What is the empirical of compound (X) going through the following decomposition reaction?

79,073 results, page 88

  1. Chemistry

    In the reaction: Protection of 1-Phenylethanol by 3,4-Dihydro-2H-pyran, 1-phenylethanol, 3,4-Dihydro-2H-pyran and anhydrous ether were added first and stirred in ice-water bath before acid catalyst p-toluenesulfonic acid monohydrate was added. The reaction was kept at 0 deg ...
  2. Language Arts

    "Full Fathom Five" by - William Shakespeare Full fathom five thy father lies; Of his bones are coral made; Those are pearls that were his eyes; Nothing of him that doth fade But doth suffer a sea change Into something rich and strange. Sea nymphs hourly ring his knell; Ding-...
  3. Social Studies - Please Check my Answer

    Please check my answer, I am not sure for this one. In 1784 the British forced American merchants to pay duties on a. trade goods imported from the British West Indies. - (This is my answer.) b. trade goods imported through Canadian ports. c. British goods sold in America. d. ...
  4. communication

    Which of the following is NOT a question you need to answer to choose a persuasive strategy? A What do you want readers to do? B What points will the audience agree with? C How strong a case can you make? D What kind of persuasion does your organization value? I am completely ...
  5. Chemistry: Organic Chemistry

    Optically pure 2-octyl sulfonate, a compound with a leaving group comparable to the tosylate and mesylate groups discussed in this chapter, was treated with varying mixtures of dioxane and water as solvent. The optical purity of the resulting 2-octyl alcohol, a solvolysis ...
  6. Chemistry

    A second order reaction has a rate constant of 8.7x10^-4/(M*s) at 30 degrees C. At 40 degrees C the rate constant is 1.8x10^-3/(M*s). What are the activation energy and frequency factor for this reaction? Predict the value of the rate constant at 4 degrees C
  7. American Government

    All of the following statements correctly describe the typical independent agency except: A. it has a narrower area of responsibility than cabinet departments. B. it is divided into a number of smaller operating units. c. its employees are mostly hired through the civil ...
  8. Math

    By what percentage does the average price increase from 1994 to 1995? Obtain a truncated version of the graph by sliding a piece of paper over the bottom of the graph so that the bars start In the truncated graph, by what percentage does the price appear to increase from 1994 ...
  9. Algebra

    1. Is it more difficult to run up a ramp with a slope of 1/5 or a slope of 5? 2. What is the slope of a line that passes through the points (2,0) and (5,0)? 3. A line has a slope of 2. It passes through the points (1,2) and (3,y). What is he value of y? 4. What is the slope of...
  10. Science Ms. Sue Please

    1. The human endocrine system is made up of which of the following structures? (1 point) vessels receptors glands * chambers 2. Which of the following best describes the function of the endocrine system? (1 point) It secretes chemical messengers that travel through the blood ...
  11. Columbus State

    CO(g) + 2H2(g) ↔ CH3OH(g) Kc=14.5 (500K) a. In which direction will the reaction proceed if the reaction vessel contains 0.500 atm CO, 0.500 atm H2, and 0.500 atm CH3OH? Show your calculations for full credit. Remember that Q and K both have to be calculated with either ...
  12. Science

    Water also travels through living reservoirs. Which of the following organisms does not function as a living reservoir for water? - Squirrels - Wolves - Plums - All of above are living reservoirs for water
  13. CHEMISTRY HELP!!!!!!!!

    How many grams of KCl are produced by the thermal decomposition of KClO3 that produces 25mL of O2 at 25 degrees and at 1 atm? A)0.0508 B)0.0762 C)0.0835 D)0.125 what is the anwser and what equation would i use to get the anwser? Write the balanced equation for the ...
  14. Chemistry

    An unknown compound X is one of the four compounds listed in the table below. A mixture of X with o-toluic acid melts at 100 degrees Celsius, a mixture of X with benzoic acid melts at 112 degrees Celsius, a mixture of X with phenyl succinate melts at 110 degrees Celsius, and a...
  15. Chemistry

    Determine the volume of 0.240 M KOH solution required to neutralize each of the following samples of sulfuric acid. The neutralization reaction is shown below. H2SO4(aq) + 2 KOH(aq)---> K2SO4(aq) + 2 H2O(l) a) 26 mL of 0.240 M H2SO4 b) 143 mL of 0.14 M H2SO4 for a I got ....
  16. Chemistry

    The following three step mechanism has been proposed for the oxidation of iodide ion by peroxide: H2o2 + I^- ----> HOI + OH^- Slow OH^- + H^+ ----> H2O Fast HOI + H^+ + I^+ ---> I2 + H2O Fast A. What is the overall reaction described by this mechanism? B. What is the ...
  17. physics

    a bullet traveling horzontally at a speed of 350m/s hits board perpendicular to its surface passes through n emerges on the other side at a speed fo 210m/s. if the board is 4.00cm thick, how long does the bullet take to pass through it.
  18. chemistry

    A large cylinder of helium had a small hole through which the helium escaped ata rate of 0.0064 mol/hr. How long would it take for 0.010 mol of CO to leak through a similar hole if it were at the same pressure?
  19. Physic

    A bullet traveling horizontally at a speed of 350m/s hits a board perpendicular to its surface, passes through and emerges on the other side at a speed of 190m/s . If the board is 3.80cm thick, how long does the bullet take to pass through it?
  20. Biology!!!!!

    7)State whether the following sentences are true or false. Rewrite them if they are false. a) Every chemical reaction taking place in cells is regulated by a specific enzyme. b) Enzymes work inside cells only. c) Enzymes are carbohydates d) An active site is the part of the ...
  21. Chem

    I have 4 questions, I got the answer for three of them and just want you to check and see if they are right and i do not know the answer to the fourth one. 1)4HCl(g)+O2(g)<=>2H2O(g)+2Cl2(g)+114.4 kJ Which side of the reaction will be favoured by an decrease in pressure...
  22. Chemistry

    you add 0.05ml of 0.10M agno3 to 4ml of 2.0 nacl it forms saturated solution of agcl<---> ag+ + cl- using a saturated solution you set up ag | ag+( test solution after reaction) || ag+(1.0ml) | ag how do we calc the equilibrium of ag+ of the test solution after reaction ?
  23. Chem please help

    What is the purpose of a calorimeter? A. To determine the temperature of a chemical reaction B. To determine the energy changes of a chemical reaction C. To identify the specific temperature of an unknown substance D. To measure the average kinetic energy of a substance I ...
  24. English

    I’m having problems in paraphrasing the song “Never Ever” by All Saints. Can you check it, please? I included a sentence on the use of “propose” and one concerning the use of reflexive pronouns. 1) Storm is a bit ashamed of herself. She feels sorry for Jason. Ed ...
  25. ap chem

    Hydrogen cyanide is produced industrially from the reaction of gaseous ammonia, oxygen and methane: 2NH3(g) + 3O2(g) + 2CH4 -->2HCN + 6H2O(g) a)If 5.00 x 10^3 kg each of NH3 , O2, and CH4 are reacted what mass of HCN will be produced, assuming 100% yield? b)At the end of ...
  26. chemistry

    Elemental zinc will react with acid to evolve hydrogen gas. This is a redox reaction. Write a balanced molecular equation for the reaction of zinc and hydrochloric acid, showing the coefficents and the phases of all reactants and products. Below is an example of the form of ...
  27. Chemistry

    What mass of copper(II) nitrate would be produced from the complete reaction of 65.3 g of copper, according to the chemical reaction shown below? Cu + 2 AgNO3 ----> Cu(NO3)2 + 2 Ag Use the masses to two decimal places using the periodic chart in the front of your text. ...
  28. math

    donna took 3hours to row 18 km upstream. her return trip took 1 hour less. find the rate of rowing in still water and the rate of the current. let the speed of her rowing in still water be x km/h, let the speed of the current be y km/h going with the current: speed is (x+y), ...
  29. Chem

    I don't understand the effect of temperature on a reaction. For exmaple: CO + 3H2 <-> CH4 + H2O deltaH= -230 KJ If there were an increase in temperature then the CH4 and H2O would have a harding time becoming the CO and H2 so therefore the reaction would move to the ...
  30. Chemistry

    Given the reaction shown below, calculate: (a) The amount of NO2, in grams, generated from reactants if 300.23 kJ of heat energy is released during the course of the reacton. (b) The heat energy released if 33.23 grams of O2 is consumed in the reaction. 2 NO(g) + O2(g) „_ 2 ...
  31. chemistry

    When enough NaCl(s) is added to the compartment containing gold to make the [Cl -] , the cell potential is observed to be 0.31 V. Assume that Au3+ is reduced and assume that the reaction in the compartment containing gold is Au3+(aq) + 4Cl- (aq) ↔ AuCl4- . Calculate the ...
  32. Chemistry

    2NaOH+2Al+2H2O --> 2NaAlO2+3H2 here is the reaction. If i am trying to find the mass of hydrogen produced and i am trying to convert .95 moles Al to moles H, which number from the reaction do I use for H when converting from moles to moles? Do I 6 because that's the number ...
  33. physics

    a bottle is given a push along a tabletop and slides off the edge of a table. neglect air resistance. a) what force are exerted on the bottle while it is falling from the table to the floor? b) what is the reaction to each force ,that is, on what body and by what body is the ...
  34. Chemistry

    Identification of an unknown powdered metal by reaction with HCl: Why does the pH of the HCl solution initially increase very slowly when an unknown metal is first added to the acid solution, but gradually increase at a faster rate as the reaction proceeds to completion?
  35. Chemistry

    Using the concentration of CH3COOH (0.8326M) and the equilibrium concentration of H3O+ (3.2x10-3), complete the reaction table for vinegar. Then calculate the acidity constant. Reaction table is given Ch3COOH + H2O --CH3COO- + H3O+ Initial. Change equilibrium
  36. Chemistry stoichionetry

    the average human requires 120.0 grams of glucose (C6H12O6) per day. How many grams of CO2 (in the cellular reapiration reaction) are produced from this amount of glucose? the balanced cellular respiration reaction is: C6H12O6 + 6 O2 = 6 CO2 + 6 H2O
  37. chemistry

    carboxylic acid plus alcohol yields ester plus water. It is an organic substitution reaction wot type of reaction is this CH3CO2H + C6H5CH2OH---------------> CH3COOCH2C6H5 + water is it like a substitution or like an addition or wot?
  38. Chem II

    PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?
  39. chemistry kinetics

    Statement-I : For an endothermic reaction, the activation energy is less than the change in enthalpy. Statement-II: Activation energy of a reaction, at a given temperature can never be greater than its change in enthalpy are these statements true? give reason
  40. chemistry

    A 1.009g mixture of Na2SO4 (molar mass=142.04 g/mol) and Pb(NO3)2 (molar mass= 331.20 g/mol)? A)write th3 molecular form of the equation for the reaction. b)write the net ionic equation for the reaction.
  41. chemistry

    if I have the reaction Magnesium + Hydrochloric Acid -> Magnesium Chloride + Hydrogen Gas And I have to 'investigate the effect of the concentration of the acid on the volume of hydrogen gas produced in the above reaction', what would be expected to happen?
  42. chemistry

    Can someone help me finish this equation, please? We're adding Magnesium to Copper sulfate and getting Copper. This is what I have as of now: CuSO4+Mg===>Cu I'm guessing it is a single replacement, so should I add MgSO4 to the right? But then my lab procedure says that we ...
  43. science

    A uniform disk with radius 0.320m and mass 28.0kg rotates in a horizontal plane on a frictionless vertical axle that passes through the center of the disk. The angle through which the disk has turned varies with time according to è(t)= (1.20rad/s)t + (8.70rad/s^2)t^2 my ...
  44. Chemistry

    Complete combustion of a sample of propane produced 2.641g of carbon dioxide and 1.442g of water as the only products. Find the empirical formula of propane. I have already calculated the number of moles for both water and carbon dioxide. I also know that propane is only ...
  45. chemistry

    consider the reaction 2HgCl2 + C2O4-2 ---> 2Cl2-1 + 2CO2 + Hg2Cl2 The initial rate of this reaction was determined for several concentrations of HgCl2 and C2O4-2 and the following rate data was obtained. TRIAL (1) [HgCl2](M)= .105 [C2O4-2](M)= .15 RATE= 1.8 x 10^-5 TRIAL (2...
  46. chemistry

    2. Methanol, CH3OH, is used as fuel in race cars. This liquid fuel can be synthesized using the following process C(s)+ ½ O2(g) + 2H2(g)  CH3OH(l) Calculate delta G using the deta Gf of the reaction. Calculate Kp. What is the relation between the magnitude of delta G ...
  47. Grammar (Ms. Sue)

    Copy the items below, adding exclamation marks as needed. Then, label each item an exclamatory sentence, an imperative sentence, or an interjection. 1. I hate being lost in a desert 2. I want water 3. Yippee It's going to rain. 4. Oh, no It's a flash flood 5. Get to high ...
  48. Grammar (Writeacher)

    Copy the items below, adding exclamation marks as needed. Then, label each item an exclamatory sentence, an imperative sentence, or an interjection. 1. I hate being lost in a desert 2. I want water 3. Yippee It's going to rain. 4. Oh, no It's a flash flood 5. Get to high ...
  49. biology

    __Glycolysis is used to gain energy from glucose. How efficient is it (give an actual number) in its ability to get the energy from glucose into ATP? (assume the organism is undergoing anerobic fermentation). __You are studying a particular reaction in cells and determine that...
  50. Chemistry

    When 0.702 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 114C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...
  51. Chemistry

    When 0.655 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 107C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...
  52. Chemistry Lab

    When 0.671 g of Ca metal is added to 200.0 mL of 0.500 M HCl(aq), a temperature increase of 109C is observed. Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. (Note: Pay attention to significant figures. Do not ...
  53. Chemistry

    Cyclopropane reacts to form propene in the gas phase. The reaction is first order in cylclopropane and has a rate constant of at 485 . If a 2.5 reaction vessel initially contains 724 of cyclopropane at 485 , how long will it take for the partial pressure of cylclopropane to ...
  54. chemistry

    If I use 0.524g of Mg to react with 60.0mL of 1.0M H+. The density of H+ is 1.00 g/mL, and the specific heat capacity equals what water's is. The Final and Initial temp. are 65.8 and 22. Mg(s) + 2H+(aq) ----> Mg2+(aq) + H2(g) so to find the deltaH of this reaction .. i ...
  55. chemistry

    Aluminum granules are a component of some drain cleaners because they react with sodium hydroxide to release both energy and gas bubbles to help clear the drain clog. The reaction is: 2NaOH + Al + 6H2O  2NaAl(OH)4 + 3H2 (note: balance the reaction first) What mass of ...
  56. English

    What does pestilence mean as it is used in the following lines from Act V,Scene 2 of Romeo and Juliet? Friar John:Going to find a barefoot brother out,One of our order,to associate me, Here in this city visiting the sick, and finding him,the searches of the town, Suspecting ...
  57. physics

    (a) A vertically polarized photon goes through two polarizing filters, the first of which is vertically aligned and the second at degrees. What is the probability that the photon is transmitted through both filters? (b) Now, you are allowed to place a polarizing filter between...
  58. Chemistry

    In the reaction 2H20(aq) --> O2(g) + 2H20(l) why doesn't increasing the pressure of oxygen have any effect on the reaction rate? Balance the equation first. What you have isn't balanced. Frankly, it doesn't look possible. You have two mols H2O on each side. Take them out ...
  59. Physics

    To stop a car, first you require a certain reaction time to begin braking. Then the car slows down at a constant rate. Suppose that the total distance moved by your car during these two phases is 56.7 m when its initial speed is 85.0 km/h, and 24.4 m when the initial speed is ...
  60. chemistry

    Our bodies bring in carbohydrates, proteins, and fats as fuel and then we exhale carbon dioxide and water. what type of reaction allowed out bodies to turn fuel into energy to support life? What ,if any is the problem with this classification? It is a combustion reaction right...
  61. Calculus

    Sketch a graph of the parabola y=x^2+3. On the same graph, plot the point (0,−6). Note there are two tangent lines of y=x2+3 that pass through the point (0,−6). The tangent line of the parabola y=x^2+3 at the point (a,a^2+3) passes through the point (0,−6) ...
  62. Chemistry

    Please rank the following compounds in DECREASING order of their reactivity toward the SN2 reaction with sodium ethoxide in ethanol. a. methyl chloride (CH3Cl) b. isopropylbromide ((CH3)2CHBr) c. t-butyliodide (CH3)3Cl) d. methyl iodide (CH3I) e. ethyl chloride (CH3CH2Cl) I ...
  63. chemistry

    Calculate the delta H for the reaction N2H4(l)+ O2(g) --> N2(g) + 2H20(l) Given the following data: 2NH3(g) + 3N20(g) --> 4N2(g) + 3H20(l) N20(g) + 3H2(g) --> N2H4(l) + H20(l) 2NH3(g) + 1/2O2(g) --> N2H4(l) + H20(l) H2(g) + 1/2O2(g) --> H20(l)

    Consider the following reaction that has reached equilibrium: NH3 (aq) + C2H4O2 (aq) ! NH4+ (aq) + C2H3O2- (aq) ∆H = -102.1 kJ a. What will happen to the concentration of NH4+ (aq) if the temperature is raised? b. What will happen to the concentration of NH4+ (aq) if the...
  65. Chemistry

    From the following data at 25°C, H2(g) + Cl2(g) → 2HCl(g) ΔH0 = −185 kJ 2H2(g) + O2(g) → 2H2O(g) ΔH0 = −483.7 kJ Calculate ΔH0 at 25°C for the reaction below. 4HCl(g) + O2(g) → 2Cl2(g) + 2H2O(g)
  66. chemistry

    you add 0.05ml of 0.10M agno3 to 4ml of 2.0 nacl it forms saturated solution of agcl<---> ag+ + cl- using a saturated solution you set up ag | ag+( test solution after reaction) || ag+(1.0ml) | ag how do we calc the equilibrium of ag+ of the test solution after reaction...
  67. chemistry

    Elemental antiomony made by these reactions down below: Sb2S3 + 5 O2 - > Sb2O4 + 3 SO2 Sb2O4 + 4 C - > 2 Sb + 4 CO how many grams O2 needed to prepare 1.00g of Sb? how many grams Sb formed when 84.9g of Sb2S3 and 39.0g of O2 r used in first reaction and product formed is...
  68. chemistry

    The fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6 ∘C. The specific heats of C2Cl3F3(l) and C2Cl3F3(g) are 0.91 J/g⋅K and 0.67 J/g⋅K, respectively. The heat of vaporization for the compound is 27.49 kJ/mol. Calculate the heat required to ...
  69. chem

    Because the oxide ion is basic, metal oxides react readily with acids. (a) Write the net ionic equation for the following reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.) FeO(s) + 2 HClO4(aq) Fe(ClO4)2(aq) + H2O(l...
  70. Physics

    In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 93.0 km/h, to his enemy's car, which is going 130km/h. The enemy's car is 17.0m in front of the Indy's when he lets go of the grenade. 1)If Indy throws the grenade so its initial ...
  71. Physics

    In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 93.0 km/h, to his enemy's car, which is going 130km/h. The enemy's car is 17.0m in front of the Indy's when he lets go of the grenade. 1)If Indy throws the grenade so its initial ...
  72. history

    was the anti-immigrant hysteria following world war one simply a continuation of this feeling or was it more a reaction to the wave of immigrants that entered the us in the late nineteenth century---im writing a paper on this, please help A continuation of what feeling? Please...
  73. Solar Energy

    With respect to a PV module's I-V and P-V curves, and the module's operating point, consider the following statements: a) When the operating point of the PV module is on the MPP (maximum power point), \(P_{mpp} \lt V_{oc} \times I_{sc} \) b) For a given Irradiance and ...
  74. math

    parallel and perpendicular lines Determine an equation of each of the following lines . *the line perpendicular to y-4=0 and passing through the point (-1,6) ** the line perpendicular to 3x-12y+16=0 and having the same y-intercept as the line 14x-13y-52=0 and explain ....
  75. physics

    You press down on the gas on your car and accelerate through the mob of zombies in front of you. As you move 65 m through the swarm to get out of the place you've been hiding in, you estimate that the force of your car increases from 200 N to 780 N. Determine how much work ...
  76. English Q's 1-5

    Read the following passage. Then answer questions 1-5 on the online portion of the Unit Assessment. From The Lost Prince By Frances Hodgson Burnett There are many dreary and dingy rows of ugly houses in certain parts of London, but there certainly could not be any row more ...
  77. Chemistry

    Can someone check my answer and let me know me if the are right or wrong. If I wrong can you give me the right answer plz. 1. What is the maximum amount of KCl that can dissolve in 600 g of water? (The solubility of KCl is 34 g/100 g H₂O at 20°C.) * 34 g 204 g 56 g******* ...
  78. math

    can someone help me write the equation of the line 1. parallel to the line x=5 passing through (4,2) 2. perpendicular to the line x=8 passing through (3,4)
  79. Art/English

    For art I have to create this fairytale book. It has to be 8 pages sided. It has to be short, because on each page we are going to illustrate a picture and below that we are going to write a minimum of 2-3 sentences. It has to start with once upon a time and end with happily ...
  80. Chemistry

    1. How is the rate affected by doubling the concentratino? 2. Explain the effect of concentration on the rate of a reaction in terms of the "Collision Theory" of chemical reactions. 3. Considering that 1/Time is proportional to the rate of the reaction how is the rate of the ...
  81. Chemistry

    For the reaction system, 2 H2O(g) + O2(g) == 2 H2O2 (g), the equilibrium concentrations are (H2O2) = 0.120 M; (H2O) = 0.860 M; (O2) = 0.330 M. Calculate the value of Kc for this reaction. A. 0.423 B. 0.872 C. 0.0590 D. 1.31 E. 2.51 I did 0.120 / 0.860 X 0.330 = 4.4228 = 4.23. ...
  82. Chemistry

    Complete and balance the molecular equation, including phases, for the reaction of aqueous copper(II) chloride, CuCl2, and aqueous potassium phosphate, K3PO4. Balance the net ionic equation, including phases, for this reaction.
  83. Physical world science

    A study measuring the max height reached for various launch velocities and obtained the following data: V at m/s max height 0 0 10 28 20 35 30 42 40 49 50 56 60 63 70 70 1. plot the data on a graph 2. draw a best-fit line or curve through the data points
  84. Calculating DH°rxn?

    What is DH°rxn for the following reaction, CH4(g) + 2 O2(g) ---> CO2(g) + 2 H2O(l), given DH°f[CH4(g)] = -74.8 kJ; ...DH°f[CO2(g)] = -393.5 kJ; ...DH°f[H2O(l)] = -285.5 kJ. a. ) -604.2 kJ b. ) 869.7 kJ c. ) -997.7 kJ d. ) -889.7 kJ e. ) 997.7
  85. Chem

    if the pressure was increased in this reaction : 2NO(g)+ O2 =====> 2NO2 <==== wouldnt the product side be favored? Please tell me if I'm right or wrong There are three volumes on the left, two on the right. If pressure is increased, the reaction to the right is favored. ...
  86. Math

    1. Find the next number in the pattern. -1, 3, 7, 11 a. 16 b.77 c.15 <------- d.13 2. Name the property of real numbers illustrated by the question. -2(x+4)=-2x-8 a.Associative prop of multiplication b. commutative prop of addition c. distributive prop <--------- d. ...
  87. Math - average grade

    Does anyone know how to calculate average point grade? I have the following data: grade D - 2 students - 4,9 percent grade C - 6 students - 14,7 percent grade B - 12 students - 29,2 percent grade A - 21 students - 51,2 percent What is the average grade? This is NOT my homework...
  88. Chemistry

    Unknown Acid: #2 Mass of Unknown solid acid transferred:0.414g Volume of volumetric flask: 100.00 mL Concentration of NaOH: 0.0989 M Aliqot of acid titrated with NaOH: 25.00 mL Average volume of Naoh from titration: 13.9 mL Here's where I need help: No of moles NaOH used: ? ...
  89. Chemistry

    The reaction of aqueous aluminum sulfate and aqueous calcium nitrate is represented by the balanced ionic equation. 2Al3+(aq) + 3SO42-(aq) + 3Ca2+(aq) + 6NO3-(aq) → 3CaSO4(s) + 2Al3+(aq) + 6NO3-(aq) Give the balanced formula equation for the reaction. Include the states...
  90. chemistry

    1 2Mg + o2 --> 2Mgo 2 MgCo3 --> MgO + Co2 3 Co2 + Ca(OH)2 --> CaCo3 + h2O 4 Zn + 2HCl --> ZnCl2 + H2 5 2H2 + O2 ---> 2H2O 2 KI + Pb(NO3)2 --> 2KNO3 + PbI2 endothermic is absorbs energy. exothermic is releases energy. which of those reaction are endothermic? ...
  91. Chemistry

    If 2.00 mL of 0.600 M NaOH are added to 1.000 L of 0.850 M CaCl2, what is the value of the reaction quotient and will precipitation occur? I've been trying this problem over and over and haven't been able to get it. I know precipitation will not occur from my previous answer ...
  92. ap physics

    Mass m1 on the frictionless table of the figure below is connected by a string through a hole in the table to a hanging mass m2. With what speed must m1 rotate in a circle of radius r if m2 is to remain hanging at rest? (Use any variable or symbol stated above along with the ...
  93. current physics

    when dealing with circuits, and you say "the voltage across the battery" and "a current through the battery" what do the words across and through mean.
  94. Physics

    Current flow through a lamp is 1.3 A. How many Coulombs of charge are passed through the lamp in 2 minutes? Formula for coulombs and current? Not sure..
  95. Algebra

    A line passes through the points (-10, -4) and (-1, 2). What is the slope of the line that passes through the two points? I keep getting lost in the middle.
  96. math

    Find an equation of the line that satisfies the given conditions. Through (−7, −12); perpendicular to the line passing through (−4, 0) and (0, −2)
  97. How many sig figs?

    An equilibrium mixture of the following reaction was found to have [H2] = 0.020 M and [I2] = 0.020 M at 340°C. What is the concentration of HI? H2(g) + I2(g)--> 2 HI(g) Keq = 69 at 340°C I got .166 but it said check number of sig figs so im guessing its 2 sig figs but I ...
  98. AP Chemistry

    In 1.33L container, 4.20 AB3, is heated to 400C, and 2.98x10-2(negative 2) moles of A is present at equilibrium. AB3(g) <----> A(g)+ 3B(g) (28.23amu) (a.) Write the expression for K (b.) Calculate the equilibrium concentration of the following gases (i.) B (ii.) AB3 (c...
  99. chemistry

    Ethanol (C2H6O) is combusted with oxygen to produce carbon dioxide and wateraccording to the following reaction: C2H6O + 3O2 -----> 2H2O + 3CO2 If 50g of ethanol is combusted, determine the volume of carbon dioxide that will be produced if the temperature is 25oC and the ...
  100. Chemistry

    Can someone please explain this problem to me step by step pleaseeeeeee? In the following acid—base neutralization reaction HNO3 (aq)+ KOH (aq)---KNO3(aq) + H2O(I) What is the molarity (M) of an HNO3 solution if 50.0ml is needed to react with 25.0ml of 0.150M KOH solution?
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