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February 14, 2016

Search: C6H12O6+CO2=2C2H5OH+2CO2, how many moles of CO2 are produce when .490 mol of C6H12O6 react with this equation

Number of results: 41,878

Chemistry
How many moles of Fe2O3 are required to produce 38.4 moles of Fe?
September 25, 2011 by Joseph

chemistry
If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon load be in lbs (lbs of...
December 15, 2014 by Anonymous

chemistry
If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon load be in lbs (lbs of...
December 15, 2014 by Nancy

chemistry
If your car gets 21.4 mpg, how many L of CO2, will you release into the atmosphere, if you drove the 1280miles from Towson University to Key West Florida for a much needed break after taking Chemistry 121? Assume 1.05atm and 17.0C. What would your carbon load be in lbs (lbs of...
December 15, 2014 by jessica

College Chem involving heat of combustion
Calculate the heat of combustion: 1.C2H4(g)+3O2(g)===>2CO2(g)+2h20(L) _____kJ/mol 2.2H2S(g)+3O2(g)===>2H2O(L)+2SO2(g) _____kJ/mol
October 31, 2010 by Anonymous

Chemistry
50 mL of copper(II) sulfate reacts with 50 mL of sodium hydroxide. Their concentrations are 0.3 M and 0.6 M respectively. The temperature increased to 23.6 C from 23.4 C. Determine the enthalpy change for the reaction in kJ/mol of sodium hydroxide. Q=mcΔT =(50g + 50g)(4....
March 3, 2013 by a Canadian

Chemistry 111
How many moles of methane are produced when 8206 moles of carbon dioxide gas react with excess hydrogen gas?
July 14, 2011 by angel

chemistry - equilibria
1. A(aq) + B(aq) C(aq) + D(aq) Initially, 1 mol of A and 1 mol of B are allowed to react and come to equilibrium. It is found hat there is 0.5 mol of A left at equilibrium. Calculate Kc for the reaction. how do i work out Kc? when ive done questions b4 ive had volume/conc ...
September 14, 2008 by alyx

Chemistry
What mass of oxygen is consumed when 1.73L of carbon dioxide (STP) are produced in the following equation. C4H8 + 6 O2 > 4 CO2 + 4 H2O please help and show your work. My answer for this problem is 11.12g/O2. I have no confidence in my answer.
April 16, 2012 by Randy

CHEM HELP
I asked this already but for some reason the answer I got isnt being accepted online Question: In the laboratory, 3.50 grams of salicylic acid were reacted with 7.20 ml of acetic anhydride (density equal to 1.08 g/ml). Determine the limiting reagent. I did: salicylic acid + ...
November 27, 2012 by Yaw

Chemu
Hi! I need help with my Chem homework. "When acetylene, C2H2, burns, how many liters of O2 at STp are used for every mole of acetylene burned?" (Balanced equation: 2 C2H2 + 5 O2 --> 4 CO2 + 2 H2O)
May 28, 2013 by Bridget

Chemistry
The thermochemical equation for the combustion of hexane is shown below. 2 C6H14 (g) + 19 O2 (g) → 12 CO2 (g) + 14 H2O (g) ΔH = 8326 kJ What is the enthalpy change for the combustion of 0.650 L C6H14 at STP?
October 19, 2013 by Hunter

Chemistry(the)
An optically active compound having molecular formula C6H12O6 is found in two isomeric forms (A) and (B) in nature. When (A) and (B) are dissolved in water they show the following equilibrium. (A) Equilibrium mixture (B) D = 1110 52.20 19.20 (i) What are such isomers called? (...
February 5, 2013 by abhi

chemistry
3 Cl2 + 6 KOH go toKClO3 + 5 KCl + 3 H2O How many moles of potassium chlorate form when 2 moles of potassium hydroxide react completely?
November 24, 2012 by linda

chem
How many moles of carbon are needed to react with 525 g of hematite 2FeO3+6C->4Fe+3Co2 idk how to convert moles of fe2o3 to carbon
September 29, 2013 by Julie

chem
ethane gas, or dicarbon hexahydride, undergoes cmbustion to produce carbon dioxide gas and water vapor. A. What mass of the un named reactant is required to react with 2.2 moles of ethane? B. How amny molecules of the product with the smaller % composition of the non oxide ...
May 10, 2011 by alex

Chemistry
Combustion analysis of 0.343 g of a compound containing C, H, and O produces 0.753 g of CO2 and 0.411 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol-1. What is the compound's: Empirical Formula:----- Molecular Formula:-----
March 25, 2010 by Abraham

chemistry
Combustion analysis of 0.213 g of a compound containing C, H, and O produces 0.468 g of CO2 and 0.255 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol-1. What is the compound's: Empirical Formula:(-------) Molecular Formula:(--------)
April 3, 2010 by sam

Chemistry
Combustion analysis of 0.284 g of a compound containing C, H, and O produces 0.623 g of CO2 and 0.340 g of H2O. Mass spectral analysis shows that the compound has a molar mass around 120 g mol-1. What is the compound's: Empirical Formula: Molecular Formula:
April 8, 2010 by Darali

chemistry
carbon disulfide and carbon monoxide are produced when carbon is heated with sulfur dioxide. 5C(s)+2SO2(g)-CS2(I)+4CO(g) a. how many moles of C are needed to react with o.500 mol SO2? 0.500mol SO2 x5C/2SO2=1.25C
June 24, 2010 by Ana

Chemistry
Did I answer this equilibrium question correctly? 2CO(g) + O2(g) <-> 2CO2(g) 1) How will increasing the concentration of CO shift the equilibrium? a] to the right [i chose this] b] to the left c] no effect 2] how will increasing the concentration of CO2 shift the ...
March 5, 2012 by Tracy

chemistry
In the balanced equation MnO2 + 4HCl = MnCl4 +2H2O, how many moles of MnCl2 will be produced when 1.25 mol of H2O are formed?
October 22, 2010 by Jerome

science
to prepare 500cm^3 of glucose solution of concerntration 1M. The chemical formula of glucose is C6H12O6.calculate (1)the relative molecular mass and molar mass.(2)the amount of glucose which will be in the solution.(3)the mass of glucose to be weighed
July 1, 2012 by abajane

science
to prepare 500cm^3 of glucose solution of concerntration 1M. The chemical formula of glucose is C6H12O6.calculate (1)the relative molecular mass and molar mass.(2)the amount of glucose which will be in the solution.(3)the mass of glucose to be weighed
July 1, 2012 by abajane

Chemistry(Please help, thank you)
For the equation: deltaHrxn = qrxn / mol substance to calculate deltaH per mole what does the mol substance mean? Does this mean that you use the mm of the substance or if you already calculated the # of moles of a substance do you use that?
February 13, 2012 by Hannah

Chemistry Octane Combustion
Write the balanced equation for the combustion of octane (C8H18). Assuming that gasoline is 100% octane, with a density of 0.692 g/mL, what mass of CO2 is produced by combustion of 1.7 1010 gal of gasoline? Need help on how to get started, I have the balanced equation...
September 15, 2009 by Chemistry

Chemistry
The biomass formula for a yeast is CH1.66 00.269 N0.194. The formula accounts for 92% of dry mass; the other 8% is inorganic material (ash). When grown on C6H14, the yield on biomass is 1.4 gcell/gsubstrate. What is the respiratory quotient (mole CO2 produce/mole O2 consumed...
September 4, 2012 by Parker

chemistry
Ethylene glycol, C2H6O2, is used as antifreeze for automobile engines. If you want to produce 2.00 kg of ethylene glycol from the reaction of C2H4Cl2 and Na2CO3, what is the minimum amount of Na2CO3 that is needed? C2H4Cl2(l) + Na2CO3(s) + H2O(l)=C2H6O2(l) + 2NaCl(aq) + CO2(g)
April 27, 2012 by Maggie

chemistry
I need a problem: LiOH + CO2 ---> Li2CO3 + H2O 1. to balance the equation? 2. write the reasons estequiometricas with regard to Li2CO3? 3.how much do masses of Li2CO3 form if we add 37g of LiOHa to the Rxn? thanks
March 4, 2011 by leslie

Chemistry
For the equation: deltaHrxn = qrxn / mol substance to calculate deltaH per mole what does the mol substance mean? Does this mean that you use the mm of the substance or if you already calculated the # of moles of a substance do you use that?
February 13, 2012 by Hannah

Chemistry
A mixture of N2, O2, and CO2 has a total pressure of 928. torr. In this mixture the partial pressure of N2 is 31.0 cm Hg and the partial pressure of O2 is 4.00 dm Hg. What is the partial pressure of the CO2 (in torr)?
July 8, 2014 by Luke

Chemistry balancing equations
Translate each of the following reactions into complete balanced chemical equations using international symbols & include states of matter at SATP. Assume pure states of matter unless otherwise indicated. I really need help with this stuff please. 1. The reaction of magnesium ...
December 2, 2011 by Fizzylicous

chm
What is the vapor pressure (in mmHg) of a solution containing 16.0 g of (3 marks) glucose (C6H12O6) in 80.0 g of methanol (CH3OH)? The vapor pressure of pure methanol at 27 C is 140 mm Hg. If the experimentally determined vapor pressure is 128 mm Hg, account for the ...
February 3, 2015 by jonny

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 ...
June 8, 2011 by Farah

Dr.Bob222
this is all my work so far on the limiting reagent problem I asked about yesterday about Calcium nitrate and ammonium fluoride.... 28.42g/164.1= .17318 mol Ca(NO3)2 29.6g/37.042=.79909 mol (NH4)F (1mol Ca(NO3)2 /.17318) x (2mol (NH4)F/x)=.34636 (2 mol (NH4)F/.79909)x(1 mol Ca(...
October 27, 2009 by Brittany

chemistry help
i have come up with two answers but i am not sure which one is correct. please help. Balance the following equation and give the value of the stoichiometric coefficient marked with a question mark. 1. 48 KNO3+ 5C12 H22O11 ? CO2+ 24N2+ 24 K2CO3+55 H2O a.
January 24, 2007 by key

chemistry
Consider the balanced equation 2A(g) + 3G(g) \ 2X(g) + Z(g). To a 20.0 L container maintained at a temperature of 127 C were added 0.200 mol of A, 0.500 mol of G, 0.400 mol of X, and 0.600 mol of Z. After equilibrium was established, it was found that 0.340 mol of X was ...
July 27, 2008 by alexis

Chemistry
I am so confused with my chemistry lab right now. We were given the following equations to work with: [Equation 1] 2 I^- + H2O2 + 2 H^+ ----> I2 + 2 H2O [Equation 9] 2S2O3^2- + I2 ----> 2I^- +S4O6^2- And During the Experiment we used the following for each reaction: T1...
September 20, 2014 by Bev

chemistry
3 moles each H 2 and I 2 are introduced into 1 lit box at temperature of 490'c. find concentration of H 2 in box at equilibrium is established?
October 4, 2011 by Anonymous

Chemistry
The Solvay process for the manufacture of sodium carbonate begins by passing ammonia and carbon dioxide through a solution of sodium chloride to make sodium bicarbonate and ammonium chloride. The equation for this reaction is H2O + NaCl + NH3 + CO2 → NH4Cl + NaHCO3. In ...
April 3, 2010 by David

Chemistry
Carbon monoxide and molecular oxygen react to form carbon dioxide. A 49.0 L reactor at 200C is charged with 1.14 atm of CO. The gas is then pressurized with O2 to give a total pressure of 3.54 atm. The reactor is sealed, heated to 350C to drive the reaction to completion, ...
December 18, 2014 by Derek F.

chemistry
In industry, sodium carbonate is produced in two stages whose equations are as follows: NaCl + NH3 + H2O + CO2 NH4Cl + NaHCO3 2NaHCO3 + heat Na2CO3 + CO2 + H2O a) Whats the mass of sodium carbonate that can be produced from 1.0 t of sodium chloride? (Assume that the other...
May 26, 2010 by paula

Chemistry
I'm having trouble understanding rate laws and manipulating them. So, for example, the rate law is rate= k[CO2][O3]. I was taught, maybe if I am just forgetting some pieces(been awhile), if I were to triple/double the partial pressure of CO2/O3, the rate of that element would ...
August 7, 2015 by Jake

ECONOMICS PLEASE PLEASE HELP!!
Lots of folks these days believe that CO2 emissions generated by human actions --- notably production of goods and services --- are causing climate change, more specifically, global warming. For the sake of dialectic discussion, let's suppose that claim is correct. If it is ...
November 6, 2010 by John

Chemistry: please help, I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
April 28, 2014 by Suzanne

ap chemistry
How many moles of sodium acetate (NaCH3COO) must be added to 1.000 liter of a 0.500M solution of acetic acid (CH3COOH) to produce a pH of 5.027? The ionization constant of acetic acid is 1.8 10−5. Answer in units of mol
February 4, 2014 by gabriella

Chemistry II
Calculate the enthalpy change in kilojoules when 54.7g of MgCO3 decomposes according to the following equation: MgCO3 (s) into MgO (s) + CO2 (g) My delta H answer was 100.6 KJ but the real answer is 76.1 KJ. Can someone please help?
November 29, 2009 by Mandy

Chemistry
Calculate the change in enthalpy for the following reaction: C25H52(g) + O2(g) → CO2(g) + H2O(l) I started off by balancing the equation: C25H52(g) + 38O2(g) → 25CO2(g) + 26H2O(l) Can someone help me with the rest.
October 17, 2012 by Dolcezza

Chem
Determine the number of moles of N atoms in 43.5 g of Mg(NO3)2. Textbook answer: 1.43 mol N My answer: 43.5 g Mg(NO3)x x (1 mol Mg(NO3)2/148.313 g Mg(NO3)2) x (2 mol N/1 mol Mg(NO3)2) = .293 Can tell me where i went wrong?
March 8, 2009 by Bob

Chemistry
1. Ca(OH)2(aq) + H3PO4(aq) Ca3(PO4)2(aq) + H2O(l) a. If you have 13.7mol of Ca(OH)2, how many grams of H2O are produced? b. How many grams of H3PO4 are required to produce 102.3g Ca3(PO4)2? c. How many moles of Ca(OH)2 are needed to produce 82.9g of Ca3(PO4)2? 2. Al2(SO4)3...
March 26, 2011 by Sulon

chemistry
1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the reaction
July 6, 2010 by jemy

chemistry
2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaCl how many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used? When amounts of both materials are listed one must worry about which is the limiting reagentalthough the problem seems to suggest that Na3PO4 is the ...
June 21, 2006 by Hawk

Chemistry
What would you do in order to solve this question: "The enthalpy of combustion for benzoic acid is -3223.6kj/mol. Use the values of the standard enthalpies of formation of liquid water and CO2 to calculate standard enthalpy of formation of benzoic acid."
November 29, 2014 by Kylie

CHEMISTRY- answer check
A 0.386g sample of a protein was dissolved in water and made up to a volume of 60mL at 21.0C. At this temperature the osmotic pressure of this solution was 1.24mmHg. Calculate the molecular mass of the protein 12682 g mol-1 95025 g mol-1 9627613 g mol-1 5706 g mol-1 125.17 g ...
October 9, 2010 by lulu

volume stoichiometry
Determine the volume of oxygen that is needed at STP to completely react with 5.63 g of potassium. 4K + O2 yields 2H2O I don't buy the equation. If K is reacting with oxygen, then the equation is 4K + O2 ==> 2K2O Actually, I think it forms K2O2. Do you have any information ...
March 19, 2007 by shelley

Analytical Chemistry
Suggest a range of sample masses for the indicated primary standard if it is desired to use between 35 and 45mL of titrant: (a) 0.175 M HClO4 titrated against Na2CO3(CO2 product) (b) 0.085 M HCl titrated against Na2C2O4 Na2C2O4-->Na2CO3+CO CO3(2-)+2H(+)-->H2O+CO2 (c) 0....
October 29, 2014 by Cherie

Chemistry
Oxygen can be produced in the laboratory by the reaction 2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is needed to produce 2.75 L of oxygen, collected over water at 37◦C and 94.9 kPa? The vapor pressure of water at 37◦C is 6.28 kPa. 1. 0.189 ...
November 20, 2012 by Caitlin

Science
6C+O2=CO2
March 31, 2008 by Louis Howard

Chemistry
Copper(II) chloride and lead(II) nitrate react in aqueous solutions by double replacement. Write the balanced chemical equation, the over all ionic equation, and the net ionic equation for this reaction. If 16.06g of copper(II) chloride react, what is the maximum amount of ...
March 16, 2010 by Steven

Stoichiometry
I am taking an online chemistry class and I do not at all understand how on earth how to do stoichiometry. I just dont get it, its not that I dont know how to do the math, but figuring out how to ger the information. PLEASE HELP!! When 11.7 grams of iron and 212.7 grams of ...
July 10, 2008 by Kesiah

Chemistry problem
How many moles of UF6 would have to be decomposed to provide enough fluorine to prepare 2.14 mol of CF4? I'm not sure how to solve this problem? So far all I did is calculate the moles of F in CF4, which is 8.56 moles
September 20, 2015 by Tina

Chem
Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m)= 3.26 x 100 / 15.78 = 20.7 b. %(...
November 7, 2010 by Jason

Chemistry
How many moles of propane are expected from the complete reaction of 82.8 g of propene? How many grams of propane are expected from the complete reaction of 101 g of propene? Kyle-- Here is a problem I worked last night for Kira (about half way down the page). It should give ...
April 5, 2007 by Kyle

Chemistry
1. What is the molar of a sodium bicarbonate solution prepared from 150 g of NaHCO3 in 150 mL solution? 2. What mass of glucose (C6H12O6) is needed to prepare a solution of 10 M, 5 L solution? 3. What volume in liters of a 4.0 M Ca(NO3)2 is needed to provide 50 g Ca(NO3)2?
May 4, 2015 by Anonymous

statistics
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval. solution I have but what do I ...
June 19, 2014 by Lucky Lady

chemistry, plz check work
NH3+H2S-->NH4HS <-- Kc=400 at 35 Celsius what mass of NH4HS will be present at equilbrium? My work NH3 H2S NH4HS initial 2 mol 2 mol 2 mol change -x -x +x equilibrium 2-x 2-x 2+x Kc=[NH4HS]/[NH3][H2S] 400=(2+x)/[(2-x)(2-x)] 400=(2+x)/(4-4x+x^2) 1600-1600x+400x^2=2+x 1598...
March 2, 2009 by Anonymous

Chemistry
a) Which of the following reagents would oxidize Zn to Zn2 , but not Ag to Ag ? Answers are: Co2+ Ca2+ Br2- Br2 Co or Ca b) Which of the following reagents would oxidize Ag to Ag , but not Cl to Cl2? Answers are: Co Br- Br2 Co2+ Ca2+ or Ca
June 2, 2014 by BOB

chem
What is the pH of the solution created by combining 2.40 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? I understand how to find the pH for the NaOH + HCl solution. However, I'm not sure how to find it for HC2H3O2. I ...
May 2, 2011 by Anonymous

Chemistry: Please check my work!I am stumped
When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: CO2, N2, NO, and H2O. If 239g of nitroglycerin explodes, what volume will the mixture of gaseous produces occupy at 1.00 atm pressure and 2678oC? a. Write a balanced equation for the reaction. b. ...
April 28, 2014 by Suzanne

chemistry
I feel like this question is pretty easy, but I can't seem to figure out how to go about solving it. It's like the solution is on the tip of my tongue: Nitromethane (CH3NO2) burns in air to produce significan amounts of heat. 2 CH3NO2(l) + 3/2 O2(g) -> 2 CO2(g) + 3 H2O(l...
March 19, 2014 by Jamie

Chemistry
For the following electrochemical cell, Co(s)/Co2(aq,.0155M)// Ag+(aq,2.50M)/Ag(s) 1.Write the net cell equation. 2.Calculate the following values at 25 degrees celcius. Eocell, Ecell, deltaGo rxn, and delta Grxn
July 25, 2013 by Brianna

Chemistry
Consider the following mixture of SO2(g) and O2(g).If SO2(g) and O2(g) react to form SO3(g),draw a representation of the product mixture assuming the reaction goes to completion. What is the limiting reactant in the reaction? If 96.0 g of SO2 reacts with 32.0 g O2, what mass ...
September 18, 2006 by pala

Chemistry
For many years the recovery of gold-that is, the seperation of gold from other materials-involved the use of potassium cyanide: 4AU + 8KCN + 02 +2H20 -> 4KAu(CN)2 + 4KOH What is the minimum amount of KCN in moles needed to extract 29.0 g (about an ounce) of gold? Now my ...
August 2, 2010 by Kate

chemistry
how many moles are in 243.6 g caco3? A.7.41 mol caco3 B 2.43 mol caco3 C.102.46 mol caco3 D.88.1 mol cao3 I say A
November 23, 2012 by drew

Chemistry
14. What is the number of moles in 42 g of NaCl? A. 1.8 mol NaCl B. 0.72 mol NaCl C. 0.61 mol NaCl D. 1.2 mol NaCl I'm sorry, I have no idea what I'm doing here.
August 15, 2013 by Jenny

chemistry higher
calculate the volume of hydrogen produced when 6g of magnesium is reacted with 100cm of 1 mol l-1 hydrochloric acid no of moles of Mg= mass/gfm = 6/24.3 = 0.247 moles 1/2 mole of Mg= 1/2 mole of H2 = 0.247 moles x 100 = 24.7cm3 ???
April 12, 2015 by iain

chemistry
Calculate the volume of solution that has a vapour pressure of 25.8 mbar and contains 200.3 g of galactose, C6H12O6, at a temperature of 22.0 C. The vapour pressure of pure water at 22 C is 26.40 mbar, the density of water is 1.00 g mL-1, and assume no change in volume ...
June 5, 2015 by Jane Smith

AP Chemistry
A 34.05 gram liquid sample of an unstable compound is deposited in a metal piston assembly that has a cylinder with a diameter of 20.0 cm. After the sample is added, the piston is placed in contact with the liquid and the piston vent is closed. This process removes all ...
September 26, 2012 by Jack

chemistry
Nitric oxide reacts with bromine gas at elevated temperatures according to the equation, 2 NO(g) + Br2(g) = 2 NOBr(g) The experimental rate law is rate = k[NO][Br2]. In a certain reaction mixture the rate of formation of NOBr(g) was found to be 4.50 x 10-4 mol L-l s-l. What is...
February 17, 2012 by Emile

Chemistry
A 0.1592g sample of a hydrocarbon upon combustion analysis produces 0.5008g CO2. Its molar mass is found in another experiment to be 70g mol. Determine the empirical formula, and its molecular formula. I completely messed up this question, and I don't know where I wen't wrong...
October 5, 2015 by Sarah

chemistry,
in analyzing household bleach. I have a flask that contains 10.00 mL diluted bleach + 0.4g KI + 20 mL distilled water and 20 drops of 2M HCl. To that I titrated 30.60 mL Na2S2O3 and I need to calculate the number of moles of NaOCl reacted. This is what I was thinking.. ...
April 10, 2007 by amy

Chemistry
2KMnO4(aq)+16HCl(aq)->2MnCl2(aq)+5Cl2(g)+8H2O(l)+2KCl(aq) A.)the volume of 0.414 M KMnO4 needed to produce 1.66 mol MnCl2 B.) the volume of 2.15 M HCl needed to produce 112 mL of 0.618 M KCl C.)the molarity (M) of the HCl solution when 26.42 mL react with 28.38 mL of 0.398 ...
December 10, 2010 by Anonymous

chemistry
a 12.0g of sample A (70.2g/mol)was burned in a bomb calorimeter in an excess of O2(g). A+2 O2(g)---> 2 CO2(g) +2 H2O(l) The temperature of teh calorimeter rose from 25.00 degrees celisus to 29.82 degree celisus. ifthe heat capacity of the calorimeter and its contents is 13....
November 19, 2012 by evelyn

Chemistry Please Help Thanks!
Calculate the volume of solution that has a vapour pressure of 25.8 mbar and contains 200.3 g of galactose, C6H12O6, at a temperature of 22.0 C. The vapour pressure of pure water at 22 C is 26.40 mbar, the density of water is 1.00 g mL-1, and assume no change in volume ...
June 4, 2015 by Ben

science
i need help with a packet that im struggling with my questions are write the total number of atoms present for the following questions: a. 4SO2 now i tried and got 8O'S and 1S b. 8O2 i tried and got 16 all together c. 3Al2(SO4)3 i tried and got 6Al, 3S, and 12O my next ...
January 12, 2015 by maddy

Chemistry
if an excess of Al and 7.9 mol of Br2 are reacted in equation 2Al + 3Br2= 2AlBr2, how many moles of AlBr2 will be formed assuming a 100% yield
November 3, 2012 by Tiffany

chemistry
A solution of fructose, C6H12O6, a sugar found in many fruits, is made by dissolving 22.0 g of fructose in 1.00 kg of water. What is the molal concentration of fructose the solution? What is the mole fraction of fructose in the solution? What is the mass percent of fructose in...
March 13, 2015 by Anonymous

Chemistry
Ethane gas, or dicarbon hexahydride, undergoes combustion to produce carbon dioxide gas and water vapor. A.) What mass of the un named reactant is required to react with moles of ethane? B.) How many molecules of the porduct, with the smaller percent composition of the non-...
May 9, 2011 by Anonymous

Chemistry
Ethane gas, or dicarbon hexahydride, undergoes combustion to produce carbon dioxide gas and water vapor. A.) What mass of the un named reactant is required to react with 2.20 moles of ethane? B.) How many molecules of the porduct, with the smaller percent composition of the ...
May 9, 2011 by Anonymous

Chemistry
A <---> 2B + C at a certain temperature the equilibrium pressure of the system is 0.318atm. Determine Kp for this reaction. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2B + C = 0.318atm /3 = 0.106 CO2 = 0.106 atm NH3 = 2(1.06) atm =0.212 atm Kp = PNH3 ^2 x PCO2 kp = 0.212^2...
October 8, 2008 by Tri

Chemistry
Given the following equation: SO2 + NO2 <--> SO3 + NO At 25 Celcius, 2.00 mol of each of SO2 and NO2 are introduced into a 1.0L sealed flask. When euilibrium is reached, it is found that [NO2] = 1.30 mol/L [SO3] = 1.30 mol/L -- Calculate the concentration at equilibrium ...
November 8, 2006 by Lily

chem
Consider the following unbalanced equation: C2H5OH(g) + O2(g) → CO2(g) + H2O(l) 1.55 g of ethanol reacts with 10.0 g of oxygen. What is the total volume of gas present (in L) after the reaction is complete, assuming the reaction takes place at 1.00 atm and 25oC? A) 0.572...
December 15, 2010 by Bogdanam

Chemistry
Balloon- CO2 Balloon- O2 Balloon- He Balloon- N2 Balloon- CH4 Represented above are five identical balloons, each filled to the same volume at 25 degrees Celcius and 1.0 atmosohere pressure with the pure gases indicated. A) which balloon contains the greatest mass of gas? ...
October 22, 2006 by Tina

CHEMISTRY
1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the reaction: 2NO (g) + O2 (g) ...
July 8, 2010 by jemy

Chemistry
In an experiment 0.5300 g of ferric oxide is reacted with 0.3701 g of carbon monoxide gas according to the equation: Fe2O3 + CO ==> Fe + CO2. A. What is the limiting reactant? B. What mass of the other reactant is in exess? C. What mass of iron is produced?
February 29, 2008 by Zachary

chemistry
if the chemical equation is CaCO3(s) + 2HCl(aq) > CaCl2(aq) + H2O(l) +CO2(g) and represents the reaction of an antacid, CaCO3, with a acid,HCl. why might someone using this antacid experience discomfort due to gas pains?
December 12, 2010 by Kaila(:

Science
if the chemical equation is CaCO3(s) + 2HCl(aq) > CaCl2(aq) + H2O(l) +CO2(g) and represents the reaction of an antacid, CaCO3, with a acid,HCl. why might someone using this antacid experience discomfort due to gas pains?
March 7, 2012 by Gana

chemistry
for the equilibrium H2+CO2<-->H2O+CO Kc=3.18 at 1106K. if each of the four species was initially present at 3.000M calculate the equilibrium concentration of the CO at this temperature..... OK I can get as far as equilibrium (final) H2O=3.000-x CO=3.000-xx H2=3.000+x CO2...
May 9, 2010 by Andy

Chemistry
I keep getting the last part of this question wrong. Strong base is dissolved in 765 mL of 0.200 M weak acid (Ka = 4.63 x 10^-5) to make a buffer with a pH of 4.18. Assume that the volume remains constant when the base is added. HA(aq) + OH-(aq) -. H2O(l) + A-(aq). I found ...
May 13, 2012 by Katherine

Chemistry
Zn metal was allowed to react with hydrochloric acid to produce hyrdogen gas.This gave a total of 555mL of gas collected over water at 20C and a pressure of 747mm of Hg. How many moles of hydrogen were collected? The vapor pressure of water at 20C is 18mm Hg.
March 5, 2012 by Cynthia

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