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April 25, 2015

Search: a certain reaction has the following generaln form

Number of results: 58,795

Chemistry
Write a balanced redox reaction between mercury and bromine to form Hg2^2+.
December 6, 2010 by Ari

Chemistry
How to draw the abbreviated structural formula in truncated form of reaction known as esterification of glycerol.
September 23, 2011 by Katarzyna

Chemistry
Calculate the enthalpy change for the reaction: 2S(s) + 3O2(g) --> 2SO3(g) Use the following thermochemical equations: Reaction S(s) + O2(g) --> SO2(g) Delta H(in kJ) -296.8 2SO2(g) + O2(g) --> 2SO3(g) Delta H(in kJ) -197.0
October 13, 2010 by Jordin

Chemistry
Classify each of the following as a redox reaction or a non-redox reaction. Zn+CuCl2 -> ZnCl2+Cu HCl+NaOH -> H2O+NaCl 2CO+O2 -> 2CO2 SO3+H2O -> H2SO4
December 2, 2012 by Anon

chemistry
write a balanced chemical reaction for the reaction of aqueous magnesium chloride with aqueous potassium phosphate to form solid magnesium phosphate (Mg3(PO4)2) and aqueous potassium chloride (KCl). Indicate the physical states of the reactants and products
October 15, 2010 by Jessica

chemistry
The molar volume of a certain form of solid lead is 18cm3/mol. Assuming cubic closest packed structure, determine the number of Pb atoms per unit cell.
November 3, 2012 by Sandy

chemistry
iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3 + 3 CO --> 2 Fe + 3 CO2 If you begin the reaction with 84.34 g of iron(III) oxide and 68.87 g of CO, which reactant will be in excess at the end of the reaction and how ...
July 12, 2011 by dan

Chemistry
Iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3 + 3 CO --> 2 Fe + 3 CO2 If you begin the reaction with 84.34 g of iron(III) oxide and 68.87 g of CO, which reactant will be in excess at the end of the reaction and how ...
November 5, 2012 by Brittany

chemistry
Iron(III) oxide reacts with carbon monoxide gas to form solid iron metal and carbon dioxide gas: Fe2O3 + 3 CO --> 2 Fe + 3 CO2 If you begin the reaction with 84.34 g of iron(III) oxide and 68.87 g of CO, which reactant will be in excess at the end of the reaction and how ...
November 5, 2012 by Sheree'

Chemistry
I am trying to figure out how to calculate the reaction rate. In my question the reaction rate is: 1/2x molarity of sodium thiosulfate/reaction time Then I have to compare the rates of runs 1-3 and determine the orders of the reaction. Do I only find the reaction rate based ...
October 1, 2012 by Zach

Chemistry
Based on the following chemical equation answer the question below show all your calculation The balanced chemical reaction of iodine with hydrogen sulfide h2s(g)+i2(s)-----2HI(g) + S(s) (a) Based on the above chemically balanced equation, how many grams of HI should be ...
October 20, 2012 by Tasha

Chemistry
Consider the reaction below: 4NH3(g) + 3O2(g) -> 2N2 + 6H20, K=10^80 @ certain temp initially, all the reactants and products have concentrations equal to 12M. At equilibrium, what is the approximate concentration of oxygen?
May 23, 2010 by Scott L.

Chemistry
Consider the reaction below: 4NH3(g) + 3O2(g) -> 2N2 + 6H20, K=10^80 @ certain temp initially, all the reactants and products have concentrations equal to 12M. At equilibrium, what is the approximate concentration of oxygen?
May 23, 2010 by Scott L.

AP Chemistry
THe following reaction is carried out in a bomb calorimeter: 4NH3(g )+ 5O2(g) ---> 4NO(g) + 6H20 The calorimeter constant is 45.0kJ/K. WHen 34.0g of NH3 are reacted in the calorimeter, the temperature rises by 10.0C. What is the change in energy, dE (where d is delta), for ...
October 2, 2011 by bluedevil

Chemistry
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide, , can be titrated against a solution of potassium permanganate, . The following equation represents the reaction: 2KMnO4+H202-> ...
September 18, 2010 by Peter

Chemistry
Consider the following unbalanced reaction. P4(s) + F2(g)---> PF3(g) How many grams of F2 are needed to produce 114 g of PF3 if the reaction has a 80.3% yield? I've worked it every way I can think, and the online grader says I am wrong. Someone plz lend me a hand.
September 13, 2011 by Jeff

ap chemistry
some reactions that are considered to be spontaneous at low temperatures will not proceed at a measurable rate or form any measurable quantity of products for several hours, days, or years. a. explain why this is. b. will the addition of a catalyst alter the value of delta "G...
December 5, 2009 by Anonymous

Please Help Me
Use the equation for the synthesis of hydrogen to answer the following. C (s) + H2O (l) -> CO (g) + H2 (g) deltaH = + 31.3 kcal/mol carbon deltaS = +32 cal/(molK) Calculate the energy change (deltaH) when 5.00 g of carbon is consumed. Calculate the energy change (deltaH) ...
February 19, 2013 by John

Chemistry
I did a lab where we had to determine the iron content in ore...i am confused about the reactions that occured during the reaction...i need reactions for the following... 1) The samples were treated with 6M HCl until all the iron ore dissolved.Assuming all of the ore is in the...
December 1, 2009 by Joanna

Chemistry
For the following reaction 2NO2 -> 2NO +O2 is second order reaction. If the initial concentration of NO2 is 0.098M and the initial rate of disappearance is 2.72e-3 M/sec , what is the value of the rate constant?
February 9, 2015 by Cole

chem
A certain first-order reaction has a rate constant of 2.75 10-2 s−1 at 20.C. What is the value of k at 50.C if Ea = 75.5 kJ/mol? i know to use the ln(k1/k2)= (ea/R)((1/T1)-(1/T2)) but how do i know what T2 is when i only have one temp? there is a b part to the question...
February 10, 2013 by Hannah

chemistry please help
The reaction between hydrogen and chlorine gases gives hydrogen chloride gas in the following reaction: H2(g) + Cl2(g) = 2HCl(g) It is found experimentally that 1 mole of H2 gas reacts with 1 mole of Cl2 gas at constant temperature and pressure, to release 184 kJ of heat. What...
January 10, 2013 by john

Chem
Consider the following reaction: 6A + 2B 5C + 4D Determine the following rates at a time when the rate of consumption of B is 2.5E-05 M/s. a) rate of consumption of A M/s b) rate of formation of C M/s c) rate of formation of D M/s d) rate of reaction M/s
November 14, 2011 by Rachel

chemistry
Use the following steps to balance the redox reaction below: Mg + Au+ Mg2+ + Au -Write the oxidation and reduction half-reactions. Make sure each half-reaction is balanced for number of atoms and charge. -Multiply each half-reaction by the correct number, in order to balance ...
February 8, 2012 by Adrian

chemistry
Based on the following chemical equation, answer the questions below. Show all your calculation The balanced chemical reaction of iodine with hydrogen sulfide is as follows: H2S(g)+I2(s)-----2HI(g) + S(s) (a) Based on the above chemically balanced equation, how many grams of ...
October 19, 2012 by Tasha

Chemistry
Use the equation for the synthesis of hydrogen to answer the following. 10 points. C (s) + H2O (l) -> CO (g) + H2 (g) deltaH = + 31.3 kcal/mol carbon deltaS = +32 cal/(molK) Calculate the energy change (deltaH) when 5.00 g of carbon is consumed. Calculate the energy change...
February 19, 2013 by John

Chemistry
Which of the following pairs of atoms would you expect to combine chemically to form an ionic compound? A.Li and S B.O and S C.Al and O d.F and Cl e.I and K F.H and N Which of the following pairs of elements will not form ionic compound. a.sulfur and oxygen b.sodium and ...
November 16, 2006 by Chris

Chemistry
Consider the following chemical reaction: C (s)+ H2O(g) --> CO(g)+ H2(g) How many liters of hydrogen gas are formed from the complete reaction of 1.20 mol of C? Assume that the hydrogen gas is collected at a pressure of 1.0 atm and temperature of 310 K.
April 16, 2010 by Eileen

help help help chemistry
why will no one answer this question? For a one step reaction, the activation energy for the forward reaction is 40.0 kJ/mol and the enthalpy of reaction is -20.0 kJ /mol. Which statement below is true? a. The activation energy of the forward reaction would be affected to a ...
February 27, 2012 by john117

chemistry
A reaction mixture is in a 5.4 L flask at 25 oC initially contains only 7.64 grams of acetic acid. (CH3COOH). Set up your I.C.E. table and use it to answer the following questions. HINT: You will need to look up the Ka for this equilibrium reaction. CH3COOH(aq) CH3COO-(aq...
March 1, 2011 by juan

AP Chemistry
I need alot of help on this problem, it is due WEDNESDAY and I have no clue how to do it Use the following information to identify element A and come pound B, then answer questions a and b. An empty glass container has a mass of 658.572 g. It has a mass of 659.452 g after it ...
January 21, 2008 by Eric

Chemistry
(a) Which of the following are requirements for anionic polymerization? 1-A double bond 2- End groups which can react by releasing a small molecule 3- A strong base to initiate the reaction 4- A strong acid to initiate the reaction 5- An electron-withdrawing group near the ...
November 26, 2013 by Saraa

AP Chemistry (repost)
some reactions that are considered to be spontaneous at low temperatures will not proceed at a measurable rate or form any measurable quantity of products for several hours, days, or years. a. explain why this is. b. will the addition of a catalyst alter the value of delta "G...
December 5, 2009 by anonymous

CHemistry
The first step of the synthesis is described by the reaction below. When 1.200 g of Fe(NH4)2(SO4)2 6H2O is mixed with 13 mL of 1.0 M H2C2O4, the theoretical yield of FeC2O42H2O is ? grams im not sure what to do. do u convert 1.0M to grams first? by multiplying .013 L thx First...
April 22, 2007 by Jason

Chemistry
If Cobalt(II)Sulfate is heated too strongly, the following reaction will occur CoSO4 produces CoO(s)+ SO3(g) If you are heating a sample of CoSO4.6H20 and this reaction occurs along with dehydration, what will happen to the experimental percent water? Explain your answer.
October 2, 2010 by Sarah

Chemistry
What would be the product of the reaction of 4-methyl pyridine with Ac2O/AcOH and PhCHO? I'm really stuck on this. I'm guessing the pyridine will attack the anhydride and form an acyl pyridinium ion but I'm not sure where to go from there. If that reacts with AcOH I'll end up ...
April 21, 2010 by Alice

chemistry
If you add hydrochloric acid (HCl) to magnesium (Mg) metal, what will you observe? What products form in this reaction?
December 1, 2008 by Bubba

chemistry
Will sodium sulfide and iron II sulfate form a precipitate? if so what would the reaction look like?
December 12, 2010 by kelly

Chemistry
What mass of calcium phosphate form by the reaction of 50 mL of 0.2 M H3PO4 with 80 mL of 0.1 M Ca(OH)2? 2 H2PO4 + 3 Ca(OH)2 --> Ca3(PO4)2 + 6 H20
July 20, 2012 by S.P

science
Is this hypothesis in the right format?. When yeast and vinegar are put together, they will form an endothermic reaction.
March 13, 2014 by Anonymous

chemistry
The ?H of the reaction below is -575.13 kJ. Is this reaction spontaneous? 2ZnS + 3O2 + C ? 2SO2 + 2Zn + CO2 A. It is not because the ?H of the reaction is negative. C. It depends on the temperature because the ?H of the reaction is negative and the ?S is negative. D. It ...
December 11, 2014 by Morgan

Organic Chem Help
You react hydrogen iodine with 3-methylhex-3-ol. a) write the overall equation for the reaction. b) do you expect this reaction to go by an SN1 or an SN2 mechanism? Explain your answer. c) give a detailed reaction mechanism for the reaction showing all steps and intermediates.
October 3, 2014 by JuYoung

chemistry
A voltaic cell is constructed based on the following reaction and initial concentrations: Fe^2+,( 0.0055 M ) + Ag+,( 2.5 M ) ----> Fe^3+,( 0.0055 M ) + Ag(s) <---- its a forward and reverse arrow Calculate [Fe^2]+ when the cell reaction reaches equilibrium can someone ...
March 28, 2009 by lynn

Chemistry
Suppose NaOH is added to the following system when it is at equilibrium. NH3 (aq) + H2O (l) = NH4 (aq) + OH (aq) a) in which direction will the reaction shift after the NaOH is added? b) will this stress increase or decrease the value of the reaction quotient, Q?
January 27, 2015 by Anonymous

Chemistry
8. For the reaction H2(g)+I2(g)\2HI(g); [H2] = 0.95 M; [I2] = 0.78 M; [HI] = 0.27 M. Calculate the equilibrium constant K and describe the direction (forward or reverse) of the reaction. Will adding a catalyst to the reaction alter the direction of the reaction? Why? Describe...
March 29, 2010 by Kathleen

Chemistry
Redox titrations are used to determine the amounts of oxidizing and reducing agents in solution. For example, a solution of hydrogen peroxide,H2O2, can be titrated against a solution of potassium permanganate, KMnO4. The following equation represents the reaction: 2KMnO4(aq)+...
October 3, 2010 by Ellen

chemistry
Dinitrogen tetroxide decomposes to form nitrogen dioxide in a second order reaction: N2O4(g)-> 2NO2(g) At 400K, the rate constant for this reaction has been measured to be 2.9x10^8 L/mol*s.suppose 0.222 mol of N2O4(g) is placed in a sealed 41.7L container at 400K and ...
April 22, 2014 by Anonymous

chemistry
I have two questions that I really don't understand. The first one is: A reaction proceeds with delta H=-10kJ/mol. The energy of activation of the uncatalyzed reaction is 150kJ/mol, whereas it is 100kJ/mol for the uncatalyzed reaction. How many times faster is the catalyzed ...
March 5, 2012 by kathryn

Chemistry(Please check)
1) A catalyst alters the rate of a reaction by a. changing the products in the reaction. b. increasing the activation for the reaction. c. always providing a surface on which the molecules react. d. providing an alternate pathway for the reaction. e. increasing the ...
February 24, 2012 by Hannah

SI Chemistry
hydrogen chloride gas reacts with oxygen gas to yield chlorine gas and water vapor in an equilibrium reaction. an experiment was performed in a closed vessel starting with a mixture of 0.50 M HCl and 0.050 M O2. the amount of chlorine was monitored until no change was observed...
November 30, 2011 by Cody

Chem
Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate constant of 5.87*10^-4 at 485degreesC. If a 2.5L reaction vessel initially contains 724 torr of cyclopropane at 485degreesC, how long will it take ...
February 24, 2011 by Bryan

Urgent Chem help plz
is answer +103 KJ.. plz chk Plz explain in detail.... i tried to search on internet but i am confused with co-efficents.. how to set up the equaiton .. plz help me ??? Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj...
November 12, 2008 by Sarah

chem class
The value of Keq for the following reaction is 0.25: SO2 (g) + NO2 (g)<~> SO3 (g) + NO (g) The value of Keq at the same temperature for the reaction below is __________. 2SO2 (g) + 2NO2 (g)<~> 2SO3 (g) + 2NO (g) answer is 0.25 how do i figure this out?
November 18, 2010 by richy

College Chemistry
Animals break down glucose (C6H12O6) as a source of energy according to the following overall reaction. C6H12O6(aq) + 6O2(g) 6CO2(g) + 6H2O(l) What mass in grams of CO2(g) is produced from the reaction of 15.0 g of glucose?
March 26, 2012 by Lisa

chemistry
having trouble posting but will try again. translate the following verbal description into scientific notation. magnesium ribbon is burned in pure oxygen gas. thanks The reaction forms magnesium oxide (MgO). Se if you can write the balanced reaction.
January 19, 2007 by key

chemistry
In the commercial production of the element arsenic, arsenic (II) oxide is heated with carbon which reduces the oxide to the metal according to the following equation: 2As2O3 + 3C ---- 3CO2 +4As A>if 8.87 g of As2O3 is used in the reaction and 5.33 g of As is produced ...
April 17, 2008 by john

chemistry / help please
For each reaction,which ion in the precipitate was responsible for the color 1-reaction of Sodium Hydroxide and Copper(II)Sulfate 2-reaction of Sodium Sulfate and Barium Chloride. 3-reaction of Sodium Hydroxide and Iron(III)Sulfate. 4-reaction of Sodium Hydroxide and Nickel(II...
May 10, 2012 by Marie

chemistry(check my answer)
The overall rate of a chemical reaction is determined by a)the slowest step in the reaction mechanism. b)the fastest step in the reaction mechanism. c)ΔG for the overall reaction. d)the last step in the reaction mechanism. e)the first step in the reaction mechanism. is it...
May 16, 2010 by bme1

Chemistry
(a) Which of the following are requirements for anionic polymerization? --A double bond --End groups which can react by releasing a small molecule --A strong base to initiate the reaction --A strong acid to initiate the reaction --An electron-withdrawing group near the double ...
November 19, 2013 by Anon

chemistry
In a reaction involving the bromination of acetone, the following initial concentraions were present in the reaction mixture. acetone (0.8mol/L), H+ (0.2 mol/L), Br2 (0.004 mol/L) At 25 degrees C, it took 240s before the colour of Br2 disappeared. If the reaction is zero order...
February 27, 2011 by Mal

Chemistry
A reaction proceeds with ∆ H = 40 kJ/mol. The energy of activation of the uncatalyzed reaction is 120 kJ/mol, whereas i t is 55 kJ/mol for the catalyzed reaction. How many times faster is the catalyzed reaction than the uncatalyzed reaction at 25C?
February 27, 2015 by Jessica

chemistry
Sulfur dioxide and oxygen gases react at high temperature (400 o C) in the presence of a catalyst(like Pt) to form sulfur trioxide gas. The reaction is started from a gas mixture at 400oC with the partial pressures PSO2 = 15 atm and PO2= 10. atm. What will be the final partial...
April 17, 2015 by David

Chemistry 130
Will someone help me by letting me know if I did these correct, or if there the correct answers? Thanks! 2 (10). If two moles of hydrogen gas (H2) react in the following equation, how many moles of H2O will be formed? 2H2 + O2 2H2O a. 2 moles b. 4 moles c. 1 mole d. 8 moles...
September 8, 2009 by Jessie

chemistry
1.The equilibrium constant for the oxidation of elemental iron metal, Fe, by oxygen, O2 to form hematite, according to the reaction 2Fe + (3/2)O2 = Fe2O3 is known to have the value K=exp(+68.8) at 1000C. The equilibrium constant for the formation of CO2 from carbon and O2, C...
July 5, 2010 by GM

AP Chemistry
Consider the following reaction: CH3X + Y --> CH3Y + X At 25 degrees Celcius the following two experiments were run, yielding the following data: Experiment 1: [Y]0 = 3.0 M [CH3X] (mol/L) Time (hours) 7.08*10^-3 1.0 4.52*10^-3 1.5 2.23*10^-3 2.3 4.76*10^-4 4.0 8.44*10^-5 5....
January 1, 2015 by Kyle

chem
How does a gas differ from a liquid with respect to the following property: Ability to mix with other substances of the same phase to form homogeneous mixtures Gases form homogeneous mixtures with each other regardless of the identities or relative proportions of the component...
December 9, 2009 by asdf

CHEMISTRY HELP ASAP PLEASE!!!!!!!!!!!!!!!
In the commercial production of the element arsenic, arsenic (II) oxide is heated with carbon which reduces the oxide to the metal according to the following equation: 2As2O3 + 3C ---- 3CO2 +4As A>if 8.87 g of As2O3 is used in the reaction and 5.33 g of As is produced ...
April 17, 2008 by john

Physical Science
Predict the shift of equilibrium for each of the following conditions in the following reaction involving gaseous reactants and products: N2 + 3H2 = 2NH3 + heat
February 8, 2013 by Ed

chemistry
Given the following data: 4PCl5(s) P4(s) + 10Cl2(g) H = +1774 kJ P4(s) + 6Cl2(g) 4PCl3(l) H = -1278.8 kJ Find the H of the following reaction: PCl5(s) PCl3(l) + Cl2(g)
March 3, 2015 by Hi

Chemistry
Sulfur Trioxide can be dissolved to form sulphuric acid. But it is avoided since the reaction is violent. Explain why?
January 30, 2010 by Amir

science
In the equation: Fe(NO) (aq) + 3KSCN (aq) FeSCN (aq) + 3KNO (aq) Why do two aqueous solutions form? What is this calle? Is there a seconday reaction?
January 4, 2011 by ashley

Chemistry
A(n) ____ reaction is one in which oxygen reacts with another compound to form carbon dioxide, water, and heat.
January 4, 2012 by Zach

Chemistry
when 0.20 mole HF is dissolved in water to a volume of 1.00 L, 5.8% of the HF dissociates to form F- (aq). What is the equilibrium constant for the reaction ? HF(aq) + H2O (I) ----- F- (aq)+H3O+(aq)
April 4, 2012 by Elmali

Chemistry
when 0.20 mole HF is dissolved in water to a volume of 1.00 L, 5.8% of the HF dissociates to form F- (aq). What is the equilibrium constant for the reaction ? HF(aq) +H2O(l) ------ F- (aq) +H3O+ (aq)
April 5, 2012 by emily

chemistry
What mass of bromine gas will form from the complete reaction of 150 g potassium bromide and 120 g of chlorine
March 8, 2014 by heather

chemistry
Urea (CO(NH2)2) can react with water to form CONH2NH+ 3 and a hydroxide ion. Which statement is true for this reaction?
June 8, 2014 by susan

Chemistry
Write the ionic equation for the reaction of lead 2 nitrate reacting with the acidic solution to form a precipitate
August 29, 2014 by Caro

chem
Calculate the standard enthalpy change for the reaction 2A+B->2C+D Use the following data: Substance A=-257kj/mol B=-413kj/mol C=189kj/mol D=-475kj/mol For the reaction given , how much heat is absorbed when 3.00mol of A react?
October 8, 2008 by tomi

Chemistry
A student ran the following reaction in the laboratory at 651 K: 2 NH3(g) N2(g) + 3 H2(g) When she introduced 8.75E-2 moles of NH3(g) into a 1.00 Liter container, she found the equilibrium concentration of H2(g) to be 0.119 M. Calculate the equilibrium constant, Kc, she ...
November 19, 2013 by Jessica

Chemistry
A student ran the following reaction in the laboratory at 650 K: H2(g) + I2(g) 2 HI(g) When she introduced 0.204 moles of H2(g) and 0.229 moles of I2(g) into a 1.00 Liter container, she found the equilibrium concentration of I2(g) to be 5.77E-2 M. Calculate the equilibrium ...
November 19, 2013 by Jessica

chemistry
The following molecular equation represents the reaction that occurs when aqueous solutions of lead(II) nitrate and magnesium chloride are combined. Pb(NO3)2 (aq) + MgCl2 (aq) PbCl2 (s) + Mg(NO3)2 (aq) Write the balanced net ionic equation for the reaction.
March 3, 2014 by kammy

Chem I
Ok one more! Write the balanced equations and assign oxidation numbers to all atoms in these two reactions involving iron. If the effective oxidation number of any particular atom changes during the reaction then a redox reaction has occurred. If a redox reaction takes place ...
November 15, 2010 by Natalea

Chemistry
You read a reversible reaction from left to right in the forward direction. This direction shows which of these occurring? a) the reactants forming a product b) the product decomposing to form reactants c) both a and b occurring d) b occurring, followed by a e) none of the ...
December 8, 2014 by Jennifer

chemistry
Oxygen reacts with the dipeptide glycylglycine [C4H8N2O3(s)] to form urea [CH4N2O], carbon dioxide and water: 3O2(g) + C4H8N2O3 (s)  CH4N2O (s) + 3CO2(g) + 2H2O(l) At STP, solid glycylglycine has the following thermodynamic properties: = -491.5 kJ/mol = -746.0 kJ/mol...
February 11, 2009 by Tillie

AP Chem
Use the following information to identify element A and compound B, then answer questions a and b. I'm so stuck on this problem and don't know where to begin. I need to have this problem done by Wednesday. PLEASE HELP!!! An empty glass container has a mass of 658.572 g. It has...
January 21, 2008 by John

art/101
Write a 200- to 300-word summary that answers the following: o Summarize the reaction of the public to Michelangelos David and Marcel Duchamps Nude Descending a Staircase. o What did contemporary viewers find objectionable about each work? o What are the reasons behind ...
September 14, 2010 by stephaine

Chemistry
The overall rate of any chemical reaction is most closely related to a) the number of steps in the reaction mechanism b)the overall reaction c) the fastest step in the reaction mechanism d)the slowest step in the reaction mechanism e) the average rate of all the steps in the ...
July 21, 2010 by Bobby

chemistry
For the reaction A to products}, the following data were obtained: t=0 s, A}]=0.715 M; 22 s, 0.605 M; 74 s, 0.345 M; 132 s, 0.055 M. What is the half-life of the reaction? ive been posting this for awhile now...can someone just show me how to go about doing this problem? i ...
February 28, 2010 by joe

chemistry
5. Meals-ready-to-eat (MREs) are military meals that can be heated on a flameless heater. The heat is produced by the following reaction: Mg(s) + 2H2O(l) --> Mg(OH)2(s) + H2(g) Calculate the number of grams of Mg needed for this reaction to release enough energy to increase...
May 14, 2013 by tra

chemistry
1)The reaction of methane and oxygen yields carbon dioxide gas and water. The unbalanced reaction is as follows: CH4(g) + O2(g)CO2(g) + H2O(g) A. If 0.718 grams of methane are reacted, how many grams of water vapor are produced? B. If 1.621 grams CO2 are released, how many ...
January 7, 2010 by eng

science
Hydrogen Cyanide (boiling temperature 26 degrees Celsius) is an important chemical for the production of nylon and various transparent plastics. It is produced on an industrial scale by the oxidation of methane in the presence of ammonia. The equation below is an unbalanced ...
April 21, 2007 by katie

chemistry
Sodium metal and water reacts to form hydrogen and sodium hydroxide. If 5.98g of sodium react with water to form .26g of hydrogen and 10.40g of sodium hydroxide, what mass of water was consumed in the reaction?
July 7, 2010 by Amanda

basic math
An education fund allocates RM10,000 to help 100 students from form three, form five and form six in a school. Each form three student receives RM80, each form five student receives RM120 and each form six student receives RM160. The number of form three students that receive ...
November 29, 2012 by kchik

Chemistry
The reaction between 0.045 g of calcium with an excess of water was carried out in an ice calorimeter as used in this lab. The volume of water in the calorimeter decreased by 0.18 mL during the reaction a) Write the equation for the reaction which occurs. Is it a redox ...
June 3, 2009 by Sean

chem
1) When a mixture of potassium chlorate and an appropriate catalyst is heated in an open test tube, potassium chloride and oxygen gas are produced. This reaction is not reversible, because a. the system reaches equilibrium b. the reaction does not go to completion c. the ...
February 1, 2012 by HEATHER

Chemistry
How do I solve this problem? According to the following reaction, how many grams of mercury(II) oxide are needed to form 22.4 grams of oxygen gas? mercury(II) oxide (s) mercury (l) + oxygen (g)grams mercury(II) oxide
September 21, 2007 by Jamal

chemistry
According to the following reaction, how many grams of copper(II) chloride are necessary to form 0.984 moles silver chloride? silver nitrate (aq) + copper(II) chloride (s) silver chloride (s) + copper(II) nitrate (aq)
October 22, 2010 by Gina

complete and balnces theses reactions
how do i complete and balnces theses reactions???? CH3-CH2-CH3 (g) + Br2 (l) --> like how in the world????? do i do this? lol aint got a clue wish i would have listened at school now. Alkanes usually react with a halogen to form one of several halides. The simplest reaction...
June 13, 2006 by bobby

Chemistry
(1)Aluminum reacts with oxygen to produce aluminum oxide according to the following reaction: 4Al(s) + 3O2(g) → 2Al2O3(s) Calculate the moles of Al2O3 produced when the reaction is performed with 31.06 g of each reactant. (2)Nitrogen dioxide reacts with water to produce ...
March 6, 2013 by WCU cats

CHEMISTRY
the equilibrium composition of a reaction is 1.522mol CO, 1.566mol H2, 0.478mol CH4 and 0.478mol H2O and the volume of the reaction vessel is 10Litres. -What is the equation for the reaction? -Calculate the equilibrium constant for both the forward and reverse reaction?
April 5, 2011 by Taynell

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