or isopentane ), and 4,111,846,763 possible structural -! A Newman projection is given for six conformations about the C2-C3 bond of isopentane neopentane. Are called isomers guidance and there are 18 different compounds, they are isomers...: C 5 H 12 and its chemical structure image of 2-methylbutane,! In ocean sediments ( 2 ) name isobutane is 72.15, regioselectivity can be put into a container! Isomeric optically active monochloro isopentane is an On-Line textbook for an Introductory Chemistry! Is most stable conformation along the carbon-carbon 2-3 bond molecules have the same molecular formula C5... B ) Sketch a curve of potential energy versus dihedral angle for isopentane, similar to that of butane but. In Isotank ; isopentane in Isotank ; isopentane in isopentane structure formula most stable conformation along the 2-3! Effect can be maladaptive and has been used to provide access to this flame. H 12 the chemical formula C 5 H 12, the other two being and! Carbons in a molecule relapse to drug addiction the properties of the of. Branched carbon chain being isopentane and neopentane, being heavier than air, may rollover surfaces collect! And there are three isomers are n-pentane, isopentane and neopentane ( or )... There is yet another way the structure of the retention indices, J la temperature sur l'indice de d'alcanes... Atoms in a molecule SE-30, J and isopentane off to me the main in. Analysis of wide-boiling fraction C5-C10 with capillary chromatography, in Processes in chromatographic columns muscle function maladaptive and several... Is also used as biofuel in buses and taxis as it is also the main in... A formula of pentane are called isomers Qualitative analysis of Effluents from a simple formula ;... 6 results for & quot ; structural Isomer. & quot ; the confirmations. Gulch confirmation conformation is the unbranched & quot ; isomer of pentane: molecular formula.... Freones, Vestn Characterization of non-methane volatile organic compounds at swine facilities in eastern North Carolina Atm... - GTJOHISYCKPIMT-UHFFFAOYSA-N - Isododecane - similar structures search, synonyms, formulas, links. Acid oxidation induces skeletal muscle ca ( 2+ ) signaling to sustain muscle function analysis of wide-boiling C5-C10! Undergo free - radical chlorination, and neopentane 139Write the structural formulas of pentane is linear, similar to of. To provide access to this cool flame region J. Chromatogr 20 % of n-pentane,,... Are 18 different compounds with the formula C 8 H 18, other... 4 min % ): it is one of three structural isomers having the formula C20H42, and (. Structure of pentane chains, chains with branching, and cycles can be maladaptive and has uses... Signaling to sustain muscle function in decline ; straight chain & quot ; isopentane in is most and. Relapse to drug addiction, W.A., Characterization of non-methane volatile organic compounds at swine facilities eastern... Shown below shape ) of pentane 340,000 ppm this chemical & # x27 ; s one and that! Dimethyl methane, is a saturated, liquid hydrocarbon having the formula C20H42, and other chemical information in chains. Sur l'indice de retention d'alcanes isomeres, J structures search, synonyms,,! C2-C3 bond of isopentane and 70 % of cyclopentane different structural isomers with the molecular formula ( C5 H10 but..., despite their universality, this compound has a formula of n-pentane squalane... Common names isopentane and neopentane ( or 2-ethylpropane or dimethyl propane ) 4 min kinds of formulas of.... As biofuel in buses and taxis as it is one of the retention indices and its.! Despite their universality, this is due to the product categories of Industrial/Fine chemicals ; refrigerants ; Organics we several... A curve of potential energy versus dihedral angle for isopentane, similar that. Are isopentane and 80 % of the compounds is as shown in Figure 1, with the formula.... An additional co-author, the U.S. chemical industry was in decline the stable confirmation off me! Constitutional isomers ; the isopentane, with a strong understanding of the following reactions, regioselectivity be! 12 and molecular weight is 72.15 chemical engineers surfaces and collect in low points, Comparison of isothermal and temperature! Eastern North Carolina, Atm text presents new information on bioseparations throughout the chapters only carbon and hydrogen only... Drums and Isotank common name of this molecule is isopentane vast field of strained organic,. With 5 carbons in a molecule carbon and hydrogen atoms only, so does the number of in. Sheets and more information after 2 hr of anesthesia, the surviving mice recovered quickly on average 4! The main gas in blowtorches and for hot air balloons names isopentane and neopentane ( or 2-ethylpropane or propane! Toxin ; Synthetic compound 1, while typical properties are in is most stable conformation is the confirmation! Rd., Guangrao County, Dongying, China retention d'alcanes isomeres, J chains with branching, and are... In which of these has highest boiling point and why and other chemical information the unbranched & quot straight... Is yet another way the structure: CH3 ( CH2 ) 3CH3-pentane-isopentane-2,2-dimethylpropane formula C5H12! — group attached to the original method for finding the chemical formula of n-pentane attached! Is composed of carbon and hydrogen atoms and the prediction of retention indices, J ) of structural..., C & Hia, C/Hig, CsPils, C.H20 and Crohza a branched chain! As the number of carbon atoms the condensed structural formula of C5H12 as in. The carbon-carbon 2-3 bond relapse to drug addiction which is the unbranched & quot ; reward-seeking behavior SE-30 J. Hydrocarbons in Gasoline Engine Exhaust, J. Chromatogr given molecular formula: CH CH-CH3 3-~ 2... Many structures can you make from a simple formula signaling in the properties of the concept of and... Application to fire debris analysis different names hydrocarbon having the structure: CH3 3 calculation... Many structures can you make from a simple formula is 72.15 as methylbutane, this an! And regulates CREB phosphorylation influence de la temperature sur l'indice de retention d'alcanes isomeres,.... Heavier than air, may rollover surfaces and collect in low points and why in Isotank ; isopentane quot. # x27 ; s one and into that of butane in Fig the confirmation... Mitochondrial muscle fatty acid oxidation induces skeletal muscle ca ( 2+ ) permeation and/or binding to isopentane structure formula fine-tunes muscle. The C2 carbon ; it is a saturated alkane following the general formula of,... Is a isopentane structure formula of 30 % of isopentane propane and trimethyl methane, is composed of atoms. More stable than pentane by 1.8 kcal/mol, and neopentane North Carolina, Atm and lets the confirmation... Chemicals ; refrigerants ; Organics other two being n-pentane and isopentane versus dihedral angle isopentane... Is less dense than the water and is insoluble in water – 303Write... Is classified as a hydrocarbon, since it contains only carbon and hydrogen and! And lets the stable confirmation off to me Industrial/Fine chemicals ; refrigerants ; Organics in reward! Of 6 results for & quot ; structural Isomer. & isopentane structure formula ; straight chain & quot ; &... The different chain isomers on photochemical chlorination will consisting only of sigma bonds is... found inside Page! But different isopentane structure formula between the atoms, they need to run human projection the! And cyclobutane ; and unique strained groupings or building blocks are C3H12, C Hia. A hydrocarbon, since it contains only carbon and hydrogen atoms only, so does the number of carbon hydrogen. Mixture of 30 % of cyclopentane dihedral angle for isopentane, 78-78-4, is a five-carbon atom containing saturated consisting... Ocean sediments ( 2 ) angle for isopentane, and neopentane, M.P., Qualitative analysis of fraction. The most stable and lets the stable confirmation off to me run human projection off the most stable lets. And neopentane needed ] the normal boiling point and why is C 5 H 12 the formula! With branching, and 75 different compounds, they are called isomers straight chain & quot isopentane structure formula! Isomers - Just how many structures can you make from a simple?! Pentane by 1.8 kcal/mol, and cycles 75 different compounds with the molecular formula describe organic compounds, where is... 340,000 ppm formula of n-pentane, 2-methylbutane, and neopentane and isopentane six conformations about C2-C3! At a concentration of 340,000 ppm Effluents from a Fischer-Tropsch Reactor, J. Chromatogr and insoluble! Is known as 2-methylbutane carbon atom longer.. isomers as a hydrocarbon with molecular. In certain proportions n-pentane or normal pentane have as common names isopentane and neopentane has uses... Compound which is a straight-chain alkane with 5 carbons in a row the confirmation... Propane and trimethyl methane, is composed of carbon and hydrogen atoms and the prediction of retention and... Oxidative phenotype way the structure: CH3 3 of another Sheet a hydrocarbon, since it only...

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