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April 20, 2014

Search: CO2(g) + 2H2O(l)--2O2(g) + CH4(g)

Number of results: 5,875

Chemistry
Data: C(graphite) + O2(g) forms CO2 (ga) Delta H = -393.5kJ H2(g) + 1/2O2(g) forms H2O(l)Delta H = 285.8kJ. CH3OH(l) + 3/2O2(g)forms CO2(g) + 2H2O(l)Delta H = -726.4 Using data above, calculate the enthalpy change for the raction below C(graphite) + 2H2 +1/2 O2(g) forms CH3OH(l)
Wednesday, October 27, 2010 at 8:29am by lavonne

Chemistry
One example of chemical change is lighting a gas stove to cook material. That is the oxidation of methane. CH4 + 2O2 ==> CO2 + 2H2O Cooking is another example of chemical change; for example, baking bread. One example of a physical change is one suggested by Cathrine.
Thursday, June 5, 2008 at 11:55pm by DrBob222

AP Chemistry
Convert 93 gallons H2O to grams. I would use 1 gallon = 3.785 L, convert to mL then use density of 1.00 g/mL to solve for grams. How much heat is required to heat this much water (in grams) from 60 F to 99 F. Convert 60 F and 99 F to C using (F-32)*5/9 = C. Then q = heat ...
Friday, October 11, 2013 at 6:09pm by DrBob222

Chemistry 130
Will someone let me know if I did these correct? 1. Rank the following in order of increasing radius based on their positions on the periodic table: S, S-2, Cl a. S, S-2, Cl b. S-2, Cl, S c. Cl, S, S-2 d. Cl, S-2, S e. S, Cl, S-2 I believe it's C. Cl, S, S-2 Is that correct, ...
Tuesday, September 8, 2009 at 3:13pm by Jessie

Chemistry
Consider the following reaction: CH4 +2O2 -> CO2 + 2H2O. Delta H = -891 kJ Calculate the enthalpy change for each of the following cases: a. 1.00 g methane is burned in excess oxygen b. 1.00 x 10^3 L methane gas at 740. torr and 25 *C is burned in excess oxygen
Monday, October 11, 2010 at 1:04am by Anonymous

Chemistry
Which pair of molecules has the strongest dipole-dipole interactions? a- CO2 and CO2 b- CO2 and CH4 c- NH3 and NH3 d- NH3 and CH4 e- CH4 and CH4 Would it be C?
Sunday, November 8, 2009 at 8:57pm by Casey

Chemistry
Calculate ∆H˚ for the following reaction using the given bond dissociation energies. CH4 (g) + 2O2 (g) --> CO2 (g) + 2H2O (g) Bond.......∆H˚ (kJ/mol) O-O........142 H-O.........459 C-H.........411 C=O........799 O=O........498 C-O.........358 ∆H...
Wednesday, November 9, 2011 at 3:09am by Raj

Chemistry
If 6.0 liters of methane react with 12.0 liters of oxygen according to the equation CH4 + 2O2 → CO2 + 2H2O, and the temperature and the pressure are kept constant, which of the following is true? a. All the methane and oxygen react. b. Oxygen is in excess. c. Methane is ...
Friday, September 21, 2012 at 9:44pm by Helen

Chemistry
CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ Part A: What is the enthalpy change for the reverse reaction? Express your answer using four significant figures. Answer I got right: 726.5 kJ Part B: Balance the forward reaction with whole-number coefficients: CH3OH (l...
Tuesday, June 28, 2011 at 7:09pm by Lisa

Chemistry
Some bacteria get their energy from reduction of CO2 to CH4 by H2. 1. How many electrons are required to reduce CO2 to CH4? 2. Calculate the G for formation of methane based on the two standard reduction potential of -0.171V for reduction of CO2 to CH4 and -0.414V for ...
Sunday, September 29, 2013 at 5:12pm by Kam

Chemistry
Some bacteria get their energy from reduction of CO2 to CH4 by H2. 1. How many electrons are required to reduce CO2 to CH4? 2. Calculate the G for formation of methane based on the two standard reduction potential of -0.171V for reduction of CO2 to CH4 and -0.414V for ...
Sunday, September 29, 2013 at 9:09pm by Kim

AP Chemistry
yes. CH4(g) + 2O2(g) ==> CO2(g) + 2H2O(g) If you do it the other way though, you should get the same answer (with more work). n = PV/RT = 0.961*33.0/0.08206*293 = about 1.32 and plug that back into V = nRT/P = 1.32*0.08206*294/0.961 = 33.0255 but it will be exactly 33.0 if ...
Sunday, October 13, 2013 at 4:21pm by DrBob222

CHEMISTRY: URGENT
Here are the equations and some explanation. CH4 + 2O2 ==> CO2 + H2O 2C2H6 + 7O2 ==> 4CO2 + 6H2O -------------------------- The first equation is x + y = 30 Here is how you get the second equation. x cc CH4 gives x cc CO2 x cc CH4 USES 2x O2. y cc C2H6 gives 2y cc CO2 y ...
Monday, October 29, 2012 at 10:48pm by DrBob222

thermodynamics
1.82 kg x (0.850/0.142) x (1 mol CO2/1 mol CH4) x (44 g CO2/1 mol CO2) x (1 mol CH4/16 CH4) = ?
Monday, September 17, 2012 at 11:01am by DrBob222

Chemistry
Energy, q, w, Enthalpy, and StoichiometrySource(s): Consider the combustion of liquid methanol, CH3OH (l). CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ Part A: What is the enthalpy change for the reverse reaction? Express your answer using four significant figures. ...
Tuesday, June 28, 2011 at 7:53pm by Lisa

chemistry
Methane is CH4 and is oxidized as follows: CH4 + O2 ==> CO2 + H2O (not balanced). C2H5OH + O2 ==> CO2 + H2O (unbalanced). C6H12O6 + O2 ==> CO2 + H2O (unbalanced). You can see that methane, ethanol, and glucose are oxidized to their end products of CO2 and H2O when ...
Wednesday, August 4, 2010 at 3:40pm by DrBob222

chemistry
Write the balanced equation. CH4 + 2O2 ==> CO2 + 2H2O Two ways to do this: a) brute force. Use PV = nRT to calculate moles CH4 in the 3.00 L container. There is no P listed but you can choose a convenient one (I think 1 atm would be easy). Just remember to use the same P ...
Monday, March 8, 2010 at 3:41pm by DrBob222

ap chemistry
1. 2H(g)+O2(g)->H2O2 2. Na(s)+1/2Cl2->NaCl(s) 3. Co2(s)->Co2(g) 4. So2(g)+1/2O2->So3(g) 5. 2H2(g)+O2(g)->2H2O
Wednesday, October 31, 2012 at 5:43pm by cheri

chemistry
Two equations and two unknowns; solve simultaneously. Write and balance the chemical equations. CH4 + 2O2 ==> CO2 + H2O C2H6 + 7O2 ==> 2CO2 + 6H2O =========================== If we let x = pressure CH4 and y = pressure C2H6, then x + y = 294 mm is the first math equation...
Saturday, December 4, 2010 at 3:37am by DrBob222

chemistry
CH4 + 2O2 ==> CO2 + 2H2O Here is a worked example of a stoichiometry problem. Just follow the steps. http://www.jiskha.com/science/chemistry/stoichiometry.html
Thursday, December 16, 2010 at 8:25pm by DrBob222

Chemistry
Methane gas (carbon tetrahydride) reacts with oxygen by combustion: CH4 + 2O2 -> CO2 + 2H2O a.)How many moles of methane are needed to produce 3.5*10-4 moles of carbon dioxide? b.)How many moles of oxygen are needed to react form the 3.5*10-4 moles of carbon dioxide? c.)How...
Sunday, November 3, 2013 at 7:07pm by Kelsi

Chemistry equation balancing
I have to balance the following equation using the lowest number of coefficients CH4 + NH3 + O2 -- HCN + H2O I can get N,C and O to balance as follows CH4 + NH3 + O2 -- HCN + 2H2O I can get H,C and N to balance as follows CH4 + NH3 + 2O2 -- HCN + 3H2O I just can't seem to get ...
Wednesday, May 23, 2007 at 5:29am by Anna

Chemistry
First, you don't need to know m and n, because only the products count. However, m=2 and n=3.5. If written properly, equation 2 should be all multiplied by 2. For equation 1, calculate the RMM for each ingredient, then calculate the ratio of masses of CH4 and the products, ...
Friday, August 27, 2010 at 8:14pm by MathMate

chemistry
CH4(g) + 2O2(g) ==> CO2(g) + H2O(l) dSo rxn = (n*dSo poducts) - (dSo reactants)
Friday, October 5, 2012 at 10:24pm by DrBob222

chemistry
Burning 32 g of CH4 in excess oxygen will produce how much CO2 according to the equation CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
Sunday, January 22, 2012 at 1:13am by heens

Chemistry
well, the moles will be proportional to pressure. Balance the equations: CH4+2O2>>CO2 + 2H20 **1 C2H6+7.5 O2>> 2CO2 + 3H2O **2 so in methane, one gets the same amount of CO2 as CH4 In the ethane, one gets twice as much. So,of the final pressure, the difference is ...
Friday, August 13, 2010 at 2:29am by bobpursley

Chemistry
Which of the following reactions are spontaneous (favorable)? A] 2Mg(s) + O2(g) -> 2MgO(s) Delta G = -1137 kJ/mol .. B] NH3(g) + HCl(g) -> NH4Cl(s) Delta G = -91.1 kJ/mol ... C] AgCl(s) -> Ag+(aq) + Cl-(aq) Delta G = 55.6 kJ/mol .. D] 2H2(g) + O2(g) -> 2H2O(g) ...
Thursday, March 8, 2012 at 10:34pm by Kat

Chemistry
what is the numerical value of the equilibrium constant Kgoal for the reaction CO2(g) C(s) +O2(g)? by making use of the following information: 1. 2CO2(g)+2H2O(I) = CH3COOH(I)+2O2(g), K1=5.40x10^-16. 2. 2H2(g)+O2(g) = 2H2O(I), K2=1.06x10^10. 3. CH3COOH(I) - 2C(s)+2H2(g+O2(g), ...
Wednesday, March 9, 2011 at 2:51am by gin - More info to initial question. Please help

science
is 5.20x10^-3 in moles? combustion of methane (CH4): CH4 + O2 --> H2O + CO2 *combustion reaction: products are usually water and carbon dioxide balance this equation first, then use stoichiometric ratios (the ratio of the moles of CH4 and CO2), to find number of moles of ...
Thursday, October 28, 2010 at 8:58pm by jai

chemistry
a 5 g mixture of natural gas containing ch4 and c2h4 was burnt in excess of oxygen yielding 14.5 g of co2 and h2o.What is the weight of ch4 and co2 in the mixture.
Sunday, February 17, 2013 at 1:22pm by sim

chemistry
a 5 g mixture of natural gas containing ch4 and c2h4 was burnt in excess of oxygen yielding 14.5 g of co2 and h2o.What is the weight of ch4 and co2 in the mixture
Thursday, July 25, 2013 at 12:54pm by sim

Chemistry Urgent
3 is the easiest. The others are the same kind but are a little more complicated. This will get you stated on #3. CH4 + 2O2 ==> CO2 + H2O 2C2H6 + 7O2 ==> 4CO2 + 6H2O If O2 is 90 cc initially and excess O2 was 32 cc, then 90-32 = 58 cc O2 used. Let x = volume CH4 and (24-...
Monday, February 10, 2014 at 1:47pm by DrBob222

chemistry
Calculate the equilibrium constant at 25 C for CH4 + 2 H2O --> CO2 + 4H2 given: delta G for CH4 = -50.81 H2O = -228.6 CO2 = -394.4 H2 = 0
Monday, August 1, 2011 at 11:16am by hal

Chemistry
Consider the combustion of liquid methanol, CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures
Tuesday, June 28, 2011 at 2:06am by Lisa

Chemistry
Consider the combustion of liquid methanol, CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = -726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures
Tuesday, June 28, 2011 at 7:09pm by Lisa

chemistry
Balanced chemical equation, calculate how many moles of products would be prduced of 0.500 mole of the first reactant were to react completely. CO2 + 4H2 = CH4+ 2H2O
Wednesday, April 18, 2012 at 1:03pm by Anonymous

SCIENCE PLEASE HELP ME!!!!!!!! ASAP PLEASE PLEASE
Which chemical equation is balanced? (1 point) H20 H2 + 2O2 2H20 2H2 + O2 2H2O H2 + 2O2 H20 2H2 + 2O2 i think its c
Wednesday, April 9, 2014 at 12:22pm by Anonymous

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~

Chemistry
Did I do these right? Can someone let me know if I did them correctly? I had someone help me with the problems but know I want to make sure their the right answers? 1. Methane burns in oxygen according to the following equation: CH4 + 2O2 ----> CO2 + 2H2O What is the mass ...
Tuesday, September 8, 2009 at 4:22pm by Jessie T

Chemistry
C. Calcutate the % yield for the combustion reaction of methane, CH4, whe 100. g of methane react with an excess Oxygen gas to produce water and 230.g of carbon dioxide. Write the balanced equation. Convert 100 g CH4 to mols. Using the coefficients in the balanced eqution ...
Monday, October 29, 2007 at 9:32pm by DrBob222

Urgent Chemistry Problem!!
Calculate Delta G at 298 K for the following reactions. Ca(s) + CO2(g) + 1/2O2(g) -> CaCO3(s) 2KClO3(g) -> 2KCl(s) + 3O2(g) CH4(g) + 3Cl2(g) -> CHCl3(g) + 3HCl(g) Delta G^0f CHCl3 is - 70.4 kJ/mol The following reactions are important ones in catalytic converters in ...
Monday, April 1, 2013 at 5:20pm by Amy

chemistry
Ok, well it gives us the equation: CH4 + 2O2 --> CO2 + 2H20 ( I balanced it) And then it asks us to calculate: deltaHf (#of mol) I think we have to do that using the mole ratio and the balanced equation? Sorry if it's confusing :/
Monday, April 29, 2013 at 11:40pm by K

Chemistry
C H4 + 2 O2 --> CO2 + 2H2O C is 12 g/mol CH4 is 16 g/mol so we have one mol O is 16 g/mol O2 is 32 g/mol so we have one mole but we need 2 so Only half a mole of CH4 reacts with the one mole of O2 That is 6 grams of C with 16 of our 32 grams of O so 6 + 16 = 22 grams of CO2
Monday, June 20, 2011 at 8:30pm by Damon

chemistry
why does a can of soda explode in a hot car? As the temperature rises, the gas (carbon dioxide that make the fizzle in soda pop)exerts more and more pressure until the container ruptures. Any gas heated tries to expand due to greater molecular motion.If it is contained, it ...
Monday, May 21, 2007 at 10:54pm by Lillian

Chemistry
C(s)+2H2O(g)<->CO2(g)+2H2(g) Kp1=3.33 H2(g)+CO2(g)<->H2O(g)+CO(g) Kp2=.733 Multiply equation 2 by 2 and add to equation 1 to obtain: C(s) + 2H2O + 2H2 + 2CO2 ==> CO2 + 2H2 + 2H2O + 2CO Notice 2H2O cancels, 2H2 cancels, 1 CO2 cancels to leave C(s) + CO2 ==> ...
Thursday, February 7, 2013 at 8:27pm by DrBob222

Chemistry
What is the chemical equation for the combustion reaction between methanol and air? CH4 + O2 ==> CO2 + H2O. All hydrocarbons produce CO2 and H2O when they are combusted in air. The above equation isn't balanced. I assume you can do that? If not, ask OR take a shot at it and...
Thursday, January 18, 2007 at 10:28pm by Raj

chemisry
2NaHCO3 --- Na2CO3 + H2O + CO2 2Fe + 6 HCl -- 2 FeCl3 + 3H2 2HBr + Ca(OH)2 -- CaBr2 + 2H2O N2 + 3H -- 2NH3 2H2O -- 2H2O + O is this a redox ? what is oxidized, reduced
Wednesday, August 25, 2010 at 9:46am by Kelsey

science
Which of the following chemical reactions is written to show that mass is conserved? A H2O to H2+O2 B CH4+202 to CO2+2H2O C Mg+HCI to 3MgCI0+H2 D N2+H2 to NH
Tuesday, October 26, 2010 at 11:40am by Tiffany

AP chem
a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
Saturday, April 11, 2009 at 11:33pm by sarah

Chemistry
Write the balanced equation. CH4+2O2 >> CO2 + 2H20 for each mole of carbon dioxide produced, one mole of methane, and two moles of oxygen is used. Moles methane: .007/(16.04)
Monday, October 3, 2011 at 8:48pm by bobpursley

chemistrt
okay, i was taught to pick one of the reactant and convert it to the other one. so i got 1.11 mole of CO2 and 1.73 mole of CO2. so that means that CH4 is the limiting reagent? 1.11 mole of CO2 * 44.01 g of cO2 is 48.9 grams of CO2
Sunday, December 11, 2011 at 6:07pm by Skye

re-apchem post
Yes and no. You add the moles CO2 to moles H2O and use that for n but there should be no CH4 or O2 remaining if all of the CH4 and O2 have reacted. Moles H2O will be twice that of CO2.
Sunday, April 12, 2009 at 8:51pm by DrBob222

Chemistry
What ratio is used to carry out each conversion? a.mol CH4 to grams CH4 b.L CH4(g) to mol CH4(g)(at STP) c.molecules CH4 to mol CH4 I honestly don't kno what it's asking me I got 1 mol CH4/ 16(g) CH4 for a. 1 mol/22.4 L for b. and 6.02 x 10^23 molecules/1 mol but I don't think...
Friday, July 16, 2010 at 11:48pm by Anonymous

CHemistry
CH4(g) + CO2(g) <--> 2CO(g) + 2H2(g) Kp = 4.5 x 10^2 at 825 K An 85.0 L reaction container initially contains 22.3 kg of CH4 and 55.4 kg of CO2 at 825 K. Assuming ideal gas behavior, calculate the mass of H2 present in the reaction mixture at equilibrium.
Thursday, March 18, 2010 at 9:34pm by Krysten

9th grade chem
Using the following equation Ca(s) + 2C(s) --> CaC2(s) ^ H = -62.8 kJ CO2(g) --> C(s) + O2(g) ^ H = 393.5 kJ CaCO3(s) + CO2 (g) --> CaC2(s) + 2 1/2O2(g) ^ H = 1538 kJ Determine the heat of the reaction (in kJ) for: Ca(s) + C(s) + 3/2O2(g) --> CaCO3(s)
Friday, December 17, 2010 at 9:41am by Gabrielle

CHEMISTRY...........
1. If 29.0 L of methane, CH4, undergoes complete combustion at 0.961 atm and 140C, how many liters of each product would be present at the same temperature and pressure? My answer: (0.961 atm)(29.0 L) (413k) all divided by (413)(0.961 atm)=29.0 L CO2 I really don't understand...
Friday, October 11, 2013 at 10:58pm by DrBob222

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

Chem
Calculate the work (in kJ) when 1.80 moles of methane react with excess oxygen at 389 K: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) I got 11661.26 Calculate the change in entropy (in J/K) when 70.1 g of nitrogen gas is heated at a constant pressure of 1.50 atm from 12.0 C to 63...
Wednesday, March 27, 2013 at 6:31pm by Anonymous

chem repost
a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
Sunday, April 12, 2009 at 7:47pm by sarah

chemistry
a sample mixture of ch4 and c2h6 weighing 0.732 g burned to give 2.064 g co2. What is the mass of ch4 in the mixture?
Wednesday, July 4, 2012 at 4:04pm by lawrencly

Stoichiometry
How many grams of oxygen are required to completely burn 85.6 grams of methane (CH4)? CH4 + O2 → H2O + CO2
Wednesday, November 14, 2012 at 2:10am by Mike

chemistry
how many grams of CH4 (methane) must be burned to form 82.6g of H2O? equation: CH4+O2----> CO2+H2O
Thursday, January 16, 2014 at 9:13pm by frances

chemistry
how many grams of CH4 (methane) must be burned to form 82.6g of H2O? equation: CH4+O2----> CO2+H2O
Thursday, January 16, 2014 at 11:33pm by jocelyn

ap chem repost
a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
Sunday, April 12, 2009 at 5:24pm by sarah

chemistry - enthalpy change and finiding volume of
29. Consider the following chemical equations and their enthalpy changes. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) ΔH = −8.0 102 kJ CaO(s) + H2O(_) → Ca(OH)2(aq) ΔH = −65 kJ What volume of methane, at 20C and 100 kPa, would have to be combusted ...
Wednesday, June 8, 2011 at 2:36pm by Farah

chemistry
Close but no cigar. You find the gram formula mass, which is 16 for CH4 17 for NH3 44 for CO2 64 for SO2. So you have 1 mole CH4 2 moles NH3 1 mole CO2 1 mole for SO2. Now which will occupy the most volume at the same P and T. You may want to use PV = nRT You know P is the ...
Tuesday, November 3, 2009 at 2:49pm by DrBob222

chemistry
The following reaction is used in the commercial production of hydrogen gas. CH4(g) + 2H2O(g) CO2(g) + 4H2(g) a) In a closed system how would a catalyst affect the establishment of equilibrium in the system? b) How would the concentration of H2(g) at equilibrium be affected by...
Monday, March 31, 2008 at 7:14am by ChemMaster98

re-apchem post
a 2L container is charged with 2atm of O2 at 298 Kelvin. Ch4(g) + 2O2(g) --> CO2(g) + 2H20(g) calculate the partial pressure of methane needed to react completely with the O2 in the vessel. What is the total pressure after the reaction is complete if the temperature ...
Sunday, April 12, 2009 at 8:51pm by sarah

chemistry
when co2 dissolves in water, the following equillibrium is established, CO2 + 2H2O GIVES H3O(+) + HCO3(-) for which the equillibrium constant is 3.8 * 10^-7 and pH is 6. then what is the ratio of concentration HCO3(-) to CO2?
Saturday, February 5, 2011 at 6:42am by arpan

Chemistry
calculate the theoretical yield (in grams) of the solid product, assuming that you use 1.0 g FeC2O42H2O and that oxygen is the excess reactant. FeC2O42H2O (s) + O2(g) ---> FeO(s) + H2O(g) + CO2(g) Its balanced equation is 2FeC2O42H2O (s) + O2(g)----> 2FeO(s) + 4H2O(g...
Thursday, October 14, 2010 at 10:00am by sonya

Chemistry
First write the balanced reaction. It is CH4 + 2 O2 = CO2 + 2 H2O Each mole of methane makes one mole of CO2. You start out with 100/16 = 6.25 moles of CH4, and end up with the same number of moles of CO2, which has a mass of 44 g per mole. That makes 6.25 * 44 = 275 g To put ...
Thursday, April 28, 2011 at 12:17am by drwls

CHEMISTRY
How many grams of CH4 are required to produce 43 g of Cu according to the following equation: 4CuO + CH4 --> CO2 + 2H20 + 4Cu? I already tried to work the problem myself, and I may have gotten this right, but I do not have an answer key to compare to. #gCH4 = (43gCu) x (1 ...
Saturday, July 10, 2010 at 5:25pm by Casey

chemistry
please please please help me balance these two equations... 1. K2Cr2O7+H2C2O4.2H2O--> K[Cr(H20)2(C2O4)2].2H2O+CO2 2. K2Cr2O7+H2C2O4.2H2O--> K[Cr(H20)2(C2O4)2].3H2O+CO2
Monday, May 2, 2011 at 11:51pm by anonymous

Chemistry
A sample of natural gas is 80.0% CH4 and 20.0% C2H6 by mass. What is the heat from the combustion of 1.00 g of this mixture? Assume the products are CO2 and H2O. CH4 = -74.87 and C2H6 = -84.68
Thursday, November 1, 2007 at 9:18pm by Lauren

chemistry
A 10.00g sample of a mixture of CH4 and C2H4react with O2 at 25C and 1 atm to produce CO2 and water. If the reaction produces 520kJ of heat what is the mass percent of CH4 in the mixture? I don't want the answer just how to o
Monday, March 14, 2011 at 5:20pm by Aly

chemistry
Consider the reaction: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) ΔH = - 890.3 kJ What volume of CH4(g) at 25C and 755 Torr will produce 88600 kJ of heat when reacted with excess oxygen?
Monday, March 21, 2011 at 11:19pm by Kamila

chemistry
How many liters of hydrogen gas can be produced if 102 grams of methane gas (CH4) are combusted at 315 K and 1.2 atm? Show all of the work used to solve this problem. CH4 (g) + 2 O2 (g) CO2 (g) + 2 H2O(g)
Monday, December 19, 2011 at 3:19pm by sarena

typo--CHEMISTRY: URGENT
I made a typo in my last post. I wrote about half way into that second equation explanation a (7/2)cc and it should have been (7/2)y cc if you can locate and make the change. As for the equations, for the first problem it is true that H2O was not one of the residual gases; ...
Monday, October 29, 2012 at 10:48pm by DrBob222

Chemistry
4H2 + CO2 ==> CH4 + 2H2O You have 2H2 ==> 4H^+ + 4e and 2H2 + 4e ==> 4H^- so (a) is 4 electrons. If you add -.171 + 0.414 = ? Then dG = -nEF to calculate dG.
Sunday, September 29, 2013 at 9:09pm by DrBob222

science
CH4 + O2CO2 + 2H2O
Wednesday, May 22, 2013 at 8:43pm by Anonymous

AP Chemistry
so since there is a 1:1 ratio between Ch4 and co2, would the volume of CO2 formed be equal to the volume of methane?
Sunday, October 13, 2013 at 4:21pm by Anonymous

chemistry
Calculate how many moles of productwould be produced if .310 mol of the first reactant were to react completely. (a) CO2 + 4 H2 CH4 + 2 H2O CH4 _____ mol H2O _____ mol (b) C3H8 + 5 O2 4 H2O + 3 CO2 H2O _____ mol CO2 _____ mol (c) 3 H2SO4 + 2 Fe Fe2(SO4)3 + 3 H2Fe2(SO4...
Thursday, January 6, 2011 at 6:43pm by Anonymous

Calculating DHrxn?
What is DHrxn for the following reaction, CH4(g) + 2 O2(g) ---> CO2(g) + 2 H2O(l), given DHf[CH4(g)] = -74.8 kJ; ...DHf[CO2(g)] = -393.5 kJ; ...DHf[H2O(l)] = -285.5 kJ. a. ) -604.2 kJ b. ) 869.7 kJ c. ) -997.7 kJ d. ) -889.7 kJ e. ) 997.7
Friday, June 12, 2009 at 12:32am by AnthoniiEllis

Chemistry - enthalpy of combustion(help!!!)
Yes, that's the way to go with the CH4. My set of tables gave -74.81 kJ/mol for CH4 but use what you have in your tables. Just check them to make sure the numbers are right. The -502.5 kJ (I didn't check the math) is kJ/mol. To convert to grams you multiply by molar mass CH4. ...
Wednesday, June 8, 2011 at 10:12am by DrBob222

chemistry
From the following information, determine ΔHf of malonic acid, CH2(COOH)2(s). CH2(COOH)2(s) + 2O2(g) → 3CO2(g) + 2H2O(l); ΔH = 861.0 kJ Substance ΔHf (kJ/mol) CO2(g) 393.5 H2O(l) 285.8 A. 2613.1 kJ B. 1540.3 kJ C. 2613.1 kJ D. 891.1 kJ E. 891.1 kJ
Thursday, December 2, 2010 at 3:48pm by Jake

chemistrt
17.8 g of CH4 react with 55.4 g of O2 to form CO2 and H20 identify the limiting and excess reagent. what is the mass of CO2 produced? how much excess reactant is leftover?
Sunday, December 11, 2011 at 6:07pm by Skye

Chemistry
All volume measurements are carried out at the same temperature and pressure. If 20.0 L of O2 (g) are allowed to completely react with a sample of pure CH4 (g) in a combustion process producing CO2 (g) as the only carbon-containing product, what is the maximum volume of CH4 (g...
Thursday, December 1, 2011 at 4:58pm by Anonymous

Chemistry
Looks like the 1.0 mole of O2 is the limiting reagent. Only 0.5 moles of CH4 can react with it. So, when things are done, you are left with 0.5 mole CH4 (left over) 0.5 mole CO2 1.0 mole H2O
Monday, October 15, 2012 at 3:10am by Steve

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
The combustion of methane can be described by the equation: CH4 (g) + 2 O2 (g) -> CO2 (g) +2H20 (g) If 22.0 mL of CO2 (g) were collected, what volume of H20 (g) also could be collected under the same conditions?
Friday, December 9, 2011 at 12:56am by Dani

chemistry
17.8 grams of CH4 reacts with 55.4 g of )2 to from CO2 and H20 what is the mass of H20 formed? and how much excess reactant is leftover? so i think that O2 is the limiting reagent and CH4 is the excess reagent help?
Sunday, December 11, 2011 at 7:38pm by Skye

chemisy
Methane (CH4) burns in oxygen to produce carbon dioxide and water vapor. The balanced equation is: CH4 + 2 O2 -> CO2 + 2 H2O What volume of carbon dioxide is produced when 3.2 L of oxygen are consumed?
Wednesday, December 5, 2012 at 9:49pm by Lena

chemistry
Methane (CH4) burns in oxygen to produce carbon dioxide and water vapor. The balanced equation is: CH4 + 2 O2 -> CO2 + 2 H2O What volume of carbon dioxide is produced when 3.2 L of oxygen are consumed?
Wednesday, December 5, 2012 at 9:50pm by Lena

Chemistry
1 mol CH4 x (16 g CH4/1 mole CH4) = ?g CH4 L CH4 x (1 mole CH4/22.4 L) = ? moles CH4 #molecules CH4 x (1 mole/6.022 x 10^23 molecules) = ? moles CH4 The fraction (ratio) in parentheses is the ratio the problem is asking for. You did b right. Note that in my solutions for a). ...
Friday, July 16, 2010 at 11:48pm by DrBob222

CHemistry
Convert 22.3 kg CH4 to moles. Convert 55.4 kg CO2 to moles. Using PV = nRT convert moles of both CH4 and CO2 to pressure in the 85 L container. Then set up an ICE chart, substitute into the Kp expression, and solve. After you know x (if that's what you call the unknown), that ...
Thursday, March 18, 2010 at 9:34pm by DrBob222

Chemistry
Write the equation. Balance it. Convert 1 g CH4 to mols. mols = grams/molar mass. Use the coefficients to convert from mols CH4 to mols CO2. Convert mols CO2 to grams. g = mols x molar mass.
Sunday, April 22, 2012 at 7:12pm by DrBob222

chemistry
For the following reactions is delta Hrnx equal to delta Hf of the products : a. CaCO3(g)----> CaO + CO2(g) b. 2Na(s)+ Cl2(g) ---> 2NaCl(s) c. C(s)+ O2(g) -----> CO2(g) d. CO(g)+ 1/2O2(g)---> CO2(g) e. Na(s)+ 1/2Cl2(l) ---> NaCl(s) f. Na(s)+ 1/2Cl2(s) ---> ...
Thursday, October 23, 2008 at 1:31pm by Sara

chemistry
30.0 g CuO + 20.0 g CH4 can produce a maximum of __?__ g Cu. 4 CuO + CH4 _ 2 H2O + 4 Cu + CO2
Monday, December 5, 2011 at 1:44pm by Anonymous

chemistry
To be polar you must have two conditions. a. There must be a difference in the electronegativity (EN) of the elements making the bond AND b. The molecule must not be symmetrical. For example, CH4 is 2.1 for H and 2.5 for C for EN so that is a difference (although not all that ...
Monday, December 2, 2013 at 9:25pm by DrBob222

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