Sunday
December 4, 2016

Search: Chemistry (Stoichiometry)

Number of results: 55,978

Chemistry- Stoichiometry
"Why must a chemical reaction be balanced before it can be used in stoichiometry?" I mean, I get it, that the equation will be off if it doesn't start out balanced, but, why? How do I phrase that?
September 27, 2007 by Shelby

Stoichiometry
I am taking an online chemistry class and I do not at all understand how on earth how to do stoichiometry. I just don't get it, its not that I don't 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/stiochiometry
could someone please answer my chemistry/stoichiometry questions below both "anonymous one just chemistry on todays date
March 16, 2011 by "anonymous"

chemistry
answers to latenite labs chemistry lab#9 stoichiometry by loss of CO2
January 19, 2012 by Anonymous

Chemistry
What is the stoichiometry of elements in c2h6
February 15, 2012 by Bay

chemistry
did i answer the question: Explain how one of the major concepts learned in CHM 111 applies to everyday life. One major concept that was learned in CHM 111 that applies to everyday life is stoichiometry. Stoichiometry is founded on the law of conservation of mass where the ...
January 11, 2015 by edward

Chemistry
How many types of stoichiometry are there? Can you list them? Thanks I appreciate it!
January 14, 2013 by Kayla

stoichiometry problems
Hey I hve problems with calculate stoichiometry problems and next week I have a test about it can someone help me out and give me a site where everything is written step by step ....thank u guys :) I REALLY NEED HELP NO JOKING
November 12, 2010 by Tarkan

ap chemistry
did i answer the question: Explain how one of the major concepts learned in CHM 111 applies to everyday life. One major concept that was learned in CHM 111 that applies to everyday life is stoichiometry. Stoichiometry is founded on the law of conservation of mass where the ...
January 10, 2015 by edward

Chemistry
Why is it important to identify the limiting reactant in stoichiometry?
March 5, 2013 by Kristie

CHEMISTRY
may i please get some notes on stoichiometry because i don't seem to be getting anything.
September 1, 2011 by elizabeth

chemistry
The subject is stoichiometry. How many moles of NH3 can be produced from 12.0mol of H2 and excess N2?
September 14, 2013 by BeeBee

Chemistry/Stoichiometry
How many liters of H2 are needed to produce 2.00g of NH3? N2+3N2 ---> 2NH3
January 10, 2012 by Marianna

chemistry stoichiometry
can someone explain the stoichiometry going on here... so the questions is: A solution containing 0.20g of calcium salt is passed through a column containing the hydrogen form of a strong acid cation exchange resin. The resulting solution is neutralized with 35 mL of .1 M NaOH...
April 2, 2016 by Anonymous

Chemistry
How many grams of carbon dioxide are produced if you react 200g of benzaldehyde reacr with 32g of oxygen? its stoichiometry, i have no idea how to do this...
January 12, 2010 by Jason

chemistry
in stoichiometry, after you have balanced the formula, how do you know which substance is the one you use to convert all 4 times to get the wanted reults
March 16, 2011 by "anonymous"

Chemistry: Stoichiometry
calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)
April 14, 2011 by Opo

Chemistry: Stoichiometry
calculate the number of oxygen needed to oxidize 12.5grams of glucose (C6H12O6) into carbon dioxide and water. (Combustion reaction)
April 14, 2011 by Opo

Chemistry
When 320.62 grams of Bi2O3 react with excess of C, how many moles of Bi form? I know I need to use stoichiometry, but I can't quite seem to get the correct balanced equation.
June 30, 2011 by Brooke

Chemistry
I need help with Stoichiometry Mapping and solving using the "line bar" method Cl2P4(s)+6Cl2(g) --> 4PCl3(g) How many mL of PCl3 can be produced by the reaction of so g of Cl2(g)
March 8, 2012 by Help!

Chemistry
How many grams of CS2(g) can be prepared by heating 12.9 moles of S2(g) with excess carbon in a 7.00 L reaction vessel held at 900 K until equilibrium is attained? Stoichiometry is 1 to 1
February 21, 2013 by Moni

Chemistry
why is it important that the equations be balanced when performing mass-mass stoichiometry problems?
March 18, 2013 by Lindt

chemistry-stoichiometry
how many grams of chlorine can be liberated from the decomposition of 64.0g of AuCl3 by this reaction 2 AuCl3----> 2 Au + 3cl2
May 19, 2008 by lori

Chemistry ( stoichiometry )
How many grams of iron can be made from 16.5g of Fe2O3 by the following equation: Fe2O3 + 3 H2 -----> 2 Fe + 3 H2O.
November 10, 2010 by Sevi

chemistry
Why do you need to use amount in moles to solve stoichiometry problems? Why can’t you just convert from mass to mass?
June 2, 2010 by rob

chemistry-stoichiometry
If 5 moles of ammonia is produced in the reaction N2 + 3 H2 ¨ 2 NH3, the number of hydrogen moles consumed is ____?
December 14, 2011 by caity

Chemistry-Stoichiometry
what is the limiting reactant if 0.10 moles Fe and 0.16 moles O2 react according to the reaction 4Fe +3O2 -> 2Fe2O3?
October 19, 2013 by Barbara

Chemistry-Stoichiometry
A 1.146g mixture of the solid salts NaS)4 and PB(NO3)2 forms an aqueous solution with the precipitation of PbSO4. How would I write the molecular form of the equation for the reaction?
March 1, 2012 by Edward

Chemistry (Stoichiometry)
Two students react 15.50g of Lead (II) nitrate with 3.81g of sodium chloride. Predict the mass of the excess reactant left over when the reaction is complete.
May 8, 2012 by Josh

chemistry
hello i'm doing a redox stoichiometry lab having to do with titration 6H +5H2O2 + 2MnO4 -- 5O2 + 2Mn2+ + 8H2O Why is H2O2 the source of O2 product in this titration?
March 22, 2012 by Jo

Science (Stoichiometry with Gasses) (Chemistry)
If 1.00 kg of methane (CH4) is burned completely (in excess O2) and the CO2 produced is collected at 20°C and 1.00 atm, what volume (L) will this CO2 occupy??
November 16, 2016 by Ray

chemistry, stoichiometry
Consider the Balanced Chemical Equation 2N2+6H20-->4NH3+3O2 How many moles would be needed to react fully with 0.225 moles of N2?
April 30, 2013 by Katie

chemistry
how do I write this equatio out and is it stoichiometry problem. Find the mass of sodium hydroxide needed to neutralize enough nitric acid to create 2.0 gram of sodium nitrate?
November 30, 2010 by Tosha

Chemistry
Acid Question!? An unusual category of acids known as superacids, which are defined as any acid stronger than 100% sulfuric acid, can be prepared by seemingly simple reactions similar to the one below. In this example, the reaction of anhydrous HF with SbF5 produces the ...
March 30, 2007 by Anonymous

Chemistry / Stoichiometry
When 1 mol of CH4 is burned, 490 kJ of energy are released as heat. CH4 + O2 -> 2H2 + CO2 If 3.2g of CH4 are burned, what is the value of the heat of the reaction? The answer worked in class was -180 kJ, but while I was redoing problems, I got the answer 98 kJ (both ...
April 9, 2016 by Caitlyn

chemistry- stoichiometry problems
Mg+2 NaF-> MgF2+2 Na If you start with 5.5 grams of lithium chloride, how many grams of calcium chloride will be produced?
April 22, 2009 by anon

Chemistry
Please help with these 2 stoichiometry questions. How many grams of NH3 can be produced from 3.98 mol of N2? How many grams of H2 are needed to produce 10.41g of NH3?
September 27, 2010 by Sarene

chemistry!
[blank] mL of 6.0 M H2SO4 are needed to prepare 300 mL of 1.0 M H2SO4 solution. 50 mL x M = mL x M (works for dilution problems but not for all stoichiometry problems.)
April 29, 2007 by Emi

chemistry- stoichiometry problems
C2H4+3 O2->2 co2+2 H2O If you start wit 45 grams of C2H4 how many grams of carbon dioxide will be produced?
April 22, 2009 by anon

Chemistry
Why did you need to know the density of the bleach solution? Why didn't you measure the density of h2o2 solution as well? Stoichiometry lab problem
October 28, 2012 by HELP PLEASE

chemistry
career opportunities availiable in nursing. 2 companies /organizations in the area that offer jobs in this career?? what are some areas/concepts that are important for that career? is it solutions, reactions, stoichiometry??
May 21, 2015 by reina bonilla

Chemistry (Stoichiometry)
what mass of so2 is produced from the reaction between 31.5g of s8 and 8.65g of o2? I know how to find the limiting reagents and all but I need a little help knowing how to find the mass of the product.
May 3, 2010 by Jill

Chemistry
What volume of carbon monoxide gas (at STP) is needed when 1.35 Moles of oxygen gas react completely in the following equation. 2CO + O2 > 2CO2 please show your work I'm having trouble with Gas Stoichiometry.
April 16, 2012 by Randy

Chemistry
Please help me with this chemistry question? I am working on a lab report and I am stuck on this question: Use the concept of stoichiometry to explain why balanaced equations are necessary when performing calculations in chemistry. Propose a situation where precise amounts of ...
September 8, 2009 by Jessie

CHEMISTRY STOICHIOMETRY!!!!!!!!
AN an antacid tablet contains 0.1g of magnesium hydrocarbonate, what nass of stomach acid, HCL, will it neutralise? Wine is made by the fermentation of the sugar in grapes. Surose-> Ethanol+Carbondioxide. Whta massof ethanol can be obtained from 6.00kg of sucrose?
November 10, 2007 by akan

Dr. Bob?/chemistry help
i have a final tomorrow and im allowed to have notes. however i lost my notes on stoichiometry. can someone give me a site that will help with balancing equations, performing calculations: mol, g, liters/gas and reagent/% yields?
June 9, 2009 by Chris

Chemistry
I am working on a redox stoichiometry lab. I need to calculate the moles NaBO3*4H2O. Mass=1.0133g in 100mL solution In my experiment I used 9.98mL and titrated in with KMnO4. I'm really confused about how to calculate the moles. Thanks for any help!!!!
March 17, 2012 by Sheena

Chemistry
This is a stoichiometry equation. Cu(s) + 4(HNO3)(aq) -> Cu(NO3)2(aq) + 2(NO2)(g)+2(H2O)(l) If you use 6 moles of nitric acid 4(HNO3), how many moles of Copper (II) Nitrate Cu(No3)2 will be produced?
February 14, 2016 by Bryce

Chemistry
Im's So confused about stoichiometry. My question is this use stoichiometric calculations to predict the mass of solid product fromed in the reaction from the knwon mass of sodium hydrogen carbonate used. Balenced equation: 4NaHCO3 = 4Na + 2H2O + 4CO + 3O2
November 1, 2008 by Lindsay

11th grade
how do you do STOICHIOMETRY?
February 8, 2010 by kewan

Chemistry
what is the maximum amount of NO2 which could be formed from 14.75 g of NO and 1.28 g of O2? Answer in units of mol. i believe its 2 NO + O2 -> 2 NO2 but I'm not sure and i don't know what to do when i tried with stoichiometry i got .4916 but when i got told its the wrong ...
March 17, 2016 by Matt

chemistry
stoichiometry problem Fe2O3+HCl=H2O+FeCl3 If 42.2 grams of iron(III) Oxide react with HCl how many gramd of iron(III)chloride should be produced
November 13, 2016 by yvette

chemistry (science)
What volume of methanol is formed if 2.86×10^11 of methane at standard atmospheric pressure and 25 degree celcius is oxidized to methanol? The density of CH3OH is 0.791g/mol . Assume that the oxidation of methane to methanol occurs in a 1:1 stoichiometry.
February 15, 2010 by beeni

Chemistry
Why do we need to use amount in moles to solve stoichiometry problems? Why can't I just convert from mass to mass? I'm not sure how to answer. I think I know the answer and just can't formulate it into words.
March 4, 2010 by Ana

chemistry!
i lost my notes for Stoichiometry and have a final tomorrow. ASAP would be appreciated. im trying to find a site that can help me with balancing word equations calculations:mol,g,liters-gas and determining limiting reagent and % yields. please please please help me.
June 9, 2009 by chris

chemistry
Stoichiometry 0.083grams of lead nitrate, Pb(NO3)2, in solutions mixed with 0.300g of sodium iodide in solution. This results in the formation of a yellow precipitate of lead iodide. Calculate the weight of the precipitate.
September 18, 2009 by Anonymous

Chemistry
A certain amount of methane is burned. Using stoichiometry it is calculated that 18.85 g of carbon dioxide should be produced. Carried out in the lab, 16.34 g of carbon dioxide are actually produced. What is the theoretical yield of the reaction?
July 8, 2012 by Abby Walker

Chemistry Stoichiometry
The density of chloroform at a pressure of 220 mmHg and 25 degrees celsius is 1.42 g/L. Calculate the molar mass of chloroform. My set up is: mol*K .289 atm 1 1.42g/L ------------- ------------ ------ --------- .08206Latm 1 298K What I am unsure of is if this is the right way ...
June 27, 2015 by Jack

Chemistry
If 150.0 g of butane (C4H10) gas are burned, how many grams of carbon dioxide gas will be produced? Report your answer to the nearest whole number and do not include units in your answer. Do not use scientific notation for your answer. This is a stoichiometry problem.
July 8, 2012 by Abby Walker

Chemistry/stoichiometry
If you can do just one for me I can used it as a template to do the rest. Thank you in advance For each reaction, calculate the mass (in grams) of the product formed when 10.3 of the underlined reactant completely reacts. Assume that there is more than enough of the other ...
October 26, 2012 by Dale

Chemistry (Stoichiometry)
Potassium superoxide (KO2)reacts in the following equation: 4KO2 + 2H2O +4CO2 =4KHCO3 + 3O2 If a person wearing an oxygen mask exhales 0.85 grams of CO2 every minute, how many moles of KO2 are comsumed every 10.0 minutes?
February 7, 2013 by Alexus

Chemistry
In stoichiometry, chemists are mainly concerned with a. types of bonds found in compounds b. energy changes occuring in chemical reactions c. mass relationships in chemical reactions d. speed with which chemical reactions occur i thought c?
March 10, 2010 by Ana

Chemistry- Stoichiometry
How many molecules of BrF2 form when 384g Br2 react with excess F2? equation: Br2 + 5F2 ---> 2BrF5 I really just need the guidelines to figure out the problem, i can figure out the rest from there. Please and thank you.
February 28, 2010 by Ana

Stoichiometry Test
What is the percentage of oxygen in____? Mg(OH)2
February 12, 2009 by Cool Dom

stoichiometry
what is the mole ratio of oxygen to water
May 7, 2013 by jojo

chemistry
Ammonia decomposes upon heating to produce nitrogen and hydrogen elemental products. Write a balanced equation and then use stoichiometry problem solving to determin the mass of nitrogen product that can form if exactly 25.50 grams of ammonia(NH3) is fully decomposed.
August 10, 2016 by anonymous

ap chemistry
Ammonia decompose upon intense heating to produce nitrogen and hydrogen elemental products. Write a balanced equation and then use stoichiometry problem solving to determin the mass of nitrogen product that can form if exactly 25.50g of ammonia is fully decomposed.
August 10, 2016 by anonymous

Chemistry; stoichiometry
Determine the theoretical yield of silver that is produced if the other product is Copper(II) Nitrate. Copper that reacted: 0.3180 This is what I had: 0.3180g Cu x 1mol Cu/63.5g Cu x 2mol Ag/1mol Cu x 107.87g Ag/1mol Ag = 1.079g Ag (Set up in factor label method)
December 7, 2014 by John

chemistry
25.00 mL of an acetic acid solution requires 23.86mL of a 0.1550M potassium hydroxide solution to reach the end point. What is the molarity of the acetic acid solution? (Hint: write the chemical reaction, and remember stoichiometry)
April 6, 2010 by shelley

stoichiometry
determine the number of moles in 4.50g of MgCl2?
April 22, 2012 by kim

Chemistry
For the reaction: 2HCl + Na2CO3→ 2NaCl + H2O + CO2 how much CO2 is produced at STP if 18.5 L of 1.15 M Na2CO3is used? The molar mass of Na2CO3is 106.01 g/mol. I know I have to use stoichiometry and possibly PV=nRT but I don't know what to use first. Do I start with 18.5L?
March 17, 2013 by Kelly

Organic Chemistry
I realize this is a general chemistry stoichiometry question, however I can not fully grasp it. I am supposed to calculate the theoretical amount (volume) of 3M sodium hydroxide (NaOH) needed to convert 1.5g of benzoic acid to its salt. I got 0.012 moles of bezoic acid present...
January 20, 2011 by Me

stoichiometry
how many grams of water are produced when 2.50 moles of oxygen are used?
May 8, 2008 by holli

Stoichiometry
What mass of water is produced from 10g of sulfuric acid ?
July 1, 2016 by Kris

Chemistry 1
How many grams of a stock solution that is 92.5 percent H2SO4 by mass would be needed to make 250 grams of a 35.0 percent by mass solution? Can you please teach me how to do this? I get the other stoichiometry stuff, but this one tripped me up because I don't know how to set ...
February 1, 2011 by Brittany

chemistry
I am a freshman in college, and am taking a placement test soon, but haven't seen chemistry since 10th grade. I'd appreciate any help I can get from anyone here to help me solve this problem: Hydrogen and sulfur chemically combine to form the gas hydrogen sulfide, according to...
January 5, 2012 by John

chemistry
hello i'm doing a redox stoichiometry lab having to do with titration so we are given these two equations: 6 H + 3H2O2 + 2MnO4 ---> 4O2 + 2Mn + 6 H2O 6H + 5H2O2 + 2MnO4 --> 5O2 + 2Mn + 8 H2O it asks which reactant is the source of the O2 product in this titration ? Thank...
March 31, 2011 by jewels

stoichiometry
if 3.00 moles of water are produced, how many grams of oxygen must be consumed?
May 8, 2008 by holli

Stoichiometry
How much 6M HCl and NaHCO3 are required to make 1 quart of CO2?
June 1, 2011 by Piehead

Chem.
What is the overall stoichiometry for the reaction between iodide and peroxydisulfate ions?
February 13, 2014 by Kay.

Chemistry
I need help on this stoichiometry problem. I don't know whay my answer is incorrect. The fermentation of sugar to produce ethyl alcohol occurs by the following reaction: C6H12O6 -- 2C2H5OH + 2CO2 What mass of ethyl alcohol can be made from 1.00 kg of sugar? I keep getting 1012...
September 28, 2010 by Deni

Chemistry (stoichiometry)
22 moles of benzene are completely reacted with molecular oxygen, how many moles of carbon dioxide will be produced? and if 150 grams of water were produced, how many moles of oxygen must have reacted
March 1, 2016 by Alex

Chemistry Stoichiometry
Sulfuric acid can dissolve aluminum metal according to the following reaction. Suppose you wanted to dissolve an aluminum block with a mass of 25.7 . How many grams of H2 gas would be produced by the complete reaction of the aluminum block?
October 27, 2012 by Brianna

Chemistry 20
A student was experimentally checking the stoichiometry of a reaction. The student correctly predicted that the reaction should produce 1.82 g of al2(so4)3(s). When the student dried and weighed the al2(so4)3(s) produced, its mass was 1.94 g. The percent difference of the ...
November 20, 2016 by Tala

stoichiometry problem
how many grams of oxygen gas are needed to react with 5.7 moles of phosphorus
June 7, 2010 by mimi

scientist
what are some background information for the stoichiometry lab involving hcl and naco3
November 8, 2011 by scientist

Chemistry
8.40 grams of Hydrogen gas reacts with 48.2 grams of Oxygen gas. Give the mass of the water vapor produced and the mass of the excess reactant left over. Can somebody please explain stoichiometry to me? I've failed the test and the retest. I'm usually able to balance the ...
November 29, 2010 by Anna

Stoichiometry
if you have 66.6g NH3, how many grams of F2 are required for a complete reaction? please show work!!!!!
February 7, 2010 by Tristan

chemistry
I cannot figure out how to work this stoichiometry problem with the given equation: Mg+2HCl-->MgCl2+H2 What volume of hydrogen is produced from the reaction of 50.0g of Mg and the equivalent of 75g of HCl What do you not understand about it? It is a limiting reagent problem...
February 5, 2007 by Carter

chemistry
Consider Ba (NO₃)₂ + K₂SO₄ → BaSO₄ + 2KNO₃ (0.10 M) (0.10 M) (10.0 mL) (20.0 mL) Will the K₂SO₄ be sufficient to precipitate all the Ba⁺² ions in the Ba (NO₃)₂? Use Stoichiometry to answer this question.
January 30, 2013 by luke

Chemistry-stoichiometry ...help!
Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L
June 7, 2012 by Jeconiah

Chemistry-stoichiometry ...help!
Calculate the volume of carbon dioxide produced when 0.5 tonnes of iron are produced. When iron oxide is heated with carbon monoxide, pure iron and carbon dioxide are formed. Ans: 500000g/112g/mol= 13392.9L
June 7, 2012 by Jeconiah

Chemistry - Enthalpy change and stoichiometry
N2 + O2 = 2NO enthalpy change = +180.6kJ c) what is the enthalpy change for the formation of one mole of nitrogen monoxide? d) What is the enthalpy change for the reaction of 1.000 * 10^2g of nitrogen with sufficient oxygen? I do not understand how to calculate the above, can ...
February 23, 2011 by Farah

stoichiometry problems
How many grams of NaCl with a molar mass of 58.44 would be needed to make 2.5 L of 0.00500 solution?
November 23, 2008 by Cindy

Stoichiometry Problem?
How many Milliters of 18.0M H2SO4 are required to react with 250mL of 2.50 M Al(OH)3 if the products are aluminum sulfate and water?
March 29, 2009 by Anonymous

Gas Stoichiometry
What mass of ammonia is produced when 3.08 L of nitrogen (at STP) react completely in the following equation?
May 6, 2013 by Jenny

Chemistry
Given the following equation: 2CH3CO2H + Ca(OH)2 --> Ca(CH3CO2)2 +H2O If you start with 30 ml of a 5% solution of acetic acid, how much of a .1M Ca(OH)2 solution would it take to completely neutralize the acid? I'm not quite sure how to start? Should I convert 30 ml to ...
December 4, 2012 by Christie

Chemistry (stoichiometry)
18.5 grams of calcium chloride reacts with 25.7 grams of sodium phosphate and produces calcium phosphate and sodium chloride. What is the limiting reactant? (show work)
March 7, 2012 by Hannah

CHEMISTRY
I am struggling with organizing stoichiometry problems; I know how to solve them after they're set up. Here is an example: "An organic compound with a FW of 417 was analyzed for ethoxyl {CH3-CH2O-} groups with the rxn: ROCH2CH3 + HI --> ROH +CH3CH2I CH3CH2I + Ag + H2O-->...
May 16, 2008 by MICOLE

Chemistry
How would one work through this problem? -Calculate the number of liters of 1.25M solution that can be made from 6.400g of barium nitrate. - I know that it's just stoichiometry, but I'm confused. The formula for molarity is the number of moles of the solute divided by liters ...
May 7, 2016 by Charlie

  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. Next>>