Friday
August 29, 2014

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

Number of results: 55,940

Chemistry
Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement. Pka1= 2.12
November 29, 2013 by Daniel

Chemistry
My question is ..can anyone explain how to do problem #2? I feel lost. :( And could you also explain why? Problem#1, is that a regular dG = dH - TdS problem? Then using Go = -RTlnK to find K? Im just afraid if there are other seps to it.. 1. The combustion of butane has the ...
April 6, 2014 by Lynn

Chem
At 850 C, the equilibrium constant Kp for the reaction: C(s)+CO2(g) >< 2CO(g) has a value of 10.7. If the total pressure in the system at equilibrium is 1.000 atm, what is the partial pressure of carbon monoxide.
April 22, 2009 by Noemi

chem
Reaction H2 +I2 yields 2HI All three gases are initially at 0.1atm/ upon reaching equilibrium it is found that H2 pressure droped by 55% what is the equilibrium constant for this reaction.
December 26, 2010 by Anonymous

College Chemistry
The equilibrium constant Kc for the reaction N2(g) + 3H2(g) -> <- 2NH3 at 450 degrees celcius is 0.159. Calculate the equilibrium compostion when 1.00 mol N2 is mixed with 3.00 mol H2 in a 5.00-L vessel.
March 7, 2011 by Anonymous

economics
Select a product and for that the government places a mandated price ABOVE the equilibrium price, based on your research how would this affect the market equilibrium, explain your view.
January 17, 2013 by judy

Chem for final, please help!
How many moles of H+(aq) ions are present in 1.25 L of 0.75M Nitric Acid? A. 0.60 mol B. 0.75 mol C. 0.94 mol D. 1.7 mol E. 1.9 mol Please show me how to work this!
December 7, 2010 by lavonne

statistics
It appears to people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, minutes of activity varied according to the N(373,67) distribution. Minutes...
September 12, 2011 by Darcy

Chemistry
Hello! I am having a little difficulty answering these two questions on my homework, I was wondering if anyone could please help me out! Thank you! 1) Consider the following balanced chemical equation for the neutralization reaction of calcium hydroxide with hydrochloric acid ...
November 30, 2013 by T.C.

Chemistry
Phenolphthalein is an indicator that changes colour to pink/purple between pH 8-->10, however, neutralization occurs when pH=7. Why can phenolphthalein still be used as the indicator during a strong acid-strong base titration with virtually no error?
December 12, 2007 by Lucy

Chemistry
What type of reaction may be occurring when a person's skin develops a green stain beneath a 14 K gold bracelet? Using HA as the chemical formula for acid in skin, write a balanced chemical equation to represent the reaction.
March 7, 2009 by Lucy

College - Chemistry
Given that delta Hrxn for OH- ions is -22.9 kJ/mol, calculate the enthalpy of neutralization when I mole of a strong monoprotic acid (such as HCl) is titrated by 1 mole of a strong base (such as KOH) at 25-degrees C.
October 22, 2010 by Mint

chemistry
copper metal reacts with nitric acid. assume that the reaction is 3Cu(s) + 8HNO3(aq) > 3Cu(NO3)2(aq) + 2NO(g) + 4H2O(l). if 5.58 grams of Cu(NO3)2 is obtained, how many grams of nitrogen monoxide would have formed
October 12, 2012 by robert

CHEMISTRY
CaCO3(s)+2HCl(aq)>CaCl2(aq)+H2O(l)+CO2(g) how many grams of calcium chloride will be produced when 30 g of calcium carbonate are combined with 13 g of hydrochloric acid? Which reactant is in excess and how many grams of this reactant will remain after the reaction is complete?
March 20, 2014 by YOLANDA

CHEMISTRY
Dye of iodine is prepared by dissolving in ethanol , and 1% ( one percent ) of this solution contains 10 g of solute in 1000 g of solution 1) how many grams of solvent is there in the solution ? 2) how many moles of solute ( I2) is there? 3) what is the molality of 1% of this ...
July 12, 2014 by MAD

chemistry
The correct interpretation of the equation below is:? Fe3+(aq) + SCNC(aq) FeSCN2+(aq) A. The reaction is incomplete because the product is still charged. B. A heterogeneous equilibrium exists because of the charged ions. C. The equilibrium constant is Kc = [Fe3+][SCNC][...
April 10, 2008 by david

Chemistry
Nitrate salts containing metal ions with the following electron configurations are added to water to make a solution. Predict whether the salt solution will be colored or colorless and explain the reasoning. a. [Kr]4d10 b. [Ar]3d3
November 19, 2013 by Anonymous

Chemistry-help needed
Concentrated sulphuric acid and manganese(IV) oxide were added to the solid. On warming a gas was evolved which turned litmus colourless. The answer is that Cl2 gas was evolved and chloride ion is present. Can you please explain the reaction that took place?
February 2, 2009 by Janice

Chemistry
Deduce the anion present in the salt. Assume that the reagent is added to simple salt: - Test: - Concentrated sulphuric acid and manganese(IV) oxide were added to the solid. On warming, a gas was evolved. It turned litmus colourless. Is there something wrong with the question?
February 2, 2009 by janice

Chemistry
Write an equation for the reaction between the Bronsted-Lowry acid HOCl(aq) reacting with base CO32-(aq) I am having difficulty with this question. Here is what i have so far but I know i went wrong somewhere. HOCl (aq) + CO32-(aq) --> HCO3-(aq) + OCl(aq) Any help would be ...
March 2, 2010 by Matthew

chemistry
How can I group white substances into 2 groups according to their properties&list the properties of each group? Calcium carbonate, citric acid, sucrose, Phenyl salicylate, Potassium iodide,and Sodium chloride Also, which of them dissolves in water and which has solubility in ...
February 2, 2012 by Jessica

chemistry
How can I group white substances into 2 groups according to their properties&list the properties of each group? Calcium carbonate, citric acid, sucrose, Phenyl salicylate, Potassium iodide,and Sodium chloride Also, which of them dissolves in water and which has solubility in ...
February 2, 2012 by Jessica

College General Chemistry
How would you prepare each of the following solutions? a. 100mL of a 155ppm solution of urea, CH4N2O, in water. b.100mL of an aquaneous solution whose K+ concentration is 0.075M
January 31, 2011 by DONDON

chemistry
A salt solution can be acidic, basic, or neutral. when dissolved in water, which of the following salts will make the solution basic: KCl, FeCl3, NaNO3, CaCO3, LiF, and NH4Br?
April 17, 2011 by max

algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) 0
March 28, 2014 by james

algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) 0
March 29, 2014 by james

Physical Chemistry
A total charge of 97.4 kC passes through an electrolytic cell. Determine the quantity of substance produced in each of the following cases. (a) the mass (in grams) of silver metal from a silver nitrate solution ?g (b) the volume (in liters at 273 K and 1.00 atm) of chlorine ...
March 29, 2010 by Mark

Science
The Keq for the equilibrium below is 5.4 1013 at 480.0 C. 2NO (g) + O2 (g) ↔ 2NO2 (g) What is the value of Keq at this temperature for the following reaction? NO2 (g) ↔ NO (g) + 1/2 O2 (g) The Keq for the equilibrium below is 5.4 1013 at 480.0 C. 2NO (g) + O2...
March 19, 2013 by DrewS

Chemistry
The Keq for the equilibrium below is 5.4 1013 at 480.0 C. 2NO (g) + O2 (g) ↔ 2NO2 (g) What is the value of Keq at this temperature for the following reaction? NO2 (g) ↔ NO (g) + 1/2 O2 (g) The Keq for the equilibrium below is 5.4 1013 at 480.0 C. 2NO (g) + O2...
March 19, 2013 by DrewS

Chemistry
K=1.6x10^-5 mol/L for the following reaction 2NOCl(g).... 2 NO(g) + Cl2(g) Calculate the concentrations of all species at equilibrium for each of the following original mixtures E) 2.4 mol of NOCl, 2.4 mol of NO, and 1.2 mol Cl2 in a 1.0 L flask F)1.9 mol/L concentration of ...
November 20, 2007 by AMANDA

chemistry
Liquid Nitrogen tetroxide, N2O4(l), was used as a fuel in Apollo missions to the moon. In a closed container the gas N2O4(g) decomposes to nitrogen dioxide, NO2(g). The equilibrium constant,k, for this reaction is 0.87 at 55 degrees Celsius. A vessel filled with N2O4(g) at ...
April 3, 2008 by Claus

Chemistry
Write the equilibrium constant expression, K, for each of the following reactions. Where appropriate, designate the K as Ksp. 2H2(g) + O2(g)<-->2H2O(g) 2Hg(l) + Cl2(g) <-->Hg2Cl2(s)
November 14, 2011 by Kevin

Chemistry
Consider the following equilibrium at 395K: NH4HS(s) <--> NH3(g) + H2S(g) The partial pressure of each gas is 0.265 atm. Calculate Kc for the reaction
January 4, 2013 by Cami

Chemistry
Consider the following equilibrium at 395K: NH4HS(s)<-> NH3(g) + H2S(g) The partial pressure of each gas is 0.265 atm. Calculate Kc for the reaction.
February 19, 2013 by Susan

chemistry
which of the following would be expected to have the lowest freezing temperature? a. Ca(NO3)2 b. NaC2H3O2 c. CuSO4 d. HC2H3O2 e. C2H5OH per what? per gram? per mol? Any could have the lowest freezing point if I put a cup of any one and a scant amount of the others. For equal ...
April 21, 2007 by mary

MATH
Which of the following equations has the given solution set? Solution set: A)-2m + 5 = 2m + 5 B)-2m + 5 = -2m + 5 C)-2m + 5 = -2m - 5 D)none
March 5, 2010 by nicky

Chemistry
Determine the pH of each of the following solution. a solution that is 5.810^−2 M in HClO4 and 2.610^−2 M in HCl
March 21, 2010 by Kyle

Chemistry
I had to perform an experiment for rate of reaction. The point of the experiment was to show how changes in reactant concentration, temperature, and catalyst presence can affect the rate of a reaction. The reaction that we studied was H2O2 + 2I^- + 2H^+ -> I2 + 2H2O We had ...
February 25, 2012 by Hannah

Chemistry
2H2 (g) + O2 (g) <---> 2H2O (g) what is the likely magnitude of the equilibrium constant? a) k < 10 ^-3 b) 10^-3<K<10^3 c)k=0 d)k>10^3 i know that choice c is incorrect because if k=o there would be no need to calculate equilibrium, but how would i go about ...
March 11, 2010 by Katie

Chemsitry
At 25 C, only 1.9 g CaSO4 (MM = 136 g/mol) will dissolve in 2.00 L of water. Write the equilibrium expression and calculate the equilibrium constant for the reaction below. CaSO4 (s) ⇋ Ca2+ (aq) + SO42- (aq)
June 13, 2010 by Michelle

Chemistry
when Fe(NO3)3 and KNCS were mixed they reacted together to establish an equilibrium with FE(NCS)+2. what are the changes in terms of quotient Q when the solutions were just mixed (no reaction), to the point where equilibrium is reached.
October 31, 2010 by LP

Chemistry
At 1473K the equilibrium constant for the reaction H2(g) + Cl2(g) <--------> 2HCl(g) Kc = 2.5*10^4. What would be the equilibrium concentration of HCL if the initial concentrations of H2 and Cl2 were 0.1840M and 0.1918M. I got 29.7 but was told it was wrong
March 12, 2011 by Jude

chemistry
how can the purity of water be established?
April 30, 2009 by michael

economics
why was the federal reserve established ?
February 15, 2011 by angelica

chemistry
Record measured absorbance for each tube in following table. Complete the table by calculating the [ Fe(SCN2+)]eq and [Fe3+]initial and [HSCN]initial Data: Volume of 2.00 x 10-3 M Fe(NO3)3 solution, mL 1)5.00, 2) 5.00, 3) 5.00 4) 5.00 5) 5.00 Volume of 2.00 x 10-3 M HSCN ...
September 27, 2012 by Brittany S

chemistry
Record measured absorbance for each tube in following table. Complete the table by calculating the [ Fe(SCN2+)]eq and [Fe3+]initial and [HSCN]initial Data: Volume of 2.00 x 10-3 M Fe(NO3)3 solution, mL 1)5.00, 2) 5.00, 3) 5.00 4) 5.00 5) 5.00 Volume of 2.00 x 10-3 M HSCN ...
September 27, 2012 by Brittany S

Chem Class
The equilibrium constant for reaction 1 is K.....? how do i figure out problems like this? do i check which ones cancel out? The equilibrium constant for reaction 1 is K. The equilibrium constant for reaction 2 is ___? (1) SO2 (g) + (1/2) O2 (g) (right and left arrows)SO3 (g...
October 25, 2010 by Awr

Biology!!
Darwin is considered the "father of evolutionary biology." Four of his contributions to the field of evolutionary biology are listed below. The nonconstancy of species. Branching evolution, which impleies the common descent of all species. occurrence of gradual changes in ...
January 16, 2011 by Mary

equilibrium constant (Kp)
What is the equilibrium constant "Kp" at 200 C for the reaction below: P4(s) + 6 Cl2(g) --><-- 4 PCL3(l) Given the following at 200 C P4(s)+ 10 Cl2(g) --><-- 4 PCl5(s) Kc=8.12 PCl3(l)+ Cl2(g) --><-- PCl5(s) Kc=0.771 Answer: 6.7*[10^(-9)] not sure what to do. ...
July 20, 2011 by k

Chemistry
Sally Scientist is trying to determine Avogadro's number using a procedure analogous to that in Experiment 4. She fills a watchglass with diameter 11.9 cm with water and is trying to create a monolayer of stearic acid on the top of the water. What is the area of the water ...
February 7, 2010 by Mindy

chemistry
Consider the formation of cyanogen c2n2 and its subsequent decomposition in water given by the equations 2Cu2+ + 6CN- 2[Cu(CN)2]- + C2N2 C2N2 + H2O HCN + HOCN How much hydrocyanic acid HCN can be produced from 35.00 g of KCN, assuming 100% yield?
October 19, 2012 by Arik

chemistry
Take a cup of water, add sugar, and stir. If the resulting solution contains sugar crystals that do not dissolve, the solution is said to be? a)an unsaturated solution b)a saturated solution c)a homogeneous solution d)none of the above Is it d - supersaturated
July 23, 2010 by Thelma

Economics (Cournot Equilibrium)
If market demand is P = 100 - Q and MC is 40, what is the Cournot Equilibrium for N firms?
September 20, 2008 by Bob

Chemistry
A reaction is said to be diffusion controlled when it occurs as fast as the reactants diffuse through the solution. The following is an example of a diffusion controlled reaction. The rate constant for this reaction is 1.4x1011 M-1s-1 at 25oC and the reaction obeys the ...
May 19, 2009 by Kevin

chemistry
Consider the equilibrium, A + B <--> C, with K=32.217 and initial concentrations of A,B, and C, of 3.665M, 0.883M, and 3.925M, respectively. What is the equilibrium concentration of B 3.665 0.883 3.925 A + B = C Keq=(C)/(A)*(B)= 32.217 Q = (3.025)/(3.665)*(0.883)=1.21 Q...
February 7, 2007 by Rob

Solving two step equations
1) Which of the following is a solution to the equation y=3x-1? (4,1)*** (2,5) (4,3) (0,-3) 2) Which equation represents the pattern in the table below? (Sals and Carries Ages) Sal 3 5 8 13 15 Carrie 7 9 12 17 19 S=c+4*** S=4c C=s+4 C+4s 3) Solve. 1/3x=12 X=4 ...
September 23, 2013 by Gabby

chem ap
please tell me if i am correct a buffer is made using HF and NaF-with a pH of 3.00. compute the ratio of the conjugate base F- to weak acid HF. I previously found Ka of HF which is 7.2x10^-4 and the ph of HF is 3.15. the concentration of NaF would be 1.00x10^-2 ???? and so the...
April 17, 2008 by quentin

chemistry check my work
C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? percent is 77.l1% is this correct?
April 15, 2010 by Molly

Chemistry
In the first step of the Ostwald process for the synthesis of nitric acid, ammonia is converted to nitric oxide by the high-temperature reaction:4NH3(g)+5O2(g)+6H2O(g). How is the rate of consumption of O2 related to the rate of consumption of NH3?
June 20, 2010 by Deborah

College Chemistry
Given that delta Hrxn for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when I mole of a strong monoprotic acid (such as HCl) is titrated by 1 mole of a strong base (such as KOH) at 25-degrees C.
October 26, 2010 by Alexis

Chemistry II
A storage tank containing 1.6x10^4 Liters of water is found to be contaminated with nitric acid and therefore has a pH of 3.78. Calculate the volume of 0.050 M sodium hydroxide required to be added to the tank in order to neutralize (pH = 7.0) the contaminated water.
October 3, 2011 by Wendell

chemistry homework help!!
CaCo3(s)+2HCl(aq)---->CaCl2(aq)+H2O(l)+CO2 How many grams of calcium chloride will be produced when 27.0g of calcium carbonate are combined with 14.0g of hydrochloric acid? Which reactant is in excess and how many grams of this reactant will remain after the reaction is ...
February 15, 2012 by danielle

Math
1.64g of a mixture of cac03 and mgc03 was dissolved in 50ml of 0.8M hcl. The excess of acid required 16ml of 0.25M naoh for neutralization. Calculate the percentage of cac03 and mgc03 in the sample Steve helps me step by step
December 25, 2013 by Fai

Chemistry
The equilibrium constant Kc^i is 3.2x10^-34 at 25 degrees C for 2HCl(g) -> H2(g) + Cl2 (g). The equilibrium constant Kc^ii is .10 at 25 degrees C for 2ICl (g) -> Cl2 (g) + I2 (g). a) Calculate the equilibrium constant Kc for the reaction below at 25 C Cl2(g) + I2 (g) -&...
March 13, 2014 by Lily

Chemistry 12
name a compound that acts as a weak base? methanol? define the term weak bronsted-lowry base im not sure how to put this in words, but a weak base is found when you got a strong acid, when your ka is high, kb will be low.
January 25, 2013 by Shreya

Chemistry
Draw the structure of the product formed by the reaction between methyl alcohol and formic acid and give the molecular formula HCOOH + HOCH3 ==> HCOOCH3 + H2O determine this molar concentration 58g of lithium in 54-ml of water molarity = mols/L mols Li = 58/atomic mass Li...
April 12, 2007 by Kellie

Asia - JAPAN- Pollution
Hi, I have got a question about Japan's geography; In which ways has the actions of man ( people) affected Japans land? I mean like acd rain, carbon dioxide etc.( negative effects on the country) I've been googling it, but I cant find anything. Bea
May 24, 2010 by Beatrice

chemistry
which metal react most vigorously? metals aluminum, copper, magnesium, lead, tin, zinc 1. which metal will react most quickly? 2. which will take the longest time to react? 3. which will react most vigorously and least vigorously? 4. list metals from order of least to most ...
April 18, 2013 by rick

Organic CHemistry Please help me out
In the accompanying chart are appropriate vapor pressures for benzene and toluene at various temperatures: Temp (C) mmHg Temp (C) mmHg Benzene 30 120 Toluene 30 37 40 180 40 60 50 270 50 95 60 390 60 140 70 550 70 200 80 760 80 290 90 1010 90 405 100 1340 100 560 110 760 d. ...
October 17, 2013 by Aishwarya

chemistry
What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp of the reaction. ...
April 23, 2012 by Anonymous

chemistry
What is the solubility of AgCl when it is in a solution of 0.15 M NaCl? (AgCl has Ksp = 1.8 x 10-10.) Make a reaction table. Include rows for initial concentration, change in concentration, and equilibrium concentration. Write down the equation for the Ksp of the reaction. ...
May 4, 2012 by Anonymous

chemistry
Compound X is 2-propanol. When compound X is heated with a strong acid, it dehydrates to compound Y (C3H6). When compound X is oxidized, compound Z is forms which cannot be oxidized further. Draw the condensed structural formula and give the IUPAC names for compounds X, Y, AND Z.
August 11, 2013 by veronica, rena, joshua

chemistry
Compound X is 2-propanol. When compound X is heated with a strong acid, it dehydrates to compound Y (C3H6). When compound X is oxidized, compound Z is forms which cannot be oxidized further. Draw the condensed structural formula and give the IUPAC names for compounds X, Y, AND Z.
August 12, 2013 by veronica, rena, joshua

Chemistry
Consider the following chemical reaction 2HCl+Ca(OH) CaCl+2H2O you have a mixed solution with 20.00mL of 0.100M Ca(OH)2 solution What is the molarity of the HCl,Ca(OH)2 and CaCl2 after the reaction has stopped?
December 4, 2013 by Ruffles

math
A recipe for one large cake calls for 3 2/3 cups of flour. Anya has decided to increase each ingredient in the recipe by 2 1/2. How many cups of flour does she need?
March 8, 2012 by peter

accounting
The following financial data were taken from the annual financial statements of Smith corporation: 2007 2008 2009 Current assets $450,000 $400,000 $500,000 Current liabilities $390,000 $300,000 $340,000 Sales $1,450,000 $1,500,000 $1,400,000 Cost of goods sold $1,180,000 $1,...
November 18, 2010 by Sheryl

accounting
The following financial data were taken from the annual financial statements of Smith corporation: 2007 2008 2009 Current assets $450,000 $400,000 $500,000 Current liabilities $390,000 $300,000 $340,000 Sales $1,450,000 $1,500,000 $1,400,000 Cost of goods sold $1,180,000 $1,...
June 3, 2014 by yousef

Science
Harvesting energy from water, wind, and geothermal vents requires the use of (1 point) aquaculture engines*** mines turbines Which of the following is not among the advantages of generating nuclear energy? (1 point) It does not release carbon dioxide into the atmosphere. It ...
February 11, 2014 by Gabby

Science~!
Harvesting energy from water, wind, and geothermal vents requires the use of (1 point) aquaculture engines*** mines turbines Which of the following is not among the advantages of generating nuclear energy? (1 point) It does not release carbon dioxide into the atmosphere. It ...
February 11, 2014 by Gabby

Chemistry
if you double the concentration of HCL acid, will that double rate of reaction? i have to explain in terms of the theory of collision. Wont doubling the concentration double the rate as well?
September 25, 2012 by Shreya

chemistry
What are the equilibrium concentrations of H+,OH- ,(HSO3)-, (SO3)2- and Na+ in the solution that results from combining 50.0 mL of 0.200 M NaHSO3 with 50.0 mL of 0.600 M Ba(OH)2 ? Ka1 = 1.5 x 10-5 and Ka2 = 1.0 x 10-7 for H2SO3 does it matter that Ba(OH)2 has 2 OH's?When ...
August 3, 2008 by alexis

chemistry
Aluminum sulfate reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. How many grams of aluminum sulfate would be formed if 250g H2 SO4 completely react with aluminum?
December 9, 2007 by Michelle

chemistry
what is the ration of water drops to EDTA (ethylenediamene tetraacetic acid) if 3 drops of EDTA was needed to change the color of 20 drops of water with known hardness?? a. 0.15 b. 1.0 c. 4.0 d. 6.7 am I missing something huge here??
May 12, 2010 by alex

Grammer
i treid my best to make the sentnce sound good, but its still sounds funny. can you please correct this sentence for me. Thank You so much! It is not surprising that polar bears in the north are decreasing in population due to glacial deterioration nor the acid precipitation ...
February 15, 2012 by Pria

biology
i have two questions about cellular respiration that i cant get..: 1. why do you keep breating heavily for some time even after you have completed strenuous excercise? (i think this has to do with lactic acid fermentation???) 2. why do winemakers want to keep fermenting grapes...
March 3, 2009 by anonymous

Chemistry
Write the net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hydrobromic acid are combined. I know that the first part of the formula would be BaOH + HBr but I do not know what the product would be since HBr is one thing. I do not ...
October 9, 2011 by Hannah

Chemistry
At equilibrium, it was found that [CH3COOH] = 0.8537 M, [CH3COO-] = 0.0040 M, and [H3O+] = 0.0040 M. Calculate the acidity constant of CH3COOH and the pH value of the solution. - Please show how you solve the problem.
March 25, 2012 by Lisa

physics
Which of the following statements is true about a mass, which is attached to a spring and moves with simple harmonic motion on a frictionless horizontal surface? Choose one answer. a. The kinetic energy of the mass is maximum at the end positions. b. The kinetic energy of the ...
April 30, 2011 by ashley --- HELP PLEASEE!!!

Chemistry - Please Help!
XeO3 + I- ----> Xe + I2 (acidic solution) CN)2 -----> CN- + OCN- (basic solution) MnO2 + SO32- ---> Mn2+ + S2O62- (acidic solution) H2SeO3 + H2S -----> S + Se (acidic solution) Cl2 ---> Cl- + ClO3- (basic solution) ClNO2 -----> NO3- + Cl- (acidic solution)
October 27, 2013 by Brittney

Equilibrium Price
Suppose now that the invention of a better mechanical lettuce picker reduces costs. Producers are now willing to supply and quantity of lettuce for $9 less per crate than previously. What will happen to the equilibrium price of lettuce? Will it fall by th efull $9 amount? ...
September 16, 2006 by Anonymous

Chemistry
A gaseous reaction mixture contains SO2, Cl2, and SO2Cl2 in a 2 L container with the gases having the following partial pressures: P(SO2)=0.35 atm, P(SO2Cl2)=0.19 atm, P(Cl2)=0.24 atm. Kp=91 for the equilibrium system: SO2 (g) + Cl2 (g) -> SO2Cl2 (g) Is the system at ...
February 18, 2007 by Hannah

Chemistry
In a run involving 1.00 mL 2.50 * 10^-3 FE and 1.00 mL of 2.50 * 10^-3 SCN solutions made up to a total volume of 10.0 mL, the concentration of complex formed at equilibrium was found to be 4.44 * 10^-5. What are the equilibrium concentrations of Fe^3+ and SCN^-? I tried m1v1=...
February 22, 2010 by Ellie

Chemistry
If Chelcy and Allyson reacted 2.55 grams of Mg with excess hydrochloric acid (HCl), how many grams of MgCl2 will they theoretically produce? Mg(s) + HCl (aq) → H2 (g) + MgCl2 (aq) ?g MgCl2
January 31, 2013 by star

physics
Again, I know I keep posting questions but I'm begging you for help. At 25C the vapour pressure of pure pentane is 511 torr and that of hexane is 150. torr. What is the mole fraction of pentane in a pentane-hexane solution that has a vapour pressure of 339 torr at 25C? What ...
April 11, 2012 by anonymous

Language Arts...Writing
Hello, I need some help with the following question. My answer is #1, is this corret? Thank You Find the sentence with the Active Voice? #1 The chairman told me that the legislature passed the bill. #2 I was told by the chairman that the bill was passed by the legislature.
September 7, 2007 by Mandi

chemistry homework
In the preparation of sulfuric acid, sulfur dioxide must be catalytically oxidized to sulfur trioxide. How much oxygen must be available to convert 50.0 L of sulfur dioxide according to this process?
May 15, 2008 by christine

CHEMISTRY
reaction KMnO4+ EDTA(ethylenediaminetetraacetic acid) + MnSO4(s)---> MnCl3 (Violet/Rose solutions) note: Mn is being reduced. a) What is the catalyst in this reaction above? b)What is the role of EDTA in the reaction above
February 14, 2010 by LALA

chemistry
Phosphoric acid and barium hydroxide solutions mix to form water and solid barium phosphate. Write the word equation, skeletal equation, and the balanced equation for this word problem.
March 3, 2010 by Joe

chemistry
Given that ?Hf for OH- ions is -229.6 kJ/mol, calculate the enthalpy of neutralization when 1 mol of a strong monoprotic acid (such as HCl) is titrated by 1 mol of a strong base (such as KOH) at 25 degrees C
November 2, 2012 by antonette

CHEMISTRY
Silver reacts with nitric acid to form nitrogen monoxide, silver nitrate and water. Calculate the volume of nitrogen monoxide gas (@STP) that can be produced from the reaction of 5.00g of silver?
October 7, 2013 by Pip

Pages: <<Prev | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | Next>>

Search
Members