a certain reaction has the following generaln form

74,413 results, page 20

  1. trig

    find the distance from the orgin to each of the following points .If your answer is irrational,leave it in radical form. a.(3,-7) b.(-4,6) c.(0,5) d.(6,0) e.(-2,-4) f.(0,0) my answers : what do they mean by leave it radical form a.sqrt 58 b.Sqrt 52 = 2sqrt 13 or should i just ...
  2. chemistry

    Nitrogen and hydrogen react to form ammonia. Consider the mixture of N2 and H2 in a closed container as illustrated below. Assuming the reaction goes to completion, draw a representation of the product mixture. Explain how you arrived at this representation.
  3. Chemistry

    If a sample of pure hydrogen gas is ignited very carefully, the hydrogen burns gently, combining with the oxygen gas of the air to form water vapor. Write the unbalanced chemical equation for this reaction.
  4. algebra

    If four times a certain number increased by 6 is equal to 94, what is the number? If x represents the number, then which of the following equations could be used to solve the problem? 4x + 6 = 94 or 4(x + 6) = 94
  5. science

    Which of the following statement best describes the two different types of electrical energy involved in the situation above? 1.Both the lightning and the electricity used to light the floor lamp are forms of static electricity. 2. Both the lightning and the electricity used ...
  6. Chemistry

    A 5.80 g sample of SiH4 and an excess of oxygen were placed in a reaction container surrounded by 3.40 kg of water. The initial temperature of the water was 14.10°C. At the end of the reaction, the temperature of the water was 48.90°C. Assume the heat was completely absorbed...
  7. science

    Numbers 1-9 are true and false questions.Check if my answers are right and if I didn't write anything on the blank, I need help with them. Thanks!!!! _____ 1. Velocity could be reported as 50 k/hr. True 2. How far an object travels in a certain period of time is its speed. ...
  8. psychology

    In social psychology whats the term that describes this scenario: someone treats you in a certain way then you respond in a certain way consistent with how you were treated. however, that is the way you wanted to act.
  9. Chemistry

    3.25g of zinc was added to 50cm^3 of a 4.0 molar dm^-3 HCl. When the reaction was completed the temperature rose by 28 degrees celcius. (a) Is the reaction exothermic or endothermic? (b)All the zinc dissolve in this reaction. How many moles of zinc reacted? (c) How many moles ...
  10. chemistry

    a chemical reaction occuring in a cylinder equipped with a moveable piston produces 0.58 mol of a gaseous product. If the cylinder contained 0.11 mol odf gas before the reaction and had an initial volume of 2.1 L, what was its volume after the reaction
  11. chemistry

    For the reaction CO2 + H2 <--> CO + H20 + heat, indicate how the change in condition will shift the equilibrium (ie right or left) a. Removal of CO2 b. Addition of H2 molecules c. Increase volume of reaction vessel d. Addition of catalyst e. Refrigerate reaction vessel
  12. AP Chemistry

    Q - An electrochemical reaction occurs between an unknown element and zinc. The half-cell reaction for the zinc is: Zn(s) → Zn2+(aq) + 2e− The cell potential for the reaction is Eºcell = 1.83 V. Is the reaction spontaneous or nonspontaneous? Explain. What is the ...
  13. Chemistry

    Calculate the enthalpy of formation if 78.5 g of carbon dioxide in the following reaction: C(s) + H2O(g) --> CO2(g) Use the following equations: a) H2O(l) --> H2(g) + (1/2)O2(g): Δ°f = +285.8 kJ/mol b) C2H6(g) --> 2C(s) + 3H2(g): Δ°f = +84.7 kJ/mol c) 2CO2(g) + ...
  14. chemistry

    for the chemical reaction A+B= C+D, the following experimental data were taken to determine the ratelaw equation at 300K. determine the rate law for the chemical reaction. fromthe experiment data i found out the exponetial value... but 300k part confuses me. the equation i got...
  15. Chemistry

    A 1.0-mL volume of 0.010 M H2SO3 is added to a mixture of 12 drops of 0.010 M HIO3, 8 drops of deionized water, and 1 drop of starch solution. a color change occured after 40 seconds. the rate of reaction is measured by the disappearance of HIO3. got the reaction mixture in ...
  16. Math-Algebra 1

    Part 1: When writing linear equations, how do you determine which form of a line to use? Part 2: Choose 1 set of points from the choices below. Then, solve the problem and post your solution, showing your steps. Write an equation in point-slope form for the line that passes ...
  17. Stoichometry

    Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 0.55 mole of sodium carbonate is mixed with one containing 0.55 mole of silver nitrate. After the reaction is complete, the solutions ...
  18. physics

    A resistor (R = 900 ), a capacitor (C = 0.25 µF), and an inductor (L = 2.0 H) are connected in series across a 240 Hz AC source for which Vmax = 140 V. Calculate values for the following. ---I only need help with part c---- c) the phase angle between the current and voltage ...
  19. Chemistry

    For a lab, I had to react toulene with 1% I2 in dichloromethane. Would HI form as a result of this? Logically, I think there would be no reaction because toulene looks too stable. But a colour change occured. Why would this happen?
  20. Chemistry

    A reaction of the form aA---> Products is second order with a rate constant of 0.169 L/(mol*s). If the intial concentration of A is 0.159 mol/L, how many seconds would it taje for the concentration of A to decrease to 6.07X10^-3 mol/L
  21. Chemisty

    A reaction of the form aA---> Products is second order with a rate constant of 0.169 L/(mol*s). If the intial concentration of A is 0.159 mol/L, how many seconds would it taje for the concentration of A to decrease to 6.07X10^-3 mol/L
  22. Chemistry practice

    Using the form of energy diagram,make a concept map of the two different methods of calculation of reaction enthalpy(via the bond enthalpy and via the enthalpy of formation)
  23. Chemistry

    When a wooden log burns it is essentially undergoing a combustion reaction. Explain why the ashes that form when a log burns have a lower mass than the log had before it started burning.
  24. Chemistry

    0.573 g of calcium chloride reacts with excess of 0.5 M Na3PO4 to form .523 g of isolated calcium phosphate precipitate. Determine theoretical yield, actual yield, and percent yield for this reaction.
  25. Chemistry

    Please also, help me set up this problem. Acetylene, C2H2, can be converted to ethane, C2H6, by a process known as hydrogenation. The reaction is C2H2(g)+2H2(g)⇌C2H6(g). Given the following data at standard conditions (all pressures equal to 1 atm and the common ...
  26. Chemistry- Dr. Bob

    Please check the following. 1. What compound is sodium sulfite? My answer:Na2SO3 2. Which element is a noble gas? a. N2 b. Cl2 c. Xe d. I2 My answer: c 3. Which element is most likely to form a cation with a 2+ charge? a. S b. P c. Be d. Al My answer: c 4. Which species ...
  27. ART HISTORY

    Realism by 1860 had lost its political meaning and became also known as A.genre B.naturalism C.minimalism D.humanism its not genra, that is a type or catagory of the form of painting. naturalism is appearence to imitate nature minimalism sounds right to me humanism is used to ...
  28. Math

    1. Write the following reversible as a biconditional: If two perpendicular lines intersect, they form four 90* angles. A) Two intersecting lines are perpendicular if and only if they form four 90* angles. B) Two intersecting, perpendicular lines do not form four angles. C) ...
  29. Chemistry

    According to the following reaction, how many moles of water will be formed upon the complete reaction of 22.6 grams of hydrochloric acid with excess iron(III) oxide? hydrochloric acid (aq) + iron(III) oxide (s)--> water (l) + iron(III) chloride (aq)
  30. precalculus

    Let z1= 3-3sqrt 3i and z2= -11+i. write all answers in polar form with 0< theta< 2pi A. what is z1 in polar form? B. what is z2 in polar form? C. what is z1z2 D. what is z1/z2 E. what is (z1)^5 F. what is (z2) ^1/4
  31. precalculus

    Let z1= 3-3sqrt 3i and z2= -11+i. write all answers in polar form with 0< theta< 2pi A. what is z1 in polar form? B. what is z2 in polar form? C. what is z1z2 D. what is z1/z2 E. what is (z1)^5 F. what is (z2) ^1/4
  32. chemistry

    Instant cold packs, often used to ice athletic injuries on the field, contain ammonium nitrate and water separated by a thin plastic divider. When the divider is broken, the ammonium nitrate dissolves according to the following endothermic reaction: NH_4NO_3(s) rightarrow NH_4...
  33. Chemistry

    for the reaction 4NH3(g) + 5O2(g) <--> 4NO(g) + 6H2O(g) if H = -950kJmol-1, does that mean it's an exothermic reaction? Ooops pressed Post too quickly. Yes it is exothermic. Delta H is negative so heat is lost from the system. If delta H is positive a reaction is ...
  34. Chemistry

    Asprin C9H8O4 is made by the reaction of salicylic acid C7H6O3 and acetic anhydride C4H6O3. The other product in the reaction is acetic acid HC2H3O2. How many of each reactant should be used to produce 75.0g of asprin. Assume that the reaction gives a 68.2% yield.
  35. history

    HISTORY QUESTIONS PLEASE HELP!!!! Why were rituals an important part of American Indian religion?(1 point) A. many tribes used rituals as a form of retaliation against other tribes. B. Many tribes did not believe in an afterlife. C. Many tribes believed in performing certain ...
  36. chemistry

    The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
  37. chemistry

    A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are as follows: 10FeSO4 + 5 H2SO4 --> 5 Fe2(SO4)3 + 10 H ^+ +10e^- and 2 KMnO4 + # H2SO4 +10e^- --> 2 MnO4 + K2SO4 + 8 H2O. The gram-...
  38. chemistry

    So I posted this question yesterday and was told I had a few typos.... I fixed them and here is the question again... Please help me!!! A solution of ferrous sulfate (FeSO4) is titrated with a solution of potassium permanganate in sulfuric acid. The balanced half reactions are...
  39. chemistry

    In a certain trial, the initial concentrations of Fe3+ and SCN- are both 1.00x10^-3 M and the initial concentration of FeSCN2+ is zero. Suppose that after the reation reaches equilibrium, the concentration of FeSCN2+ was found to be 1.19x10^-4 M. Use this information to ...
  40. Chemistry

    The equilibrium constant is 16 for the gas phase reaction SO2 + NO2 <--> SO3 + NO at a certain temperature. If 3.0 moles each of SO2 and NO2 are placed together in an empty 1.0 liter flask and the system is allowed to come to equilibrium at this temperature, what will be...
  41. Law

    1. Which of the following is NOT helpful to a judge in determining potential risk? A. The PSI B. STICS C. A risk and needs assessment D. The LSI-R is it A 2. Which of the following statements is NOT true about drug courts? A. They are a form of diversion. B. Each court differs...
  42. Chemistry

    For a reaction N2+O2=2NO If Kc=10-30 at 25°C One Can predict (1) More NO is formed (2) The forward reaction goes to completion (3) The backward reaction goes to completion (4) More reactant can consumed
  43. Civics

    Which of the following is true about laws in the united states? They are made by the police The forbid or require certain actions*** They are invalid unless every citizen has voted to accept them They prevent criticism of the government.
  44. Math

    The following rational function describes blood concentration of a certain drug taken via IV over time, find a. the horizontal or oblique asymptotes b. the vertical asymptote c. describe their possible meanings f(x)= x+1/x
  45. Chemistry

    If at a certain instant during the course of the reaction 2 NO2(g) + F2(g) ¨ 2 NO2F(g), the rate of formation of the product were 0.16 mol/L∙s, how fast would the F2 be disappearing (also in mol/L∙s) at that same instant in time? A) 0.16 mol/L∙s B) 0.080 ...
  46. Chemistry

    Given the following hypothetical equations, 2A + B → 3C + 2D ΔH = -46.7kJ C → B ΔH = 13.1kJ 2E → B ΔH = 84.5kJ, what is the enthalpy change (kJ) for the following reaction? A → D + 2E
  47. Math

    The batteries from a certain manufacturer have a mean lifetime of 890 hours, with a standard deviation of 90 hours. Assuming that the lifetimes are normally distributed, complete the following statements.
  48. CHEMISTRY

    A lamp of marble chips was dropped in excess 0.1mol/dm hydrochloric acid and observed for sometime. (a) State what you would see. (b)Describe how the rate of reaction changed with time. (c)Explain why the reaction stopped after sometime. (d)The reaction was rather slow.State ...
  49. Chemistry

    (a) The figure above shows how the energy of a system varies as a chemical reaction proceeds. Match the numbers features labeled on the figure above to their corresponding statements below: energy state of the reactants: 1/2/3/4/5 activation energy of the reaction: 1/2/3/4/5 ...
  50. stoichiometry

    1.how many mole, Fe can be made from Fe2O3 by the use of 20 moles of carbon monoxide, CO in the following reaction? Fe2O3+ 3CO = 2Fe+ 3CO2 2. How manhy moles of H2O are produced when 2.75 moles of O2 are consumed if burning methyl alcohol, CH3OH, according to the following ...
  51. 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 ...
  52. Marketing

    Need help unscrambling the following letters to form a word. coppscryhsghai
  53. math?

    Simplify each of the following, if possible. Write your answers in exponential form, a^b 3^4*3^7*3^6 2^80+3*2^80
  54. math

    convert each of the following rational numbers to the form a/b, where a and b are integers and b not equal to 0.
  55. chemistry

    Write formulas for the compounds that form from {\rm Rb} and each of the following polyatomic ion: {\rm NO}_{3}^{-}, {\rm SO}_{4}^{2-}, {\rm PO}_{4}^{3-}.
  56. math

    Simplify the following quotient of complex numbers into the form a + bi. -8-8i/1+2i
  57. Algebra

    put the following into mx+b form. x+1/6y=1/2 I got either y=-x+1/12 y=-x+3 I don't know which one.
  58. maths

    write the following numbers in standard form. i.49800000 ii.0.000003
  59. algebra2

    simplify the following quotient of complex numbers into the form of a+bi -9+8i/1+2i
  60. math

    Take the following out of fraction form tan^2x/cscx+1
  61. MATH

    Write the following expression as a complex number in standard form. 2-7i/-3+8i
  62. Math

    Which of the following expressions is the simplified form of -8+3(2p-4)+10p ? A. 16p-20 B. 8p-10 C. 6p-12 D. 12p-9
  63. Math

    Write the following complex number in polar form: z = 4 − 4i
  64. MATH

    Write an equation in point slope form given the following M=2/9 (-1,5)
  65. MATH

    Write an equation in point slope form given the following M=2/9 (-1,5)
  66. Algebra

    what is the equation, in standard form, of a parabola that contains the following points? (-2-20). (0-4), (4-20)
  67. math,help me please!

    how to write the following value in expanded form: 30.06 answer:
  68. math

    show that the following are rational number , by written then in the form a/b 7, 2x1/2 , 0.8
  69. Algebra 1

    Rewrite the following equation in slope-intercept form: 8x-10y=-9 Thank you.
  70. algebra1

    Match each of the following with the equation written in Point-Slope form. y+5=3(x−3)
  71. Chemistry

    Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance? 1. NaCl(aq) and LiNO3(aq) 2. KCl(aq) and AgNO3(aq) 3. KCl(aq) and LiCL(aq) 4. NaNO3(aq) and AgNO3(aq) I know the answers 2 but I have no idea why.. thanks.
  72. chemistry

    In the formation of acid rain, sulfur dioxide reacts with oxygen and water in the air to form sulfuric acid. Write the balanced chemical equation for the reaction. (Type your answer using the format CH4 for CH4.)
  73. applying stoichiometry

    10.0 g aluminum reacts with 66.5g bromine to form 65.0g aluminum bromide. determine the limiting reactant and calculate the theoretical and percent yield. once the reaction has occured as completely as possible, what mass of the excess reactant is left?
  74. Chemistry

    Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K If a reaction mixture initially contains 319torr of CO and 220torr of Cl2, what is the mole fraction of COCl2 when equilibrium is reached?
  75. chem

    I have the following problems- write net ionic equations for reactions if no reaction write NR.... silver nitrate and ammonium carbonate sodium phosphate and potassium nitrate silver nitrate and barium chloride copper (II) chloride and sodium hydroxide cobalt (III) chloride ...
  76. chemistry

    "Ag(s) reacts with none of the 4 (solutions of Ag^+2, Pb^+2, Cu^+2, Zn^+2}. So Ag(s) goes at the bottom of the table for now although there may be some metals below silver when you finish with the entire table. Cu(s) reacts with (Ag^+ solution) so Cu goes above Ag ion. It is ...
  77. Chemistry

    Which of the following surfaces does a true monolayer always form on? A. silicon B. gold C. both D. neither Why are silicon surfaces studied in this experiment? A. Silicon is shiny like the windows in tall buildings. B. Silicon more closely represents environmentally relevant ...
  78. Chemistry (1Question)

    This is really confusing. I know how to do the equilibrium which also has to do with reaction rates but they didb't give it to me as a choice. Please Please help me. I post other questions that i answered already but no one answered me. I just needed someone to check them for ...
  79. math

    Can someone please check ny answers and tell me if I'm correct? I did the FOIL method for each of these.. 1.What is the simplified form of (x-2)(2x+3) My answer; 2x^2-x-6 2.What is the simplified form of (3x+2)(4x-3)? My answer; 12x^2-x-6 3.What is the simplified form of (4p-2...
  80. Chemistry

    Is the reaction of 8 grams of natural gas and 38 grams of oxygen gas to form 17 grams of carbon dioxide in 19 grams of water consistent with the law of conservation of mass?
  81. calc

    You have been hired as a marketing consultant to Johannesburg Burger Supply, Inc., and you wish to come up with a unit price for its hamburgers in order to maximize its weekly revenue. To make life as simple as possible, you assume that the demand equation for Johannesburg ...
  82. Chemistry

    Calculate the cell potential for the following reaction as written at 25.00 °C, given that [Zn2 ] = 0.842 M and [Ni2 ] = 0.0100 M. Standard reduction potentials can be found here. reaction: Zn(s)+Ni^2+(aq)--->Zn^2+(aq)+Ni(s) standard reduction Zn: -.76 standard reduction ...
  83. chemistry

    A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reaction mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl taken. The answer 3.78g who helps me
  84. LA check work

    Hello could you check my work on these two questions? Question one: How do you form the perfect tense of a verb? A. use the helping verb will and the base form of the verb B. use a form of the verb have and the present particle of the verb C. use a form of the verb have and ...
  85. chemistry

    write a balanced chemical equation for the following reaction including states not complete; no question.
  86. chemistry

    Predict wheter or not the following reaction will be spontaneous, please explain Br2(l) + Cl2(l) + 29.3 kJ --> 2 BrCl(g)
  87. chemistry

    how many molecules of Xef6 are formed from 12.9L at 298K and 2.6atm according to the following reaction. assume excess is Xe
  88. Chemistry Check

    Which one of the following substances is the product of this combination reaction? Al(s) + I2(s) => ______ For this it would be AlI3 ?
  89. chemistry

    assuming the following reaction proceeds in the forward direction, what is oxidized and what is reduced? Cu2+ (aq) + Ca(s) --> Cu (s) + Ca2+ (aq)
  90. chemistry

    How many moles of ammonia gas can be produced from the reaction of 3.0L of N2 and 3.0L of H2 according to the following equation: N2(g) + 3H2(g)---> 2NH3(g)?
  91. CHEMISTRY

    how much energy would be released in the following reaction CH4 + 2O2--> CO2 + 2H2O
  92. chemistry

    what is the reaction with sodium hydroxide for the following metals: Al3+ Fe3+ Mn2+ Ni2+ Zn2+
  93. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
  94. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
  95. Chemistry

    Balance the following redox reaction in acidic solution: H3PO4 + HNO2--> N2O4 + H3PO3
  96. Chemistry

    In the following reaction, which substance is acting as the Brønsted-Lowry acid? NH3 + H2O NH4+ + OH
  97. chemistry

    write the net ionic equation of the following reaction: HCl(aq)+NaOH(aq)--> NaCl(aq)+H2O(l)
  98. chemistry

    When the following reaction is balanced in acid solution, the coefficient of H+(aq) will be: Cr2O72-(aq) + Sn2+(aq) --> Cr3+(aq) + Sn4+(aq)
  99. Chemistry

    The following reaction has a Delta G value of 42.6 kJ/mol at 25oC: HB(aq) +H2O(l) --> H3O+(aq) +B-(aq) Calculate Ka for the acid HB.
  100. chemistry

    Determine the entropy change for the following displacement reaction Cl2(g) + PbBr2(aq) --> PbCl2(aq) + Br2(l
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