Friday
April 18, 2014

Search: ethane

Number of results: 199

Chemistry
What is the H of CF4 (carbon tetraflouride)? What is the H of HF (hydrogen flouride)? Lastly, what is the H of C2H4 (ethane gas)? Please help.
Saturday, April 21, 2012 at 4:49pm by Mary

Chemisty
Hydrocarbons are important fuel that we burn for many different reasons. a. what is a hydrocarbon? b. rank these hydrocarbons by the number of carbons the contain: propane, methane, butane, octane, ethane.
Tuesday, March 11, 2014 at 11:51pm by Jaclyn

College Chem I
Based on the types of bonding in the following compunds, explain why you would expect: 1) calcium chloride (CaCl2) to be soluble in water 2) Ethane (CH3CH3) to be insoluble in water
Monday, May 2, 2011 at 6:11pm by James

science chemistry
The general formula for alkanes is CnH(2n+2) n=1 methane (CH4) n=2 ethane (C2H6) and so on to C100H202 or hectane I don't understand what is meant by "enumerate the 100 alkanes"
Monday, October 31, 2011 at 11:42pm by Dr Russ

CHEMISTRY
The pKa values of acetylene, ehtylene and ethane are 25, 44 and 50 respectively. This means that acetylene is the strongest acid of the three.Explain the order of acidity for the above hydrocarbons
Sunday, November 4, 2007 at 12:54pm by Delli

chemistry
explain what is meant by the term 'Hybridisation' in molecular orbital theory and show how the concept can be used to explain the structure and bonding in ethane C2H6 ETHENE C2H4 AND ETHYNE C2H2
Tuesday, December 13, 2011 at 8:18am by rebecca

chemistry
I can't name this without knowing the structural formula (the Cl, H, Br, & F may go on different carbon) and we can't draw structural formulas on this forum. It is a chloro, fluoro, bromo, ethane. Which one I don't know.
Wednesday, August 21, 2013 at 3:20pm by DrBob222

Chemistry
You will need to know delta H for the combusion of CH4 and delta H for the combustion of C2H6. Then take 80% of 1 g for methane and 20% of 1 g for ethane and calculate delta H for each of the gases. Then add them together.
Thursday, November 1, 2007 at 5:38pm by DrBob222

Chemistry
Rank from highest to lowest melting point of the following molecules: ethane, 2-butane, trans-2-butane, and cis-2-butane. please explain how you come to your answer.
Thursday, June 5, 2008 at 1:47pm by Jennifer

Chemistry
Use the data from this table of thermodynamic properties to calculate the maximum amount of work that can be obtained from the combustion of 1.00 moles of ethane, CH3CH3(g), at 25 C and standard conditions. I absolutely have no idea what to do, please help me!
Tuesday, April 30, 2013 at 7:38pm by Dee

Chemistry
So, for methane, would it be 5.16 atm; ethane 1.13 atm; neon 4.65 atm; giving a total pressure of 10.94 atm?
Wednesday, December 23, 2009 at 9:14pm by Anonymous

chem
Ptotal = 1.45 = pAr + pethane You know Ptotal and pAr, calculate p ethane.
Thursday, October 24, 2013 at 6:21pm by DrBob222

CHEMISTRY
24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.
Tuesday, October 23, 2012 at 5:41pm by LC

physics
If 842 J of heat is needed to increase the temperature of ethane gas (C2H6) in a 15 litre container from 237 K to 400 K, how much gas is in the container
Thursday, November 18, 2010 at 3:38pm by serena

CHEMISTRY: URGENT
24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.
Tuesday, October 23, 2012 at 11:53pm by LC

Chemistry
The combustion of how many moles of ethane would be required to heat 838 grams of water from 25.0 to 93.0 degrees C? Assume liquid water is formed during the combustion.
Friday, November 2, 2012 at 6:42pm by k

Chemistry
Google freezing point, ethane freezing point, methane
Wednesday, May 18, 2011 at 2:11pm by bobpursley

chemistry
A sample of natural gas is 85.2% methane, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this gas mixture at 18.0C and 771 mmHg? Assume ideal gas behavior.
Wednesday, October 31, 2012 at 5:36pm by Zoe

CHEMISTRY: URGENT
If yes...Here it is... 24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.
Monday, October 29, 2012 at 10:48pm by LC

Chemistry
Write a balanced equation for the combustion of gaseous ethane (C2H6) a minority component of natural gas, in which it combines with gaseous oxygen to form gaseous carbon dioxide and gaseous water.
Tuesday, November 6, 2012 at 10:02am by Christine

Chemistry
If given: A 1.4470g sample of an oxide of gold was reduced with ethane to 1.2900g of gold metal. What is the simple formula of the original gold oxide?
Tuesday, September 18, 2007 at 11:24pm by Cat

Chemistry
If 5.27 mol of ethane (C2H6) undergo combus-tion according to the unbalanced equation C2H6 + O2 −! CO2 + H2O, how much oxygen is required? Answer in units of mol. Thanks!
Monday, January 18, 2010 at 9:36pm by Randy

Physical Chemistry
A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior
Wednesday, September 12, 2012 at 4:37pm by Dia B

chemisrty
Will 1,1,2, trichloro ethane rotate polarized light if it is cooled to low temperature and trapped in its lowest energy position? Yes, under all circumstances. Yes, but only if it is chiral. No, it will never rotate light. No, there is a racemic mixture present.
Saturday, June 1, 2013 at 12:45am by Anonymous

Chemistry
a sample of natural gas is 85.2% methan, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this mixture @ 18C and 748mmHg. so i know that i have to use this formula d=(PM)/(RT) but i dont know how to convert the percentages into g/mol (molecular weight) can someone ...
Thursday, August 4, 2011 at 6:39pm by Henry

Chemistry
1. Write the equation and balance it. 2. Using the coefficients in the balanced equation, convert 5.27 moles ethane to moles oxygen. The arrow is made by ==> or --> Post your work if you get stuck.
Monday, January 18, 2010 at 9:36pm by DrBob222

chemistry
Three gases (8.00 of methane, , 18.0 of ethane, , and an unknown amount of propane, ) were added to the same 10.0- container. At 23.0 , the total pressure in the container is 3.50 . Calculate the partial pressure of each gas in the container.
Wednesday, May 5, 2010 at 5:23am by emmanuel

Chemistry
Three gases (8.00 of methane, , 18.0 of ethane, , and an unknown amount of propane, ) were added to the same 10.0- container. At 23.0 , the total pressure in the container is 3.90 . Calculate the partial pressure of each gas in the container.
Monday, August 2, 2010 at 11:36am by Stephen

chem-- delta H
Write and balance each combustion equation; i.e., CH4 + 2O2 ==> CO2 + 2H2O Then dHrxn = (n*dHf products) - (n*dHf reactants). Ethane and ethanol are done the same way. You can find delta Hf values in your text or notes.
Wednesday, October 23, 2013 at 9:25pm by DrBob222

chemistry
Three gases (8.00 of methane, 18.0 of ethane, and an unknown amount of propane, were added to the same 10.0-L container. At 23.0 C , the total pressure in the container is 3.60 atm. Calculate the partial pressure of each gas in the container.
Saturday, November 20, 2010 at 7:52pm by Jamie

Sepration chemistry
Mixture of A,B,C if the mole fraction of A is 30 and B is 35 Volume percent calculate the mass and mole fraction of each compnant. given that A is methane, B is ethane, C is propane. use SI unit and English unit.
Monday, September 16, 2013 at 11:33am by NONO

chemistry
A 1-L flask is filled with 1.25g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.45amt .What is the partial pressure of argon, Par, in the flask?
Saturday, October 3, 2009 at 7:45pm by Monica

chemistry
A 1-L flask is filled with 1.45 g of argon at 25 degrees C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35 atm. What is the partial pressure of argon in the flask?
Thursday, December 2, 2010 at 9:45pm by Liz

chemistry
Use PV = nRT to calculate the pressure of Ar in the flask at the beginning. Then total pressure = partial pressure Ar + partial pressure ethane.
Monday, March 1, 2010 at 6:44pm by DrBob222

Chemistry
Three gases (8.00 of methane,CH4 , 18.0 of ethane,C2H6 , and an unknown amount of propane,C3H8 ) were added to the same 10.0-L container. At 23.0 degress celsius , the total pressure in the container is 3.90 atm. Calculate the partial pressure of each gas in the container.
Tuesday, September 23, 2008 at 1:28am by Sarah

chemistry
when a 8.77g mixture of methane, and ethane is burned in oxygen at constant pressure, 476.6kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3kJ/mol and -1569.7kJ/mol, respectively.
Monday, November 22, 2010 at 10:56pm by Anonymous

chemistry
The simplest formula. For example, C2H6 is the molecular formula for ethane but thre empirical formula is CH3. CH2O is the empirical formula but the molecular formula could be C6H12O6.
Monday, September 5, 2011 at 11:50pm by DrBob222

chem-- delta H
In your search for fuel to use after the reserves of gasoline dry up, you decided to analyze different compounds (2 hydrocarbons & an alcohol) by combustion. You independently combust methane (CH4), ethane (CH3CH3), and ethanol (CH3CH2OH) at 298 K and 1 atm. What is teh delta ...
Wednesday, October 23, 2013 at 9:25pm by Emma

Chemistry
How many moles of hydrogen gas are required to react completely with 807 L of ethylene (C2H4) according to the following reaction at 0oC and 1 atm? hydrogen (g) + ethylene (C2H4) (g)---> ethane (C2H6) (g) Should I use the ideal gas law here?
Wednesday, April 25, 2012 at 9:00pm by Mohamed

Chemistry
A 1L flask is filled with 1.25 g of argon at 25 degrees celcium. A sample of ethane vapor is added to the same flask until the total pressure is 1.45 atm. What is the partial pressure of argon in the flask?
Tuesday, October 5, 2010 at 8:30pm by Karen

chemistry
a mixture of methane and ethane is stored in a container at 294 mmHg. The gases are burned in air to form co2 and h2o. if the pressure of co2 is 357 mmhg measured at the same temperature and volume as the original mixture, calculate the mole fraction of the gases.
Saturday, December 4, 2010 at 3:37am by maggie

Chemistry
A mixture of ethane and ethene occupied 35.5 L at 1.000 bar and 405 K. This mixture reacted completely with 110.3 g of O2 to produce CO2 and H2O. What was the composition of the original mixture? Assume ideal gas behavior Im pretty sure i use dalton's law of partial pressures ...
Wednesday, September 19, 2012 at 9:07pm by Drew

CHEMISTRY: URGENT
Yes, that's the one. Thanks. I just wanted to see exactly how it was worded. I assume that answer was right BECAUSE the KOH dissolved all of the CO2 so decreasing by 32 meant that was the amount of CO2 generated. This problem is a little different since we don't know how much ...
Monday, October 29, 2012 at 10:48pm by DrBob222

chemistry
What is the major difference between the two-dimensional and three- dimensional models of ethane and methane? When might you choose to use a two-dimensional model rather than a three-dimensional model when representing one of the molecules?
Monday, September 30, 2013 at 1:56pm by Jessica

CHEM
a mixture of 10cm3 of methane and 10cm3 of enthane was sparked with an excess of oxygen. after coolin to room temp, the residual gas was passed thru aq KOH. what volume of gas was absorbed by the alkali ? Write the equations for CH4 + O2 and C2H6 + O2. Balance them. Look to ...
Tuesday, May 29, 2007 at 1:09pm by Pet

Chemistry
What is the partial pressure (in mm Hg) of neon in a 4.00 L vessel that contains 0.442 mol of methane, 0.414 mol of ethane, and 0.859 mol of neon at a total pressure of 943 mm Hg?
Thursday, April 22, 2010 at 9:41am by Camarra

chem
The information I can find speaks volumes about the formation of an alkyl halide from an alkane (such as chloretnane from ethane) but nothing is said about the addition of a second chlorine to make dichloroethane, or if it does add a second Cl atom, why it would go to a ...
Thursday, March 12, 2009 at 9:34pm by DrBob222

oops--Sepration chemistry
I just mislabeled the final results. grams = 0.30*molar mass CH4. grams = 0.35*molar mass ethane grams = 0.35*molar mass propane.
Monday, September 16, 2013 at 11:33am by DrBob222

Chemistry
OK. I misunderstood about the H atoms. You have CH3CH3 which makes it an alkane, specifically, ethane. Unless they have changed the rules about functional groups (and when I see the IUPAC rules nowdays, that may be possible), I don't see how ketones, aldehydes, carboxylic ...
Monday, May 3, 2010 at 12:12pm by DrBob222

Chemistry
a mixture of methane CH4 and ethane C2H6 is stored in a container at 294 mmHg. The gases are burned in air to form CO2 and H2O. If the pressure of CO2 is 346mmHg at the same temp and volume as the original mixture, calculate the ratio of moles of CO2 produced to moles of the ...
Tuesday, March 29, 2011 at 10:38pm by Carolyn

Chemistry
a mixture of methane CH4 and ethane C2H6 is stored in a container at 294 mmHg. The gases are burned in air to form CO2 and H2O. If the pressure of CO2 is 346mmHg at the same temp and volume as the original mixture, calculate the ratio of moles of CO2 produced to moles of the ...
Tuesday, March 29, 2011 at 10:40pm by Carolyn

Chemistry
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting, how much heat is ...
Friday, October 22, 2010 at 9:29pm by HELP !

CHEMISTRY
A 8.90-g sample of ethane, C2H6, is mixed with 18.8 atm of O2 (an excess) in a 1.50 L combustion chamber at 130.0C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 130.0C. What is the final pressure in the combustion chamber assuming the ...
Thursday, January 17, 2008 at 8:04pm by Matt

Chemistry
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting, how much heat is ...
Tuesday, October 19, 2010 at 11:52pm by Jo

chemistry
When a 6.79-g mixture of methane, CH4, and ethane, C2H6, is burned in oxygen at constant pressure, 369 kJ of heat is liberated. What is the percentage by mass of CH4 in the mixture? The standard enthalpies of combustion for CH4 and C2H6 are -890.3 kJ mol-1 and -1569.7 kJ mol-1...
Saturday, March 1, 2014 at 6:26pm by abby

Chem ques.
The polarity would depend usually if there is a electronegative atom. If there is like in water for example where the oxygen is electronegative then the molecule would become polar. If it is a molecule like ethane then the molecule will be non polar since there are no ...
Sunday, November 25, 2007 at 6:22pm by ~christina~

chem 211
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 144 kJ is given off per mole of C2H4 reacting, how much heat is ...
Friday, October 18, 2013 at 11:27am by beti

chemistry
Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions in brackets (where known) and products. sorry i know this question has been posted already, but i need help. could you explain to me how to do them...
Friday, May 2, 2008 at 1:26pm by John

chemistry
Partial pressure is divided according to mole ratio. Figure out the moles of each, than add to get total moles. pressuremethane= molesmethane/totalmoles * total pressure pressurethane= moleethane/totalmoles * total pressure and so on. until you get the ones you know. then ...
Wednesday, May 5, 2010 at 5:23am by bobpursley

chemistry
For the combustion of ethane, beginning with 2.6 mol of CH3CH3, 2CH3CH3(g) + 7O2(g) → 4CO2(g) + 6H2O(g) a. how many moles of O2 are required to completely consume the CH3CH3? 9.1 moles b. how many moles of CO2 are obtained when the CH3CH3 is completely combusted? 5.2 ...
Monday, February 13, 2012 at 2:10pm by krystal

chemistry
possible answer choices: A. ethane (C2H6 change in Hf= -84.68kj/mol B. ethylene (C2H4 change in Hf= 52.47kj/mol C. acetylene (C2H2 change in Hf= 226.73 kj/mol D. propane (C3H8 change in Hf= -104.7kj/mol E. propylene (C3H6 change in Hf= 20.41 kj/mol
Monday, June 21, 2010 at 11:14am by Anonymous

Chemistry
You didn't provide the moles of ethane. The un-named reactant is oxygen. For the second part, here is an example. Just follow the steps. http://www.jiskha.com/science/chemistry/stoichiometry.html
Monday, May 9, 2011 at 1:01pm by DrBob222

science/ chemistry
Ethane (C2H6) is one of the many products of combustion of iso-octane, an important component of petrol. After release into the atmosphere, it is attacked by the hydroxyl radical, HO, leading to its oxidation in the cycle of reactions when in a NOx-rich environment. Assuming ...
Sunday, September 14, 2008 at 4:35pm by Nicolas

Chemistry 30
In addition to alkanes, cracking reactions may also involve alkenes, alkynes and aromatics. For each of the following reactions, draw a structural formula equation. Include all reactants and products: a) but-1-ene --> ethyne + ethane b) 3-methylheptane --> but-2-ene + ...
Wednesday, January 2, 2013 at 11:50pm by Iris

chem/plz/check work studying for a final
what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L
Thursday, December 16, 2010 at 10:15am by julia

chem/plz/check work studying for a final
what is the volume occupied by 16.0g ethane gas (C2H6) at 720 Torr and 18C? V=nRT/P conversion of mol: 16.0g C2H6 X 1mol C2H6/30.07g C2H6= .53mol C2H6 V= .53 mol(0.0821 L*atm/mol*K)(291)K / 720 Torr (1 atm/760Torr) V= 13.5 L
Thursday, December 16, 2010 at 7:46pm by julia

chemistry
The formulas for ethane, ethene and ethyne are C2H6, C2H4, and C2H2 respectively. Rank this chemicals 1,2,3 (highest)in terms of strength of IMF and explain the structures of the three molecules. I rank these three based on the bond length so I got C2H2, C2H4, C2H6. I know the...
Friday, October 5, 2012 at 12:32am by Lea

Chemistry
Given the reaction 2C2H6 + 7O2 → 4CO2 + 6H2O ∆H = -1416 kJ/mol C2H6 a. How many liters of Carbon Dioxide would be produced if 16.00 L of ethane, (C2H6), were burnt (all at STP)? b. How many liters of water vapor would also be produced? c. How many liters of Oxygen ...
Sunday, December 16, 2012 at 12:18am by Shenette

college chemistry
I would balance the equation: C2H4+3O2 >> 2CO2 + 2H2O So it looks to me as if you did not have enough oxygen, which means, only 2/3 of the ethane was consumed. So you have an issue, as molecules only occur in whole number. I see 4 molecules C2H4 ; six consumed 2 ...
Thursday, July 12, 2012 at 3:29pm by bobpursley

chemistry
what are some examples of covalent bonds and what are some examples of ionic bonds? Electrons are shared in covalent bonds. Electrons are exchanged in ionic bonds. Typical ionic compounds are NaCl, MgCl2, LiI, etc. Typical covalent compounds are CH4, methane; C2H6, ethane; ...
Monday, January 29, 2007 at 7:26pm by Leeann

CHEMISTRY
The triple bond of acetylene makes the C atom slightly negative and H slightly positive and the polar bond acts as an acid, although a weak one. Ethylene works the same way but the C atom is less negative, the bond is less polar, and the acidity of ethylene is less than that ...
Sunday, November 4, 2007 at 12:54pm by DrBob222

Chemistry
Look at the carbon atoms and what is attached to them. If they have a double bond they are sp2 hybridized. For example, H3C-CH3(ethane) has two C atoms each with sp3 hybridization. But H2C=CH2 (ethene)has sp2 hybridization for each C atom. H3C-CH2=CH2 has the left most C atom ...
Sunday, January 27, 2008 at 5:57pm by DrBob222

Chem
formation enthalpy of ethane -> 83.8 kJ/mol formation enthalpy of water -> −291.83 kJ/mol formation enthalpy of ethanol -> 277.7 kJ/mol I got 97.93 and got it wrong I only have one try left. I dont know whats wrong.
Thursday, November 4, 2010 at 2:55pm by Lisa

Chemistry
A mixture of methane (CH4) and ethane (C2H6) of mass 13.43g is completely burned in oxygen. If the total mass of CO2 and H2O produced is 64.84 g, calculate the fraction of CH4 in the mixture. CH4 + C2H6 arrow CO2 + H2O 13.43g 64.84g Would I do 13.43g/16.04g CH4 ?
Friday, August 27, 2010 at 8:14pm by Amy~

ap chemistry
what does H2 + CH2 form? (what product?) What is CH2? There is a (CH)2 but I don't know of a CH2. Yes, I meant to ask: What product is formed by this reaction: H2 + (CH)2 My original answer is gone but I will repost. (CH)2 is HCtriplebondCH which is acetylene. H2 gas adds ...
Sunday, October 29, 2006 at 5:57pm by sara

Chem
Superscript 15 How many moles of Pb is 9.3 X 1015 atoms of pb? 1 mol of Pb atoms will contain 6.02 x 10^23 atoms of Pb. So 9.3 x 10^15 atoms x (1 mol/6.02 x 10^23 atoms) = ? note how the unit "atoms" cancel leaving mol and that is the unit we want. thanks What is the molar ...
Tuesday, February 6, 2007 at 3:28pm by Chris

Sepration chemistry
Xa = 0.30 Xb = 0.35 Xc = 1.0-0.3-0.35 = 0.35 Then Xa = 0.30*molar mass CH4 Xb = 0.35*molar mass ethane Xc = 0.35* molar mass propane.
Monday, September 16, 2013 at 11:33am by DrBob222

chemistry
A 79.9-L sample of a gaseous hydrocarbon, measured at 1.00 atm pressure and 25.0C, is burned in excess oxygen, liberating 4.24 10^3 kJ of heat at constant pressure. What is the identity of the hydrocarbon? (R = 0.0821 L atm/(K mol)) Substance Hf (kJ/mol) CO2(g) 393.5 ...
Wednesday, March 30, 2011 at 12:09am by chemistry

Chemistry
You can take a short cut when dealing with all gases. The short cut is that you can deal directly with volume and not convert to mols. But to complicate matters this is a limiting reagent problem. First convert L ethane to L CO2. L CO2 = 15.9 L C2H6 x ( 4 mols CO2/2 mols C2H6...
Tuesday, November 6, 2012 at 2:04pm by DrBob222

Chemistry
OK. You are correct that moles = grams/molar mass AND atomic mass in grams/6.022 x 10^23 = mass of one atom. # molecules in 0.334 g ethane. Convert to moles. moles = grams/molar mass. 0.334/30 = ?? I estimated the 30; you need to confirm it and change if appropriate. We know 1...
Saturday, July 3, 2010 at 2:55pm by DrBob222

Chemistry
Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is: C2H2(g) + 2H2(g) === C2H6(g) Given the following, what is the Kp for the reaction? C2H2(g): 209.2 ΔG˚f (kJ/mol) H2(g): 0 ΔG˚f (kJ/mol) C2H6(g): -32.89...
Sunday, March 31, 2013 at 3:26pm by Ezra

CHEMISTRY
Write the equation and balance it. Convert 8.9 g C2H6 to mols. Convert 18.8 atm oxygen @ 130.0 C to mols using PV=nRT. Determine the limiting reagent. I THINK it is oxygen which means all of the oxygen will be used, there will be some ethane unreacted. Check me out on this. ...
Thursday, January 17, 2008 at 8:04pm by DrBob222

science
Check all this work. Check my thinking. C3H8 + 5O2 ==> 3CO2 + 4H2O 2C2H6 + 7O2 ==> 4CO2 + 6H2O Ratio propane is 1 mol C3H8 to 3 mols CO2. Ratio ethane is 1 mol C2H6 to 2 mols CO2. The total mols CO2 produced is 5 mols; therefore, 3/5 x total mols = mols CO2 from C3H8 and...
Monday, October 6, 2008 at 11:14pm by DrBob222

Chemistry
As I read it, the question provides you with a word description of the production of diesel fuel, gasoline, lighter gases such as ethane and propane, as well as some of the refinery operations such as cracking. Your job is to take this word description and write an equation ...
Monday, April 30, 2007 at 12:22pm by DrBob222

Chemistry
1.) How many grams of 2-propanol are expected from the complete reaction of 672 g of propene? 2.)How many moles of propane are expected from the complete reaction of 82.8 g of propene? 3.)How many grams of propane are expected from the complete reaction of 101 g of propene? 4...
Thursday, April 5, 2007 at 12:26am by Kira

Chemistry
Hi, this is a reply to the question I asked earlier. I asked about the classification and functional group of an organic compound. It has bonds between H-C-C-H. Off of each Carbon is single bonds of Hydrogen above and below. making a total of 6 Hydrogens and two carbons. They ...
Monday, May 3, 2010 at 12:12pm by Julia

Chemistry Urgent
1) 30cm3 of methane and ethane mixed with 100cm3 of O2 at RTP. Explosion occurs, on cooling 61.5cm3 remained. Find the percentage by volume of each gas in the mixture 2)32cm3 of a mix of CO2, CH4 and H2 mix with 50cm3 of O2 and exploded after cooling to RTP, volume noted is ...
Monday, February 10, 2014 at 1:47pm by Ava

science
How many times did Earth orbit the sun between 140 CE and 1543 , how do you figure this up???? If you know how many years that is, the earth orbits the sun once a year. I hope this helps. Thanks for asking. How many years is 140 Ce to 1543 ?? We need to know 10 different kinds...
Tuesday, September 5, 2006 at 8:18pm by Charlotte

College Chemistry
1. What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it? 2. A 30.5 g sample of an alloy at 94.0C is placed into 48.7 g water at 20.3C in an insulated coffee cup. The heat capacity ...
Wednesday, October 20, 2010 at 6:00pm by Nevaeh

Chem Help!
I really need help for my homework on how to write the balanced equation for the following reactions. 1) Sodium reacts with iron(lll)oxide to produce sodium oxide and iron. Type of reaction: Balanced Equation: 2) Hydrogen bromide forms from hydrogen and bromine. Type of ...
Tuesday, April 8, 2008 at 5:49pm by Lisa

Chemistry
Elements: Look at the periodic table to see where these are located. Hydrogen Nitrogen oxygen Fluroine Chlorine rare gases (He, Ne, Ar, Kr, Xe, Rn) but these are rarely produced in CHEMICAL reactions. common compounds: ammonia, NH3 carbon dioxide, CO2 carbon monoxide, CO ...
Wednesday, January 23, 2008 at 12:52pm by DrBob222

Chemistry
I have realized I don't understand Avagado's number at all My book shows me this diagram instead of just providing a simple formulas that makes no sense at all here is what I have made sense of so far (6.022 x 10^23 atoms/mol)(mass of element) = molecular mass were molecular ...
Saturday, July 3, 2010 at 2:55pm by Kate

Chemistry
use the table below to calculate ΔHo reaction: Standard Enthalpies of Formation, ΔH˚fٍ at 298 K Substance - Formula - ΔH˚(kj/mol) Acetylene C2H2(g) 226.7 Ammonia NH3(g) -46.19 Benzene C6H6(l) 49.04 Calcium Carbonate CaCO2(s) -1027.1 Calcium ...
Friday, February 8, 2008 at 7:28pm by Sam

AP Chem
use simple structure and bonding models to account for each of the following: A. the bond length between the two carbon atoms is shorter in C2h4 then in c2h6. B.the bond lengths in SO3 are all identical and are shorter than a sufur oxygen single bond. C. the N-O bonds in the ...
Tuesday, January 9, 2007 at 3:36pm by Justyna

chemistry: please check answers.
1. How many valence electrons does a carbon atom have? A) 1 B) 2 C) 3 D) 4<<my answer 2. How many double covalent bonds are in an alkane? A) 0<<my answer B) 1 C) 2 D) 3 3. What is the general formula for a straight-chain alkane? A) CnHn B) CnHn+2 C) CnH2n D) CnH2n+...
Tuesday, April 30, 2013 at 10:30am by Anonymous

science - chemistry pH problems
Here is the hint I received on how to solve those tough pH problems I posted earlier: Both of these can be solved using the H-H and doing the algebra. The math itself is hard to type out, but in Q1 the values of [NaA] and [HA] are 0.04805 and 0.15195. In Q2 you will have to ...
Wednesday, October 11, 2006 at 7:46pm by ajones51

science - chemistry
Hi everyone, I have been trying to solve these two questions but am having trouble doing so and was wondering if someone could help me out. (1) You wish to make a 0.200 mol/L PIPES buffer (PIPES: 1,4-Piperazine-N,N'-bis(2-ethane-sulfonic acid), C8H18N2O6S2, pKa = 6.80) at a pH...
Sunday, October 8, 2006 at 12:52pm by ajones51

chemistry
Hello, a few questions: Thanks so much! 1. The heat capacities of titanium and water are 0.522 J g-1 K-1 and 4.184 J g-1 K-1, respectively. What is the final temperature of the titanium-water mixture if a 175.0-g sample of titanium, initially at 90.0oC, is added to 50.0 g of ...
Saturday, March 1, 2014 at 3:51pm by abby

Chem
I have a chemistry test that I need help with. My answers have stars by them Can someone please help me with the answers to this test??? Part 1 Matter as Energy & Structure 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed. Most...
Wednesday, July 20, 2011 at 1:52pm by Winona

Pages: <<Prev | 1 | 2

Search
Members