# how many mL of .122 M MnO4- are required to react with an excess of C2O42- in order to produce 75.25mL of carbon dioxide gas measured at 30 degree C and 715 torr?

14,335 results
1. ## Chemistry

how many mL of .122 M MnO4- are required to react with an excess of C2O42- in order to produce 75.25mL of carbon dioxide gas measured at 30 degree C and 715 torr?

asked by Allison on December 7, 2017
2. ## Science

MnO4+C2O42-=Mn2+ +CO2

asked by Penyetaraan redoks on October 17, 2016
3. ## Chemistry

3) The following set of data was obtained by the method of initial rates for the reaction: 2 HgCl2(aq) + C2O42-(aq) 􀀏 2 Cl-(aq) + 2 CO2(g) + Hg2Cl2(s) What is the rate law for the reaction? [HgCl2], M [C2O42-], M Rate, M/s 0.10 0.10 1.3 × 10-7 0.10

asked by Olivia on October 27, 2010
4. ## Inorganic chemistry

MnO4^-(aq) + H20(l) ==> MnO2 + OH^- net charg is -1 +7 (-8) ==> 4(-4) Manganese is reduced MnO4^- +3e- ==> MnO2 H2) is the oxidizing agent in a basic solution Mno4^- + H2O(l) --> MnO2(s) + OH^- Add on OH^- to both sides of the equation for every H+ ion

asked by Steve on April 14, 2009
5. ## chemistry redox titration

calculate the volume of a 0.02M mno4- solution that is required to react completely with 10.0ml of 0.1M c2o4-2

asked by carla on April 9, 2012
6. ## college chemistry

Balance the equation in aqueous acidic solution: C2O42-(aq) + MnO4-(aq) → Mn2+(aq) + CO2(g) please teach me how to do it!

asked by sparkle on November 4, 2010
7. ## Chemistry

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? The potassium ion is a spectator ion. You have written ionic equations (but omitted the arrows to separate

asked by Emi on April 30, 2007
8. ## Chemistry

Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 2.75 dm3 of O2 react with an excess of glucose (C6H12O2), according to the

asked by UnName on October 24, 2013
9. ## Chemistry

Balance the following in basic solution using the lowest possible integers and give the coefficient of water. MnO4- + C2O42- --> MnO2(s) +CO32-

asked by Mary on December 9, 2009
10. ## science

During standardization of permanganate solution using sodium oxalate, can the titration between Mno4- and C2o42- at 25degree celcius be perform? state the reasons.

asked by Angela on October 29, 2013
11. ## chemistry

How to make into compounds to get a formula? Li+: Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cu:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Pb2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Ca2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Al3+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4-

asked by Jessica on October 28, 2010
12. ## Chemistry

How to make into compounds to get a formula? Li+: Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cu:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Pb2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Ca2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Al3+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4-

asked by Jessica on October 27, 2010
13. ## Chemistry

Identify the following chemical equations by type. 1. If an electric discharge produces 800 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 75.0 dm3 of O2 react with an excess of glucose (C6H12O2), according to the

asked by Rikki on September 30, 2014
14. ## Chemistry

What is the reaction between mno4- and c2o42- and is there a colour change in this reaction?

asked by Ashley on June 26, 2014
15. ## balanced equation

? MnO4– + ?H+ + ?C2O42– --> ?Mn2+ + ?H2O + ?CO2 what's the balanced equation? correct coefficients? is it 1MnO4- + 2H+ + 1C2O42- --> 1Mn2+ + 1H20 + 2CO2 ? c2042..? are you missing parenthesis somewhere? oh i see, no i believe this is correct: MnO4- +

asked by christine on April 29, 2007
16. ## chemistry

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? A. KMnO4 is not added to either reaction. B. The presence of K+ would result in a net positive charge in

asked by Renee on April 28, 2008
17. ## Chemistry

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? A. KMnO4 is not added to either reaction. B. K+ is a spectator ion and redox reactions are written as net

asked by John on April 25, 2010
18. ## chemistry

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? A. The presence of K+ would result in a net positive charge in the products. B. The equations cannot be

asked by uci student on April 26, 2009
19. ## chemistry(check my asnwer)

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– Mn2+ + CO2 MnO4– + Fe2+ Mn2+ + Fe3+ ? A. KMnO4 is not added to either reaction. B. The presence of K+ would result in a net positive charge in

asked by eng on April 17, 2010
20. ## chemistry to Dr. Bob

Balance the equation: Note: If a chemical species coefficient is "1" then "1" needs to be entered in the field before that species. MnO4– + H+ + C2O42– Mn2+ + H2O + CO2 I'm not exactly sure how to do this question..Help?

asked by rich on April 27, 2008
21. ## chemistry

determination of the oxalate content in k2 cu(c2o4)2 .2h2o, during standardization of permanganate solution using sodium oxalate, can the titration between Mno4- and C2o42- at 25degree celcius be perform?

asked by ABCx on June 26, 2012
22. ## Chemistry

Performing a gravimetric analysis of Ca2+. 25 mL of unknown [Ca2+} added to 25 mL of 0.15 (NH4)2C2O4 and 75 mL of HCl. Urea also added. H2NCONH2 + 3H2O --heat→ CO2 + 2NH4 + 2OH CaC2O4*H2O --> Ca2+ + C2O42- [Ca2+]unknown=0.06028 M

asked by Anonymous on March 26, 2013
23. ## Chemistry question

This is a hard one. I'll do my best to try and translate =) A sour liquid mixture (many H+) contains Fe2+ ions and is being titrated with 0,0202M MnO4-. At the end of the titration, the amount of MnO4- that had been used up was 20cm3. How much was the mass

asked by avant on September 8, 2006
24. ## Chemistry;HELP

Volume Problems Answer the following questions. Scan and upload your questions and answers to your student section labeled Volume Volume Problems. Identify the following chemical equations by type. 1. If an electric discharge produces 500 cm3 of ozone

asked by Unknown on August 21, 2013
25. ## Chemistry

How many milimetres of 0.114 M sulphuric acid solution provide the sulfuric acid required to react with the sodium hydroxide in 32.3 ml of 0.122 M NaOH according to the following equation? H2SO4 + 2 NAOH ---> Na2SO4 + 2 H20 A millimeter is a unit of

26. ## chem

what mass of hematite (fe^2O^3)is required to react with excess carbon and produce 2.845g of iron, if the % yield is 75.369 formula is 2fe^2O^3+3C=4Fe+3CO2

asked by Anonymous on September 27, 2007
27. ## math

The equation 1/14 (196x+17-10)=______ (20x+12x) has no solution. The equation (4x+24/122)=_____ (x+16/122) Im sure the answer for the second one is 4, (4x+24/122) = 4 (x+16/122)

asked by Steve on May 7, 2016
28. ## math

The equation 1/14 (196x+17-10)=______ (20x+12x) has no solution. The equation (4x+24/122)=_____ (x+16/122) Im sure the answer for the second one is 4, (4x+24/122) = 4 (x+6/122)

asked by Steve on May 7, 2016
29. ## math

The equation 1/14 (196x+17-10)=______ (20x+12x) has no solution. The equation (4x+24/122)=_____ (x+16/122) Im sure the answer for the second one is 4, (4x+24/122) = 4 (x+16/122)

asked by Steve on May 7, 2016
30. ## MATH!

The equation 1/14 (196x+17-10)=______ (20x+12x) has no solution. The equation (4x+24/122)=_____ (x+16/122) Im sure the answer for the second one is 4, (4x+24/122) = 4 (x+6/122)

asked by Steve on May 7, 2016
31. ## Chem

Ores are analyzed by dissolving some of the ore and then performing an analysis of a metal (expressed in grams); usually the concentration of the metal is expressed as % of the amount of the ore (in grams) dissolved. An ore containing V was dissolved and

asked by Mariam on April 7, 2013
32. ## Chem 12

Given the two reactions: 5Fe2+(aq) + MnO4-(aq) + 8H+(aq) --> 5Fe3+ (aq) + Mn2+(aq) + 4H2O(l) 2MnO4-(aq) + 5C2O42-(aq) +16H+ --> 2Mn2+(aq) + 10CO2(g) + 8H2O(l) A.) Which reaction will occur at a faster rate? B.) Explain the reason for this result by

asked by Sam on February 12, 2009
33. ## Chemistry

can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical

asked by molly on October 2, 2016
34. ## Chemistry

can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical

asked by molly on October 3, 2016
35. ## chemistry

Use the equation below to answer the questions that follow. Br2 + Cl 2 ⎯→ 2BrCl a. How many moles of BrCl form when 2.74 mol Cl2 react with excess Br2? b. How many grams of BrCl form when 239.7 g Cl2 react with excess Br2? c. How many grams of Br2 are

asked by Kyree on June 2, 2010
36. ## chemistry

How many grams of 5.400 wt% aqueous HF are required to provide a 50% excess to react with 14.0 mL of 0.0236 M Th4+ by the following reaction? Th4+ + 4F - → ThF4 (s)

asked by john on January 15, 2012
37. ## Chemistry

So I did a titration experiment using 0.01 M potassium permanganate. In an erlenmeyer flask I placed a mass sample of FeSO4- with enough DI water to have a total volume of 20-25ml. I recorded the volume of MnO4- it took for the solution to change color

asked by ALex on July 15, 2012
38. ## Chemistry

Cu (I): CN- Pb2+: CN-, SO3^2-, PO3^3-,MnO4- Ca2+: CN- Al3+: CN-, SO3^2-, PO3^3-,MnO4- Cr5+: CN-, SO3^2-, PO3^3-,MnO4- Pb4+: CN- Sn2+: CN- Mn2+:MnO4- Ag+:CN-, SO3^2-, PO3^3- H+: CN-, SO3^2-, PO3^3-,MnO4-

asked by Nick on October 28, 2010
39. ## college chem

how many grams of NH4Cl are required to prepare 250 mL of .122 M NH4Cl solution? I set this up using the molarity equation and the part that I was missing is moles. So I divided the 0.122 by .25 L and got .031 mol. Then I took that and multiplied it by the

asked by kelly on June 2, 2009
40. ## Chemistry

Can someone help me balance this equation? MnO4(¨C) + H(+) + C2O4(2¨C)--> Mn(2+) + H2O + CO2 Sure but tell us what you don't understand about it. You need to learn how to do them yourself. Tell me what you don't understand, in detail, and I can help you

asked by Nancy on April 30, 2007
41. ## 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

asked by Helen on September 22, 2012
42. ## CHEMISTRY

A student combusted 0.500g of purified aluminum power with excess oxygen in an oxygen atmosphere according to the reaction, 4Al(s) + 3O2(g)= 2Al2O3(s) A) What is the limiting reactant? B) How many moles of Al were used? C) How many moles of Al2O3 would

asked by Gina on October 30, 2014
43. ## chemistry

what is the oxidation half reaction, reduction half reaction, and the complete balanced reaction of the following? (a) Al(s) + MnO4‾(aq) → MnO2(s) + Al(OH)4‾(aq) (b) Cl2(g) → Cl ‾(aq) + ClO ‾(aq) (c) NO2‾(aq) + Al(s) → NH3(g) + AlO2‾(aq)

asked by Anonymous on October 28, 2010
44. ## chemistry

When 21.29 g of element A react completely with 58.37 g of E, compound A2E is formed. When 5.41 g of A react with 32.36 g of G, compound AG is formed. If elements E and G react to form EG3, what mass in grams of G is required to react with 11.94 g of E?

asked by confused student.. on November 7, 2007
45. ## Chemistry

Which pair of ions will be most likely to react at standard state conditions? 1. a) MnO4- and Sn2+ 2. b) Zn2+ and Cl- 3. c) I- and Cu 4. d) Fe3+ and Cu2+

asked by Jake on May 15, 2012

Which pair of ions will be most likely to react at standard state conditions? a) MnO4- and Sn2+ b) Zn2+ and Cl- c) I- and Cu d) Fe3+ and Cu2+

asked by scilover on May 10, 2013
47. ## Chemistry

Barium-122 has a half-life of 2 minutes. If 10.0 g of Ba-122 are produced in a nuclear reactor how much Ba-122 will remain 10 minutes after production ceases? Question 11 options: 2.50 g 1.25 g 0.625 g 0.313 g

asked by Tamera on December 2, 2014
48. ## Chemistry

What is the reduction half-reaction for the reaction between iron(II) sulfate and potassium permanganate in a sulfuric acid solution? 5Fe2+(aq) + MnO4–(aq) + 8H+(aq) --> 5Fe3+(aq) + Mn2+(aq) + 4H2O(l) a. MnO4– + 3e– --> Mn2+(aq) + 4H2O b. MnO4–(aq)

asked by Zakaria on March 23, 2010
49. ## Chemistry

What is the reduction half-reaction for the reaction between iron(II) sulfate and potassium permanganate in a sulfuric acid solution? 5Fe2+(aq) + MnO4–(aq) + 8H+(aq) --> 5Fe3+(aq) + Mn2+(aq) + 4H2O(l) a. MnO4– + 3e– -->Mn2+(aq) + 4H2O b. MnO4–(aq)

asked by Husy on March 23, 2010
50. ## Chemistry

Question : State whether the following are true or false. SO2 gas changes the colour of a KMnO4(aq) solution They have taken this as false and given the following equation: SO2+H2O+2KMnO4-->K2SO4+MnSO4+H2SO4 (not balanced) But why they have taken this as

asked by Shenaya on July 29, 2017
51. ## 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?

asked by Skye on December 11, 2011
52. ## Chemistry

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day

asked by George on April 28, 2011
53. ## Chemistry

Here's is what I did: Collect water samples from Farm Lane bridge (500 mL minimum)þ Filter water samples using small mesh filter Note: Weigh the dried filter before filtration! Dry the filter in drying oven (~24 hours)þ Weigh the filter after drying. Day

asked by George on April 28, 2011
54. ## chemistry

Carbon monoxide, CO and hydrogen, H2, react accordingly: 4CO(g)+9H2(g)-->C4H10(g)+4H2O What volume of the EXCESS REACTANT remains if 17.2L CO and 42.1L H2 are allowed to react? Assume both gases are measured at 711 degree celsius and 1.33atm.

asked by jin on February 25, 2014
55. ## chemistry

What is the volume of 6M H2SO4 required by the balanced equation to react with the CuO to produce 0.025 moles of copper(ii) sulfate. Report the volume needed BEFORE allowing for excess in milliliters to two significant figures. Don not include units in the

asked by tj on October 2, 2014
56. ## Chemistry

A solution containing a mixture of 0.0381 M potassium chromate (K2CrO4) and 0.0769 M sodium oxalate (Na2C2O4) was titrated with a solution of barium chloride (BaCl2) for the purpose of separating CrO42– and C2O42– by precipitation with the Ba2 cation.

asked by Anne on October 15, 2015
57. ## Chemistry

For the following electrochemical cell: Fe(s) / Fe2+(aq) // MnO4–(aq) Mn2+(aq) / Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. 5Fe(s) + 16H+(aq) + 2MnO4–(aq)--> 2Mn2+(aq) + 8H2O(l) + 5Fe2+(aq) B.

asked by Amy on May 9, 2008
58. ## Chemistry

For the following electrochemical cell: Fe(s) | Fe2+(aq) || MnO4–(aq), Mn2+(aq) | Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. 2Mn2+(aq) + 8H2O(l) + 5Fe2+(aq)-> 5Fe(s) + 16H+(aq) + 2MnO4–(aq) B.

asked by David on April 21, 2008
59. ## Chemistry

For the following electrochemical cell: Fe(s)/Fe2+(aq)//MnO4–(aq), Mn2+(aq)/ Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. 2Mn2+(aq) + 8H2O(l) + 5Fe2+ ==> (aq)5Fe(s) + 16H+(aq) + 2MnO4–(aq) B. 5Fe(s)

asked by Matt on April 19, 2008
60. ## Chem

For the following electrochemical cell: Fe(s) Fe2+(aq) MnO4–(aq) Mn2+(aq) Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. Fe(s) + 8H+(aq) + MnO4–(aq)Mn2+(aq) + 4H2O(l) + Fe2+(aq) B. 5Fe(s) + 16H+(aq) +

asked by Anonymous on May 7, 2011
61. ## Chem

For the following electrochemical cell: Fe(s) Fe2+(aq) MnO4–(aq) Mn2+(aq) Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. Fe(s) + 8H+(aq) + MnO4–(aq)Mn2+(aq) + 4H2O(l) + Fe2+(aq) B. 5Fe(s) + 16H+(aq) +

asked by Anonymous on May 7, 2011
62. ## Chemistry

For the following electrochemical cell: Fe(s) / Fe2+(aq) // MnO4–(aq) Mn2+(aq) / Pt(s) Which letter corresponds to the correct balanced chemical equation in an acidic solution? A. 5Fe(s) + 16H+(aq) + 2MnO4–(aq)--> 2Mn2+(aq) + 8H2O(l) + 5Fe2+(aq) B.

asked by Amy on May 9, 2008
63. ## Chemistry

Using the change in oxidation number method, balance the redox reaction shown below. (NO2^2)+ (MnO4^-)---> (NO3^-)+ Mn^2+ Divide into half reactions. I will show you how to do MnO4^- and you do the other one. MnO4^- ==> Mn^+2 Step 2. Determine the

asked by Aubrey on June 17, 2007
64. ## Chemistry

320g of sulfur dioxide react with 32.0g of oxygen and excess water to form sulfuric acid (H2SO4) a. What is the limiting reagent? b. What is the theoretical yield of product? c. How many grams of excess reagent will remain?

asked by Kelly on January 11, 2012
65. ## Chemistry

A 1.00 g sample of limestone is allowed to react with 100 cm^3 of 0.200 mol/dm^3 HCl. The excess acid required 24.8 cm^3 of 0.100 mol/dm^3 NaOH solution. Calculate the percentage of calcium carbonate in the limestone

asked by Gary on July 10, 2016
66. ## chemistry

I need to know how to figure this out, step by step... Don't assume I know anything.. Break it down for me like I'm a 5 year old... I'm really horrible at figuring out where to even begin... what steps to use.. etc.. Thank you!!

asked by Jennie on March 2, 2015
67. ## Chemistry

Which of the following is NOT TRUE? A. The blank for this experiment must have 100 % transmittance if placed in a spectrometer (Spec 20). B. The volume required to titrate the blank is subtracted from the volume used to titrate the analyte solution to give

68. ## Chemistry

Balance the following net iconic reactions, and identify which elements are oxidized and which are reduced: a. MnO4^- (aq) + S^2- (aq) --> MnO2(s) + S(s) b. IO3^- (aq) + I^- (aq) --> I2(s) c. Mn^2+ (aq) + BiO3^- (aq) --> MnO4^- (aq) + Bi^3+ (aq)

asked by Haseeb on September 30, 2017
69. ## Chemistry

I'm not sure how to do these...I keep getting the wrong answers... Please help someone... Mg(s) + 2 HCl(aq)= MgCl2 (aq) + H2(g) a. What volume of 15.7 M hydrochloric acid will react with 2.1 grams of Mg? b. What mass of magnesium will react with 8.5 liters

asked by Ava on April 15, 2016
70. ## Chemistry

Based on the balanced equation 2NBr3 + 3NaOH → N2 + 3NaBr + 3HOBr calculate the number of of excess reagent units remaining when 116 NBr3 molecules and 180 NaOH formula units react? I calculated the excess reagent to be NaOH. So is the units of remaining

asked by Kyle on January 22, 2012
71. ## Chemistry

How many grams of H2O are required to react with excess CaC2 to produce 23.0 g of C2H2 according to the following equation? CaC2 + 2H2O -> Ca(OH)2 + C2H2 a.4.5 b.15.9 c.31.8 d.1.766 I think this equation works out by multiplying 2 moles by the molar mass

asked by Rebecca on October 28, 2016
72. ## Chemistry Problem

A student proposes to use visible spectroscopy to measure the kinetics of the permanganate/oxalic acid reaction. The initial permanganate solution was very dark. For a 1 cm sample cell, the absorbance A = 2,500[MnO4]. As a practical rule of thumb, Beer's

asked by Amy on January 22, 2013
73. ## Science

Which of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'? A. A blank is composed of the solvent used to dissolve the analyte. For this experiment, the solvent is a combination of sulfuric acid, phosphoric

asked by John on April 27, 2008
74. ## Chemistry

A chemist carries out a reaction between 10.0g of sodium and 20.0g chlorine. Which reactant element is present in excess? What quantity of sodium chloride is produced? What quantity of the elment in short supply would have been required to react with all

asked by Austin on September 14, 2010
75. ## chem

(5) In this experiment MnO4-is reduced to Mn 2+ by the unknown. What is the equivalent weight of MnO4- for this experiment? 52.68 (6) How many equivalents of electrons were transferred from the unknown solution? (7) What is the Normality of the 1.00 mL of

asked by bry on October 28, 2011
76. ## chem

Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'? A. The volume required to titrate the blank is subtracted from the volume used to titrate the analyte solution to give the "corrected volume". B. A

asked by Anonymous on August 15, 2008
77. ## Chemistry

Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'? A. A blank is composed of the solvent used to dissolve the analyte. For this experiment, the solvent is a combination of sulfuric acid, phosphoric

asked by uci student on April 26, 2009
78. ## chemistry

Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'? A. A blank is titrated to correct for any reactive impurities in the solvent. For this experiment, the impurities would be reducing agents that would

asked by eng on April 17, 2010
79. ## chemistry

Benzene, C6H6, is a known carcinogen that burns in air according to the following unbalanced equation: C6H6(l) + O2(g)  CO2(g) + H2O(g) a. What is the mole ratio of O2 to C6H6? b. How many moles of O2 are required to react with each mole of C6H6? c. How

asked by ABCD on July 3, 2011
80. ## Chemistry

4.80 L of N2, at 25 ∘C and 1.22 atm , is mixed with 1.80 L of O2, at 25 ∘C and 0.122 atm , and the mixture allowed to react. N2(g)+O2(g)→2NO(g) How much NO, in grams, is produced?

asked by Ethan on November 6, 2015
81. ## chemistry

Vanadium is an environmental pollutant originating from some types of steel, but also from the combustion of fossil fuels. The amount of V2+ in an unknown sample is determined by potentiometric titration by 7.62 mM permanganate ion, MnO4 - . 25.00 mL of

asked by siri on July 24, 2016
82. ## Chemistry

"How many grams of the precipitate will form if 25.5 mL of 4.5 M solution of lead (II) nitrate is allowed to react with 35.5 mL of 3.0 M solution of potassium chloride? What is the concentration of the excess reactant after the reaction has reached

asked by cj on February 9, 2017
83. ## Chemistry Honors 10th

How much heat is required to warm 122 g of water by 23.0 degrees Celsius?

asked by Bria on April 21, 2010
84. ## CHEMISTRY

How much of h2so4 would be required to make 2.5dm3 of a 1/10 normal solution? 1)12.3g 2)24.5g 3)49.0g d)122.5g

asked by HARLEY on October 4, 2017
85. ## chemistry

1) C2H2O4(aq) = H+ (aq) + C2HO4- (aq); Keq = 6.5E-2 2) C2O42- (aq) + H+ (aq) = C2HO4- (aq); Keq = 1.64E+4 then what is the equilibrium constant for the following reaction: C2H2O4(aq) = 2H+ (aq) + C2O42- (aq)? Keq = 1070 Keq = 227 Keq = 2.21E-4 Keq =

asked by danny on February 25, 2015
86. ## Chemistry

1.3188g of antacid is weighed and mixed with 75.00mL of excess 0.1746M HCl. The excess acid required 27.20mL of 0.09767M of NaOH for back titration. Calculate the amount of CaCO3 in the tablet.

asked by B on June 8, 2015
87. ## Science

Carbon monoxide, CO, and hydrogen, H2, react according to the reaction below. 4 CO(g)+ 9 H2(g)--> C4H10(g)+ 4 H2O(g) What volume of the excess reactant remains if 19.6 L CO and 27.2 L H2 are allowed to react. Assume that the volumes of both gases are

asked by Alex on October 22, 2014
88. ## Chemistry

Why doesn't potassium ion K+ from KMnO4 appear in the following two unbalanced equations: MnO4– + C2O42– --> Mn2+ + CO2 MnO4– + Fe2+ --> Mn2+ + Fe3+ ? is it because K+ is just a spectator ion or is it because K+ would cause a net positive charge in

asked by Jared on July 4, 2007
89. ## chemistry

In a measurment 0.1M Kmno4 is used.determine the volume of solution required to react with 0.158M Na2s2o3 required?

asked by Abhishek Bhargav on March 14, 2013
90. ## chemistry

Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq) → 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc that must react with an

asked by Anonymous on January 8, 2013
91. ## Jefferson

Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq)→ 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc that must react with an

asked by Gloria on January 8, 2013
92. ## Chemistry 120

* If 13.3 kilograms of Al2O3(s), 58.4 kilograms of NaOH(l), and 58.4 kilograms of HF(g) react completely, how many kilograms of cryolite will be produced? * Which reactants will be in excess? *What is the total mass of the excess reactants left over after

asked by Rachel on October 6, 2012
93. ## Philosophy

Construct natural deduction proofs for each of the following. 118.2 p&(q&r).'. q 118.4 .'. ¬(p&(q&¬p)) 118.10 q .'. ¬(¬p&¬q) 122.3* p " q, ¬p " r .'.¬q " r 122.7* p " q, ¬(p " r) .'. ¬(q " r) 122.10 p " q, ¬q .'. ¬p

asked by Maggie on October 22, 2010
94. ## Chem.

Nitrogen oxide (NO) has been found to be a key component in the many biological processes. It also can react with oxygen to give the brown gas NO2. When one mole of NO reacts with oxygen, 57.0 kJ of heat is evolved. a) Write the thermochemical equation for

asked by Christopher on January 29, 2007
95. ## Chemistry

Use the chemical reaction below to answer the questions that follow. CuO(s) + H2(g) → Cu(s) + H2O(g) a. What is the limiting reactant when 19.9 g CuO react with 2.02 g H2? b. The actual yield of copper was 15.0 g. What is the percentage yield? c. How

asked by Kayla on March 17, 2011
96. ## chemistry

Please help with this problem =) The combustion of liquid chloroethylene, C2H3Cl, yields carbon dioxide, steam, and hydrogen chloride gas. I. write a balanced equation for the reaction (I sorta get this part) II. How many moles of oxygen are required to

asked by Jack on October 9, 2008
97. ## Analytical chemistry

The iron in a 0.6656 g ore sample was reduced quantitatively to the +2 state and then titrated with 26.753 g of KMnO4 solution. Calculate the percent Fe2O3 in the sample. the mass i get for fe2o3 is too big, but i don't know how else to do this problem,

asked by Gloria on August 3, 2013
98. ## Chemistry - Equations

I am a student in the ninth grade and I need help with the following problems because I do not understand how to do them. I appreciate your help and thanks once again. 7. in 2CO(grams) + O2(grams) => 2CO2(grams), what is the ratio of moles of oxygen used

asked by Theodore on February 1, 2008
99. ## chem

Is this the correct equatioin for the reaction of cyclohexene with MnO4- ? C6H10 + MnO4- ----> C6H10(OH)2 + MnO2

asked by aly on February 20, 2012
100. ## Chemistry

1. Ca(OH)2 + H3PO4 ---> H2O + Ca3(PO4)2 (A) How many moles of H3PO4 are needed to make 15g of H2O? (B) What mass in grams of Ca(OH)2 is used to react with 5.6mol of H3PO4? (C) How many grams of Ca3(PO4)2 are made from 134g of Ca(OH)2? 2. Fe2O3 + CO ---> Fe

asked by Sulon on March 26, 2011