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February 1, 2015

Search: Acetic acid is the active ingredient in vinegar. In a solution of acetic acid the following equilibrium is established: HC2H3O2

Number of results: 59,565

chemistry
How will the following system at equilibrium shift in each of the following cases? 2 SO3(g) <--> 2 SO2(g) + O2(g) H° = 197 kJ (a) SO2(g) is added (b) the pressure is decreased by increasing the volume of the container (c) the pressure is increased by adding Ne(g) (d) the...
March 30, 2008 by PHD Hopeful

chemistry
The enzyme Y catalyzes the elementary reaction AB-->A + B An enzyme concentration of 1.0M Y can convert a maximum of 0.5M AB to the products A and B per second. What will happen when each of the following is added to a solution that contains 1.0M Y and 0.8M AB? I have to ...
March 22, 2009 by tomi

Check out my anwser for this science question plez
The chemicals make rain acidic how does it happen? Is it this it? The chemicals from the black smoke gets mixed up in the water cycle and creates acid rain.
October 21, 2007 by Vero

SCIENCE(CHEM101)
iF 23.74Ml OF 0.01470m nAoh are required to completely neutrize 25.00mL of gastric juice,calculate the concentration of the hydrochloric acid(in g/L )in the stomach gastric juice.show steps and calculations
March 8, 2011 by MAHLATSE

chemistry(reacting masses)
When a 1 g sample of limestone was dissolved in dilute hydrochloric acid completely,0.38 g of carbon dioxide was generated.What was the percentage by mass of calcium carbonate in limestone?(Relative atomic masses : C=12, O=16,Ca=40.1)
November 18, 2011 by mary

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?
January 11, 2012 by Kelly

chemistry
Write an equation to represent the dissociation of propionic acid (CH3CH2COOH) in water. (Type your answer using the format H2O for H2O and [NH4]+ for NH4+. Use the lowest possible coefficients.)
March 18, 2012 by Anonymous

Chemistry
Consider the titration of 50 mL of 0.250 M HCl with 0.1250 M NaOH. Calculate the pH of the resulting solution after the following volumes of Na OH have been added. a) 0.00 mL b) 50.00 mL c) 99.90 mL d) 100.00 mL e) 100.1 mL The question is, I get, for example, 0.9 pH for "a." ...
April 27, 2013 by George

chemistry
25.0 g of sodium carbonate is combined with an excess of hdrochloric acid. in the end 5.70 g of sodium chloride is isolated. what is the percent yield of sodium chloride
November 15, 2011 by Anonymous

organic chemistry
a certain arene C8H10 is oxidized by potassium dichromate to benzoic acid, C6H5COOH. What is this arene? a. o-xylene b. m-xylene c. P-xylene d. ethylbenzene
July 19, 2008 by bob

chemistry
40grams of sodium hydroxide was reacted with sulphuric acid to give 35grams sodium sulphate.calculate the percentage yield of sodium sulphate.
April 25, 2011 by avril

Math
A provider requested 2% salicylic acid ointment. How many grams of a base ointment should be added to 60 g of 3% salicylic ointment to prepare the final product?
July 6, 2012 by Niricoel

Biology
In lactic acid fermentation, ______ is _______ a) lactate...oxidized b) pyruvate...reduced c) ethanol...oxidized d) NAD+...oxidized e) NADH...reduced
April 28, 2013 by Wendy

chemistry
H2(g) + I2(g) *) 2HI(g) + heat Which response includes all the following that will shift the equilibrium to the left, and no others?
March 10, 2013 by Anonymous

chemistry
H2(g) + I2(g) *) 2HI(g) + heat Which response includes all the following that will shift the equilibrium to the left, and no others?
March 10, 2013 by Anonymous

chemistry203
Determine the equilibrium constant for the following reaaction at 298K. SO3(g)+J2O(g)->H2SO4(l); delta G = -90.5
April 13, 2013 by sue

Chemistry
Calculate the equilibrium constant for the following reaction at room temperature, 25 ∘C: N2(g)+O2(g)→2NO(g)
June 21, 2013 by dave

Chemistry
Write the equilibrium constant expression for each of the following reactions: A. 4NO(g)+2O^2 <--> 2N^2O^4(g) B. 2NO(g)+ Br^2(g) <--> 2NOBr(g) C. CO(g)+ 2H^2(g) <--> CH^3OH(g) D. SO^2(g) + NO^2(g) <--> SO^3(g) + NO(g)
May 5, 2014 by Andrew

chemistry
The concentration of HNO3 in a solution is 3.50 10-6 M. What is the [H3O+] in the solution? _______M What is the [OH-] in the solution? ________ M What is the pH of the solution? What is the pOH of the solution?
December 21, 2010 by jim

Differential Equations
Consider the spring - mass system, shown in Figure 4.2.4. consisting of two unit masses suspended from springs with spring constants 3 and 2, respectively. Assume that there is no damping in the system. Show that the displacements u1, and u2 of the masses from their respective...
May 13, 2014 by Daoine

Chemistry
Hydrogen Fluoride is produced from the reaction of calicum fluoride are reacted with an excess of sulfuric acid. How much hydrogen fluoride is formed if the percent yield is 93.0%?
February 28, 2011 by Toni Jones

ECONOMICS
How is the equilibrium price determined? My Answer: Equilibrium price is determined by demand and supply. How do shifts in equilibrium price occur? MY ANSWER: ???????
April 25, 2012 by Anonymous

Chemistry-Please help
A solution contains one or more of the following ions: Hg2 2+,Ba2+ ,Fe2+ and . When potassium chloride is added to the solution, a precipitate forms. The precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. When ...
October 5, 2009 by Rose

Chemistry
At a particular temperature, K=3.75 for the following reaction. SO2(g) + NO2(g) (reversible arrows) SO3(g) + NO(g) If all four gases had initial concentrations of 0.500 M, calculate the equilibrium concentrations of the gases. K=(.5+x)^2/(.5-x^2) solve for x I will be happy to...
July 30, 2007 by Taasha

Organic Chem
1. what is the monomeric unit of a chain of molecules joined by peptide bonds? Is the answer glycine? 2. Write the equation for the addition of hydrochloric acid to ethene. What is the name of the product formed? C2H4 + HCl -------> ??? Any help with any of these two ...
January 26, 2011 by John

Chemistry- please check my work
Question: The following equilibrium was studied by analyzing the equilibrium mixture for the amount of HCL produced. LaCl3(s)+ H2O(g) goes to LaOCl(s)+2HCl(g). A vessel whose volume was 1.25L was filled with 0.0125 mol of lanthanum (III)chloride and 0.0250 mol H2O. After the ...
February 25, 2009 by eliz

chemistry
Enthalpy and Entropy in Reactions and Solutions Introduction In the course of most physical processes and chemical reactions there is a change in energy. In chemistry what is normally measured is H (enthalpy change), the change in heat at constant pressure and ignoring any ...
November 30, 2010 by allison

AP CHEMISTRY
A)In a chemical reaction two gases combine to form a solid. What do you expect for the sign of ΔS? B) For which of the following processes does the entropy of the system increase? (Select all that apply.) -> alignment of iron filings in a magnetic field -> the ...
March 19, 2012 by HELP PLEASE

Science Help!
Which reaction is exothermic? A. Cellular respiration B. Photosythesis C. Baking soda+ vinegar D. Melting ice Is the answer A?
November 12, 2014 by Callie

Chemistry
Methanol, CH3OH, is produced on an industrial scale from carbon monoxide and hydrogen. At the temperatures used, gaseous methanol is formed according to the following thermochemical equation: CO(g)+ 2H2(g) <---> CH3OH(g) £H = -90Kj 1. State Le Chateliers principle and ...
March 2, 2007 by Adam

Chemistry
A chemist wants to prepare phosgene, COCl2, by the following reaction: CO(g) + Cl2(g) COCl2(g) He places 2.60 g of chlorine, Cl2, and an equal molar amount of carbon monoxide, CO, into a 10.00 L reaction vessel at 395 °C. After the reaction comes to equilibrium, he adds ...
August 3, 2014 by Nina

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-DrBob222
What would the pH value for grapefruit juice be? >7, 7, <7 It wouldn't be 7 because its not neutral, it wouldn't be greater than 7 because that's considered to be basic, I think it would be less than seven because it has acid in it. So it would be <7?
October 12, 2010 by Anonymous

science
magnesium oxide reacts with phosphoric, H3PO4 TO PRODUCE MAGNESIUM PHOSPHATE AND WATER. HOW MANY GRAMS OF MAGNESIUM OXIDE ARE REQUIRED TO REACT COMPLETELY WITH 33.5G OF PHOSPORIC ACID?
November 1, 2014 by obuchi

ionic or covalent
can you check for me? Calcium Chloride: covalent Citric Acid: ionic Phenyl Salicylate: covalent Potassium Iodide: ionic Sodium Chloride: covalent Sucrose: ionic Thanks so much!!!! You must have some reason for picking ionic or covalent. How did you arrive at your answers? Look...
June 19, 2006 by Hodgkin

Chemistry
A solution of hydrogen peroxide, H2O2, is titrated with potassium permanganate, KMnO4, according to the following equation: 5H2O2 + 2KMnO4 + 3H2SO4 = 5O2 + 2MnSO4 + 8H2O + K2SO4. It requires 46.0 mL of 0.145 Mol/L KMnO4 to titrate 50.0 mL of the solution of H2O2. What is the ...
July 3, 2014 by Brett

Chemistry
A solution of hydrogen peroxide, H2O2, is titrated with potassium permanganate, KMnO4, according to the following equation: 5H2O2 + 2KMnO4 + 3H2SO4 = 5O2 + 2MnSO4 + 8H2O + K2SO4. It requires 46.0 mL of 0.145 Mol/L KMnO4 to titrate 50.0 mL of the solution of H2O2. What is the ...
July 3, 2014 by Dan

chemistry
Can you help me write and balance this equation. I also have to include the physical states. Question: When manganese(Mn)is put into dissolved hydrochloric acid(HCl)it produces solid manganese(III)chloride (MnCl3) plus hydrogen. Thanks :)
January 24, 2008 by Miley

Org. Chem.
If n-butyl alcohol, sodium bromide, water, and concentrated sulfuric acid (cooled in ice bath while adding H2SO4) are placed in a flask and refluxed, what are the formulas of the salts that precipitate when the reaction mixture is cooled?
December 1, 2009 by CMM

chemistry-please someone answer...i am clueless
When a monoprotic weak acid is titrated with a strong base, the titration curve contains these many inflection points: a.zero b.one c.two d.three Can you also explain why you choose your answer to this question...thanks
March 25, 2010 by josh

chemistry 101
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 10-3 g of H2SO4 per liter?
July 8, 2011 by ABCD

Chem Lab Help
Separation and purification A mixture of benzoic acid, benzaldehyde and butylamine. What kind of experiment should you design to obtain each of the three compounds in a pure state. Just need ideas in order to start this experimental design. Thanks!!!
October 6, 2014 by Tom

Chemistry
Show the mechanism that illustrates the following reaction. 1-methyl-1-methanol-cyclopentane + acid -> 1-methyl-cyclohexene So, there is an elimination reaction, *AND* the carbon ring grows from a five carbon ring to a six carbon ring. (I hope my IUPAC name for 1-methyl-1-...
June 6, 2008 by chemstudent

chemistry
A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...
July 14, 2012 by aa

chem
which of the following is a chemical reaction? A) propane forms a flame and emits heat as it burns. B) Acetone feels cold as it evaporates from the skin. C) Bubbling is observed when potassium carbonate and hydrochloric acid solutions are mixed. D) Heat is felt when a warm ...
February 20, 2007 by Jenn

science
The molecular structures of two ‘penicillin-like’ compounds, A and B. in the compound A the C-C-N ring is intentionally bold, as is the C-C-C-C-N ring in compound B. By comparing these structures assess which of A and B, might be (i) more active than penicillin against ...
June 29, 2007 by sarah

Chemistry
If the pH of a solution is 6, what are the hydrogen- and hydroxide-ion concentrations? The PH of a 0.1 M MCl (M+ is an unknown cation) was found to be 4.7. Write the net ionic equation for the hydrolysis of M+ and its corresponding equilibrium expression Kb. Calculate the ...
February 19, 2013 by Jefferson

managerial economics
Suppose the inverse market demand equation is P = 80 ¡V 4(QA+QB), where QA is the output of firm A and QB is the output of firm B, and both firms have a constant marginal constant of $4. (a)Write down the Bertrand equilibrium prices for this market. (b)Calculate the industry ...
September 7, 2008 by jenny

Chemistry(Please help!!)
For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...
October 23, 2011 by Hannah

Managerial Economics
The following relations describe the supply and demand for posters. Qd = 65,000 – 10,000 P Qs = -35,000 + 15,000P Where Q is the quantity and P is the price of a poster, in dollars. a. Complete the following table. Price Qs Qd Surplus or Shortage $6.00 5.00 4.00 3.00 2.00 1.00...
October 8, 2007 by Eric

Economics
This is about economic solution.There are 2 regions but they were given by different each other function of demand and supply.1.First question is we won't sell these products on both regions and you can't transport the product each other.So please find the equilibrium price,...
October 9, 2011 by Bayarbold

chemistry
a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete, unreacted aluminum ...
March 3, 2014 by Anonymous

chemistry
0.35 grams of an unknown solid containing magnesium hydroxide is combined with 50 mL of 0.25M nitric acid. If 34.5mL of 0.1 NaOH was required to reach an endpoint, determine the concentration of magnesium hydroxide inthe sample.
November 17, 2010 by Steve

Chemistry
Earl N. Meyer found that it took 25.46mL of the 0.0100 M NaOH to reach the firtst equivalence point for the titration of 25.00mL of Zlot cola. What is the molar concentration of phosphoric acid in Zlot cola?
April 10, 2011 by Anonymous

chemistry
Nickel2 sulfate is produced when elemental nickel metal is dissolved in sulfuric acid to make nickel2 sulfate. Hydrogen gas is also released in the process. what is the balanced equation for this chemical reaction?
April 25, 2011 by chemdumby

Chemistry
I am stumped on this one...Please help!!! Write a balanced base ionization reaction for methylamine (CH3NH2) in water. Identify all species as acids and bases and identify the conjuate acid-base pairs.
November 19, 2011 by Nathan

Orgo
What volume of 1.20 M nitric acid is needed to convert 5.5g of m-chlorophenol to 3-chloro-2,6-dinitrophenol? I So far I have converted the 5.5g chlorophenol to mols and I got .043 mol. I know Volume * Molarity (1.2M)=moles. At this point I am stuck.
February 24, 2012 by Sam

chemistry
What is usually indicated by an -ite or -ate ending in a chemical formula? A. The compound carries a net ionic charge of zero. B. The compound contains a polyatomic ion. C. The compound is an acid. D. The compound is molecular. I think A
November 10, 2012 by shana

Genetics
A portion of alcohol dehydrogenase enzyme contains 375 amino acids. Including both amino acid and all other necessary codes, how long is the coding portion of the corresponding mRNA? Thanks
November 16, 2014 by Mandy

chem
hydrogen gas can be produced in the laboratory through the reaction of magnesium metal with hydrochloric acid: mg(s)+2hcl(aq)→mgcl2(aq)+h2(g) when 21.0g of mg reacts, what volume, in liters, of h2 gas is produced at 20∘c and 760 mmhg ?
November 17, 2014 by bianca Barbosa

economics
Assume that the equation for demand for bread at a small bakery is Qd = 60 - 10Pb + 3Y, where Qd is the quantity of bread demanded in loaves, Pb is the price of bread in dollars per loaf, and Y is the average income in the town in thousands of dollars. Assume also that the ...
September 18, 2012 by Jackie

chemistry
have my results from a simple titration experiment (sodium carbonate against hydrochloric acid) Average titre of 53.27 cm3 which i am happy with but how can i state that my results are accurate and how can i convince my lecturer my results are reproducable? Thanks very much.
October 18, 2010 by paul m

chemistry
A 49.45 mL sample of solution containing Fe2+ ions is titrated with a 0.0103 M KMnO4 solution. It required 23.76 mL of KMnO4 solution to oxidize all the Fe2+ ions to Fe3+ by the following reaction. MnO4-(aq) + Fe2+(aq) Mn2+(aq) + Fe3+(aq) (unbalanced) (a) What was the ...
October 28, 2010 by Anonymous

American History
---- TRUE of FAlSE??/ 1. The Allies had the upper hand against the Japanese in the Pacific during all of 1942. ------------my answer: True?? ** what does upper hand mean? i dont quite getr the meaning of the question. 2. The Soviet Union established several satellite nations ...
April 29, 2008 by CM

Chemistry
At 22C(Celsius) an excess amount of a generic metal hydroxide M(OH)2 is mixed with pure water. The resulting equilibrium solution has a pH of 10.14. What is the Ksp of the salt at 22C? Help Please
November 14, 2012 by Anonymous

Chem
A 0.170-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
December 5, 2013 by Mandy

chemistry
Halogen acid gas evolution the level of HCL evolved percent by weight .Test result 2mg/g the sample weight 0.65 gram calculat the percent by weight.
December 18, 2010 by Ram khilavan

History
The impact of increased discrimination and segregation practices between 1876 and 1900 in the District. Be sure to describe how this discrimination and segregation diminished social, economic, and political gains which were enjoyed by black Washingtonians immediately after the...
June 9, 2010 by Paul

College Chemistry 2 - Equilibrium Constants/Conc.
The equilibrium constant for the reaction is 37 at a certain temperature. 2H2(g) + CO(g)<==> CH3OH(g) If there are .0293 moles of H2 and .00353 moles of CH3OH at equilibrium in a 4.53-L flask, what is the concentration of CO? .....So far I have found: H2= .0293/4.53= ....
March 4, 2011 by Raeyna

Chemistry Titration Lab HELP!
Hi everyone! I just got a new lab that I MUST complete today, and it's about titration- I have absolutely no clue how to do it, it just doesn't make sense to me! I hope that someone can help explain to me how to do it so I can finish ASAP!! Thanks a lot, -Angel Lab--Titrations...
June 11, 2008 by Angel

chemistry
In a volumetric analysis experiment, a solution of sodium oxalate (Na2C2O4) n acidic solution is titrated with a solution of potassium permanganate (KMnO4) according to the following balanced chemical equation: 2KMnO4(aq)+8H2SO4(aq)+5Na2C2O4(aq)-> 2MnSO4(aq)+8H2O(l)+CO(g)=...
November 17, 2014 by Monteshia

Chemistry (3rd time I've posted this)
Can someone check my answers? I've posted this a couple times and no one has responded. Is no one responding because they're all right or what? 1.) If you were involved in an acid rain monitoring project with several other samplers, why would it be important that all of you ...
March 21, 2007 by Joe

Chemistry
0.25mol of CO are mixed with 0.90mol of H2 and heated to 950 degrees celcius in a 15L flask at equilibrium 0.190mol of H2O were present, what is the concentration of the other reactants and products at equilibrium and what is Kc
March 16, 2013 by Elena

please help w/ chem hw
An equilibrium mixture at 225∘C contains 8.0×10−2M NH3 and 0.20M H2 for the reaction 3H2(g)+N2(g)←→2NH3(g) If the Kc at this temperature is 1.7×102, what is the equilibrium concentration of N2?
July 28, 2013 by Anonymous

AP Chemistry
Write the balanced molecular, complete ionic, and net ionic equations for each of the following acid-base reactions. (Type your answer using the format [NH4]+ for NH4+ and [Ni(CN)4]2- for Ni(CN)42-. Use the lowest possible coefficients.) (a) HClO4(aq) + Mg(OH)2(s) molecular ...
September 24, 2011 by Rahul

math
Can anyone help me with dq i week 2Post your response to the following: How do you know if a value is a solution for an inequality? How is this different from determining if a value is a solution to an equation? If you replace the equal sign of an equation with an inequality ...
July 29, 2010 by Norma

Chemistry
Write half-reactions for the oxidation and reduction processes for the following: Sn2+ + IO3- -> Sn4+ + I- (acidic solution) MN2+ + H2O2 -> MnO2 + H2O (basic solution)
May 26, 2010 by Mary

algebra
solve the following systwm graphically. Be sure to check your solution. if the system has an infinite number of solutions, use set-builder notation to write no solution, state this. 4y=x+8, x=2/3y+2
July 9, 2014 by jessica

chemistry
How many milliliters of a 0.200 M HI solution are needed to reduce 21.5 mL of a 0.365 M KMnO4 solution according to the following equation: 10HI+2KMnO4+3H2SO4 ---> 5I2+ 2MnSO4 +K2SO4+ 8H2O
October 18, 2014 by Kayla

Benelux Economic Union
When was the Benelux Economic Union established and what was its sole purpose? Online Content Assignment Using the sites listed on the left, please answer the questions below in complete sentences. The site reference is provided in parentheses at the end of each question. ...
April 12, 2012 by ♥rebel•stupidity=kathy

chemistry
a chemist puts 6 moles of nitrogen gas and 7 moles hydrogen gas into an evacuated 1 liter container. The system reaches equilibrium at a certain temperature according to the process outlined above. when the system is at equilibrium the chemist determines the ammonia ...
November 14, 2012 by hannah

Chemistry
We conducted a lab with antacids in class the other day and i'm having trouble doing the calculations. Well we basically took antacid tablets dissolved them in HCl, heated it and then added phenolthalien and then titrated until we saw a pink color. At 41mL we saw the pink and ...
March 15, 2010 by Anonymous

Chemistry
Suppose that we had used 25.5cm3 of 0.200M NaOH and 42cm3 of dilute HCl to reach the end point. What is the molarity of the Hcl acid? HCl = NaOh--> NaCl + H20
March 15, 2010 by Anonymous

Chemistry
When zinc, iron and lead are reacted with hydrochloric acid the variable most easily measured in order to determine the effect of the chemical nature of the reactants on reaction rate is a)temperature b)colour c)surface area d)volume of gas e)concentration Think it's d. Am i ...
July 24, 2010 by Bob

science
I have checked these sites out and they dont answer the question, what molecules is lipitor composed of. I just need to know its its a carbohydrate, protein, amino acid. One site said something about statin but im not sure if that is a molecule. someone who knows please help ...
February 4, 2011 by rainy

chemistry
I need help with this question please help, I just don't understand it Fe3+ (aq), Ca2+ (aq) and Ba2+ are all present in the same solution. Fully describe a procedure whereby you could separate these ions from one another Mr Pursley posted this response, but I don't understand...
November 13, 2011 by Kali

Chemistry
Use the data in Table 15.3 to calculate the equilibrium constant for the following reaction: HCOOH(aq) + OH(aq) <-->HCOO(aq) + H2O(l)
March 10, 2011 by vichka

Chemistry
Solve an equilibrium problem (using an ICE table) to calculate the of each of the following solutions. .16M CH3NH3Cl
March 30, 2013 by Dillon

chem
if a 10cm cube pipette were not available, which one of the following would be the best way of measuring a 10cm cube portion of a solution? a. weigh 10 times the mass of 1cm cube of the solution. b. weigh 10g of the solution. I think this is a trick question. There seems to be...
December 22, 2006 by minerva

chemistry
RE: Le Chatelier's principle. this was the whole question i was given. Write a short account of around 250 words in total, with reference to Le Chatelier’s principle, in which you explain the following: (i) The effect on the equilibrium yield of nitric oxide of increasing the ...
January 28, 2009 by trigger

history
Which of the following is not a reason there was a rowing spirit of nationalism in africa foloowing world war 2? A. African soliders who had fought parts of the world returned home disturbed by africas discrimination. B. Workers in war time defense industrys went on strike ...
January 6, 2012 by sarah

CHEMISTRY HELP NEEDED A.S.A.P
Given: N2O4 (g) « 2NO2 (g) @ 25 degrees celcius, Kc is 5.84 x 10^-3. (A) Calculate the equilibrium concentrations of both gases when 4.00 grams of N2O4 is placed in a 2.00 L flask at 25 degrees celcius. (B) What will be the new equilibrium concentrations if the volume of the ...
April 22, 2010 by Frank

chemistry; acids and bases
Since Ka x Kb = Kw, is the conjugate base of a weak acid a weak base or a strong base?
April 26, 2010 by Diem

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

CHEM
Show that when pH = pKa, the maximum buffer capacity (at 298.15 K) is given by: âmax = 0.576C where C is the total concentration of conjugate acid and conjugate base. The first two terms in the brackets on the right hand side of equation (8.5) can be neglected. B( KaCH/(Ka +H...
July 18, 2008 by JOE

Chemistry
compare and contrast the reactivity of the organometallic reagents R2Cd, RLi, R2CuLi, RMgBr, RZnBr with respect to ethyl chloride, ethanoic acid and 2-cyclohexen-1-one im not really sure what its asking and i dont know how they react differently determines their reactivity ...
November 2, 2009 by Lucy

organic chemistry
what could be possible answers to these two questions.....1 why determine the amount of solvent by difference and not by weighing the final distillate????? why not distill off all the solvent at the very beginnig and then separate the solid residue of benzoic acid and benzoin ...
November 19, 2010 by Davia

chemistry
Predict the products and then write the complete balanced chemical equation with states of matter: 1. Sulfuric Acid and sodium hydroxide 2. Aluminum and copper (II) sulfate 3. Silver nitrate and iron (III) chloride 4. Magnesium heated 5. Aluminum oxide
February 8, 2011 by Graham

Chemistry(Please check)
Last question, I just want to make sure I understand the concept of hybridization. For carboxylic acid the hybridization is: CH3= sp3 because there are only single bonds COOH= Sp2 because the oxygen is double bonded to the C Is this correct? Thank you for checking my work!
September 12, 2012 by Hannah

chemistry
How many compounds would there be in a combinatorial library of ester compounds made from every isomer of monofluorobenzoic acid and every possible alkyl alcohol with 4 or less carbon atoms? 1. 11 2. 24 3.12 4.21 i know its either 21 or 24 but im not sure :S can someone help ...
February 18, 2010 by Myra

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