a certain reaction has the following generaln form

74,738 results, page 39

  1. CHEMISTRY

    For the following reaction, what mass of SIC is made from120.2g of SIO2 and 120g of C? SiO2(s) + 3C(s) ---SiC(s) +2CO(g)
  2. CHEMISTRY

    For the following reaction, what mass of SIC is made from120.2g of SIO2 and 120g of C? SiO2(s) + 3C(s) ---SiC(s) +2CO(g)
  3. chemistry

    Calculate the standard free-energy change for the following reaction at 25 °C. 2Au^3+(aq) + 3Ni(s) -->2Au(s) + 3Ni^2+(aq)
  4. CHEMISTRY

    The equilibrium constant KP for the following reaction is 4 atm^2 at 300 K. AB(s) ---> A(g) + B(g) What is the equilibrium pressure of A(g) and B(g) above AB(s) at 300 K? What is KC at 300K?
  5. chemistry

    Given the following information: Ni(OH)2(s) Ni2+(aq) + 2 OH (aq) Ksp=6.0 x 10 16 H2O(l) H+(aq) + OH (aq) Kw=1.0 x 10 14 What is the equilibrium constant for the reaction, Ni(OH)2(s) + 2 H+(aq) Ni2+(aq)+ 2 H2O(l)
  6. 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 ...
  7. Statistics

    . Suppose a certain species of fawns between 1 and 5 months old have a body weight that is approximately normally distributed with mean kilograms and standard deviation kilograms. Let x be the weight of a fawn in kilograms. Convert the following x interval to a z interval. ...
  8. ENGLISH

    6. The following words share a denotative meaning. Which one has a negative connotation? (1 point) confident certain decisive demanding ~ 7. Read the following Chippewa song. Identify its purpose. A loon I thought it was But it was My love's splashing oar. (1 point) to ...
  9. Math

    A pathologist, trying to identify a bacterial infection, places a sample in a growth chamber and measures 1000 bacteria at the end of day 5 of the test. From daily measurements, the growth rate of the number of bacteria is determined to be 5% per day. Note that: A linear ...
  10. maths PLEASE HELP

    Can you give me some help with this question im not sure how to even start in a reaction A to P the mass of A at any given time T is Mt and the rate of transformation of A at time T is prportional to Mt given that the original mass of A is 130g and that 50g has been ...
  11. Spanish please help

    I have no idea how to do these. Will somebody please help. Thank you so much. 3. Fill in the blank with the correct verb form: yo/pensar. Yo __________ 4. Fill in the blank with the correct verb form: ella/entender. ella __________ 5. Fill in the blank with the correct verb ...
  12. Into. Chemistry

    I'm trying to do this precipitation reaction problem, but I don't understand part of it. The question is: Does a precipitate form when aq. soultions of potassium nitrate (KNO3) and sodium iodide (NaI) are mixed? Then it lists the solutions for the two: KNO3(aq) --> K+(aq...
  13. Chemistry

    catalyst: a substance that changes the speed of a chemical reaction without affecting the yield or undergoing permanent chemical change* As you can see NO (nitrogen monoxide) did not undergo a permanent change. *http://www.chem.purdue.edu/gchelp/gloss/catalyst.html Lance, ...
  14. CHEM-last part prob.

    Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s) + 3Cl2(g) -> 2AlCl3(s) You are given 19.0g of aluminum and 24.0g of chlorine gas. a)If you had excess chlorine, how many moles of of aluminum chloride could be produced from 19.0g...
  15. Math

    It takes 11 cups of flour to make 3 loaves is bread. What is the ratio of cups of flour to loaves of bread? Write the ratio 3 ways: Word form: Colon form: Fraction form:
  16. physics

    You pull a short refrigerator with a constant force across a greased (frictionless) floor, either with horizontal (case 1) or with tilted upward at an angle 38° (case 2). (a) What is the ratio of the refrigerator's speed in case 2 to its speed in case 1 if you pull for a ...
  17. math

    The number of individuals N in a population of a certain species is given by the following function of time, t: N(t)= 100/(1+9e^-t), t>=0 a.)how many ppl are in the population initially(at t=0) b.)determine the size ofa the populations as tgoes towards infiniti? c. what is ...
  18. Math

    The standard form of a circle is Ax^2+Cy^2+Dx+Ey+F=0. Write the equation for the circle: Center (1,2), point on the circle (-2,-1). Okay, I've always put circles in the form (x-h)^2+(y-k)^2=0. I got this: r^2=(x-1)^2+(y-2)^2 then I substitute the point to find the radius: r^2...
  19. AP Chem

    For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a constant ...
  20. Separation of Racemate- Chemistry Lab

    Compare the relative reaction rates of 1-bromobutane, 2-bromopropane, and 2-bromomethylpropane under SN1 reaction conditions. Silver nitrate will be used to provide nitrate ion as the nucleophile to produce alkyl nitrates as products. 1) You have a choice of acetone or ethanol...
  21. Chemistry

    The following reaction represents the decomposition for water: 2H2O - 2H + O How many molecules of hydrogen are produced from the decomposition of 12.2 grams of water into its elements?
  22. Chem B

    What mass of acetylene, C2H2, will be produced for the reaction of 90.g of calcium carbide, CaC2, with water in the following reacion? CaC2(s) + 2H20(l) ---> C2H2(g) + Ca(OH)2(s)
  23. Chemistry

    Given the following reaction: HCl(g) + SrO(s) ¨ SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 11.44 kg SrO.
  24. Chemistry

    Given the following two step reaction: 4 P + 5 O2 -> P4O10 P4O10 + 6 H2O -> 4H3PO4 If you have 8.28 g of P, 15.65 g of O2, and 19.95 g of H2O, how many grams of H3PO4 can be produced?
  25. Chemistry

    In the following reaction, how many liters of oxygen will react with 124.5 liters of propane (C3H8), at STP? C3H8 + 5O2 = 3CO2 + 4H2O
  26. Chemistry

    At 25°C, Kp 1 10-31 for the following reaction: N2(g) + O2(g) 2 NO(g) Calculate the concentration of NO, in molecules/cm3, that can exist in equilibrium in air at 25°C. In air, PN2 = 0.8 atm and PO2 = 0.2 atm.
  27. Chemistry

    1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
  28. Chemistry

    1.Write an equilibrium constant equation for the following reaction: 4NH3(g)+5O2(g)= 4NO(g)+6H2O(g) 2. What does the above [] mean in the above equation?
  29. Chemistry

    If 4.41 moles of C5H12 react with excess O2, how many moles of CO2 will be produced in the following combustion reaction? C5H12+8O2 --> 6H2O+5CO2
  30. Chemistry

    Calculate the enthalpy change, ∆H in kJ, for the reaction H2O(s) → H2(g) + 1/2O2(g) Use the following: A. –291.9 kJ B. +291.9 kJ C. –279.9 k D. +279.9 kJ D??
  31. science

    If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
  32. science

    If 0.188 moles of zinc reacts with excess lead(IV) sulfate, how many grams of zinc sulfate would be produced in the following reaction?
  33. chemistry help ?!

    Which of the following is an exothermic reaction? sugar dissolving in water <<my choice an explosion tea dissolving in water the cooling of an ice pack
  34. Chemistry

    What volume of N2O (s) will be generated if 3.13 g of NH4NO3 (s) decomposes at 1.00 atm and 50 degrees celsius, given the following decomposition reaction: NH4NO3 (s) --> N2O (g) + 2 H2) (l)?
  35. Chemistry

    1. What is the reaction between copper(II) sulfate and barium hydroxide? 2. What is the reaction between thiocyanate and iron(III) nitrate? 3. What is created when hydrogen peroxide is heated? 4. What is produced when HCl and KMnO4 is mixed?
  36. Chemistry

    If the initial rate of reaction is observed to increase by a factor of nine when the concentration of a reactant is tripled, what is the order of reaction with respect to that reactant? a)0 b)1 c)2 d)3 e)5 I think it's c am i right? Explain in case i'm misreading the question.
  37. Chemistry

    2 NO + O2 --> 2 NO2 The reaction rate is increased five­fold when the temperature is  increased from 1400 K to 1500 K. What is the activation energy for the reaction?  I have no idea how to do this and would greatly appreciate some urgent help!
  38. Chemistry

    A reaction : A(aq)+B(aq) --> C(aq) has a standard free-energy change of –4.01 kJ/mol at 25 °C. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively? I used deltaG...
  39. chemistry

    By applying Le Châtelier’s principle to a reaction that has come to equilibrium, the reaction can be made to A. produce more reactants. B. run to completion. C. reach a new chemical equilibrium. D. All of the above Is the answer D?
  40. science

    Phosphoric acid is very important compound used to make fertilizers.PPhosphoric acid can be prepared in two ways: Reaction 1: P4 + 5O2 = P4O10. Reaction 2: P4O10 + 6H29 = 4H3PO4. Supposing we allow 272 g of phosphorus to react with excess oxygen which forms tetra phosphorus ...
  41. Gen Chem

    Consider the following reaction, A <===> B in a 1.00L container. At 1.77°C, the molar concentrations of A and B, respectively, 5.838M and 3.945M. Suddenly, 8.744 moles of A are added to the system. What is the change in DG of the system. Give the answer in kJ?
  42. Gen Chem

    Consider the following reaction, A <===> B in a 1.00L container. At 1.77°C, the molar concentrations of A and B, respectively, 5.838M and 3.945M. Suddenly, 8.744 moles of A are added to the system. What is the change in DG of the system? Give the answer in kJ?
  43. chemistry

    If 11.53g hydrogen sulfide reacts with 3.97g oxygen gas in the following reaction: 2H2S + O2 + H2O which is the maximum mass of sulfur that can be produced? which is the limiting reactant ? which reactant is in excess ? by how many grams?
  44. chem

    How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, measured at STP, completely reacts with magnesium metal according to the following reaction? i got .496 g but i know that like way off
  45. Chemistry

    Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction:H3PO4 + Mg(OH)2 -----> Mg3(PO4)2 + H2O.Balance the equation, then enter the coefficients
  46. Chemistry Help Please

    Using standard thermodynamic data from Appendix L of your text, calculate the equilibrium constant at 298 K for the following chemical reaction: CO(g) + H2O(l) CO2(g) + H2(g). Show work please! Thank you!!!
  47. Chemistry

    Assume that you start with 2 mole(s) of magnesium metal, determine: The number of grams of MgO(s) that would be produced in the following reaction (enter your answer with 4 significant figures): Mg(s) + 1/2O2(g) → MgO(s)
  48. chemistry

    At 35°C, Kc = 1.6 X 10-5 M for the reaction 2NOCI(g) 2NO(g) + Cl2 (g)' Calculate the concentrations of all species at equilibrium for each of the following systems. Note any simplifying assumptions made in the calculations. 3.0 mol NO(g) and 1.0 mol ofCl2(g) in a 1.0 L flask
  49. Chemistry

    Which of the following changes would shift the reaction shown here to the right (product side)? 4HCl (g) + O2(g) < = > 2Cl2 (g) + 2 H2O (g) addition of Cl2*** decrease of pressure increase of pressure removal of O2
  50. Chemistry

    Which of the following changes would shift the reaction shown here to the right (product side)? 4HCl (g) + O2(g) < = > 2Cl2 (g) + 2 H2O (g) addition of Cl2*** decrease of pressure increase of pressure removal of O2
  51. Mathematics

    Express the Complex Number -1-i in polar form. how is complex no expressed in polar form? what is polar form of complex no? Please help
  52. chemistry

    Consider the following equations. For each, decide whether it represents a chemical reaction or a physical change. a. SnCl4(aq) + 4H2O(l)  Sn(OH)4(s) + 4HCl(aq) b. 4K(s) + O2(g)  2K2O(s) c. NaCl(s)  Na+(aq) + Cl-(aq)
  53. AP Chem

    At a particular temperature, K = 1.00 102 for the following reaction. H2(g) + I2(g) 2 HI(g) In an experiment, 1.23 mol H2, 1.23 mol I2, and 1.23 mol HI are introduced into a 1.00 L container. Calculate the concentrations of all species when equilibrium is reached.
  54. Chemistry

    For the following reaction KClO4 → KCl + 2O2 Assign oxidation states to each element on each side of the equation. Reactant Product K Cl O Which element is oxidized? Which element is reduced?
  55. Chemistry

    Consider the following reaction, equilibrium concentrations, and equilibrium constant at a particular temperature. Determine the equilibrium concentration of SO2(g). 2SO2(g)+O2(g)=2SO3(g) Kc=1.7*10^8 [SO3]aq=0.0034 M [O2]aq=0.0018 M
  56. Chemistry

    Last week we drew Lewis dot structures of azide (N31-), a crucial component in automobile collision safety airbags. During an impact, a sensor ignites a detonator cap that sets off the following rapid reaction: 2NaN3(s) → 2Na(s) + 3N2(g) Part A What mass of sodium azide...
  57. chemistry

    6.Answer the following questions about BaC2O4 and its hydrate: A. calculate the mass percent of carbon in the hydrated form of the solid that has the fromula BaC2O4 * 3H2O
  58. Algebra

    Can some one tell me if I have done this right? Write an equation in standard form with only intergers for the following line. The line with slope 6/7, through (0,7) y=mx+b y=6/7x+7 -6/7 -6/7 -7*(6/7x+y)=7*-7 6-7y=49
  59. chemistry

    Propane is widely usid in liquid form as a fule for barbecue grills and camp stoves for 58.5g of propane, calculate the following quantities. The grams of carbon?
  60. grammar

    Underline the singular noun in each sentence, then write the plural form of the word you underlined. The sentence is the following. They are planning several projects for the year ahead.
  61. math

    for the given functions f and g, find the specified value of the following functions and state the domain of each one. f(x)=2+3/x; g(x)=3/x a.(f-g)(2)= b.(f/g)(3)= how do I do this? I need help! it throws me off because of it being in fraction form.
  62. Calculus Please Need Urgent3 :/

    Find the derivative of the following function using the appropriate form of the Fundamental Theorem of Calculus. F(x)= (s^2)/(1+3s^4)ds from sqrtx to 1 F'(x)=? Thank you so much guys!
  63. Art

    Which of the following subjects enabled artists to begin using clay to form art? 1. Language arts 2. Social Studies 3. Mathematics 4. Science *** I think its D.
  64. chemistry

    The rate constant for this reaction was found to be 0.00550 s-1. What is the instantaneous rate of reaction when the concentration of dinitrogen pentoxide is 0.100 M? Rate = k[N2O5].
  65. Chemistry

    At the start of the reaction there are 0.714 mole of H2, 0.984 mole of I2, and 0.886 mole of HI in a 2.70 L reaction chamber. Calculate the concentrations of the gases at equilibrium.
  66. chemistry

    statement that is wrong about transition elements is 1) they have fixed oxidation states 2) they show paramagnetic behavior 3) they form interstitial compounds 4) they form complexes
  67. algebra

    Find the greatest common factor of 270 and 360. (Give the answer in the numerical form in the top box and in exponential form by filling in the boxes for exponents.)
  68. algebra

    Find the greatest common factor of 270 and 360. (Give the answer in the numerical form in the top box and in exponential form by filling in the boxes for exponents.)
  69. Chemistry

    2Mg + O2--->2MgO If more magnesium is added a.the reaction will shift to the right. b.the reaction will shift to the left. c.there will be no shift. and why im confused on why it would happen.
  70. Chemestry

    Question 1) Consider the following reaction of calcium hydride (CaH2) with molten sodium metal:CaH2(s) + 2 Na(l) -> 2 NaH(s) + Ca(l) Identify the species being oxidized and the species being reduced? Question 2) Give the names to the binary compounds listed below. Classify ...
  71. Inorganic chemistry

    E naught cell for the following galvanic cell is +0.254V. Hg^2+(aq) + 2I^-(aq) ==> 2 Hg(l) +I2(s) What is the change G naught for this reaction?
  72. Chemistry

    The products for the following: CaCl2(aq) + K2CO3(aq) ¨ A. CaCO3(s) + 2KCl(aq) B. CaCO3(aq) + 2KCl(s) C. none of these D. no reaction
  73. Chemistry

    For the following redox reaction, identify the oxidizing agent and the reducing agent. Cu(NO3)2 (aq) + Mg(s) ® Cu(s) + Mg(NO3)2 (aq
  74. Chemistry-DrBob222

    A piece of solid magnesium is reacted with hydrochloric acid to form hydrogen gas: Mg (s) + 2HCl (aq) ---> MgCl2 (aq) + H2 (g) What volume of hydrogen gas (in mL) is collected over water at 25 degrees Celsius by reaction of 0.450 g of Mg (AW= 24.3 g/mol) with 50.0 mL of 1.0...
  75. science

    A scientist is studying a chemical reaction. She predicts that after the reaction the product will have less chemical potential energy than the reactants had originally. The scientist observes the reaction, and notes that no light or sound is produced. However, other ...
  76. Chemistry

    For the reaction 2CH3OH + 3O2 → 2CO2+ 4H2O, what is the maximum amount of CO2 which could be formed from 13.97 g of CH3OH and 5.45 g of O2? Answer in units of g. Consider the reaction H3PO4 + 3NaOH → Na3PO4 + 3H2O. How much Na3PO4 can be prepared by the reaction of...
  77. chemistry

    I have to draw the QMM of CL2C2. For the Lewis structure i think that the two C atoms form a triple bond and the Cl atoms form single bonds. Cl | C'triple bond'C | Cl Therefore i think that the central C atom hybridizes into sp. if this is correct, my question is how do i know...
  78. science - chemistry pH problems

    Here is the hint I received on how to solve those tough pH problems I posted earlier: Both of these can be solved using the H-H and doing the algebra. The math itself is hard to type out, but in Q1 the values of [NaA] and [HA] are 0.04805 and 0.15195. In Q2 you will have to ...
  79. science help check

    3. A metal from group 1 and a nonmetal from group 17 are? A. Not likely to bond B. Likely to form a covalent bond C. Likely to form a ionic bond D. Likely to form a metalloid is it c pls help me
  80. Science

    A metal from group 1 and a nonmemtal from group 17 are A.not likely to bond B. Likely to form a covalent bond C. Likely to form a ionic bond** D. Likely to form a metalloid I think it's c am I right?
  81. chemistry

    A student weighed out 1.5g of salicylic acid into a flask and then added 4ml of acetic an hydride to react. He also added 5 drops of concentrated sulfuric acid. Density of acetic an hydride is 1.08g/ml and sulfuric acid is 1.85g/ml (sulfuric acid is a catalyst in this reaction...
  82. Spanish

    I don't want the answer just check because I'm unsure 1) Definite article for the following noun? maestra el <--- la las 2) Definite article for the following noun? clase las los la <--- el 3) Indefinite article for the following noun examenes? unos <---? or un unas ...
  83. Physics

    There is current of 115 pA when a certain potential is applied across a certain resistor. When that same potential is applied across a resistor made of the identical material but 30 times longer, the current is 0.044 pA. Compare the effective diameters of the two resistors. d2...
  84. chemistry

    Consider the following reaction at 298 K: C(graphite) +2Cl2 (g) -----> CCl4(l) Calculate the following quantities. Delta H: -139 kJ/mol deltaS(sys)=? J/mol*K deltaS(surr)=? J/mol*K deltaS(univ)=? J/mol*K My answer is: deltaS(sys)=654.9J/mol*K deltaS(surr)=0.4664 J/mol*K ...
  85. Chemistry

    NH4Cl(s) → NH3(g) + HCl(g) ΔH°=176 kJ/mol At 25 °C, this reaction has a ΔG° of 91.1 kJ/mol. What is the ΔS° of this reaction? I came up with the solution of 0.896 kJ/mol. Is this correct?
  86. math

    write the following square root in the form a root b . where a and b are integers and b has the least value possiable. 3 root 7?
  87. math

    write the following square root in form a root b where a and b are intergers and b has the least value possible . root 45=
  88. Chemistry

    In an exothermic reaction, is the heat of the reation less than, greater than, or equal to zero? In an endothermic reaction, is the heat of reaction less than, greater than, or equal to zero?
  89. physics

    An airplane of a certain density and shape flies at a constant speed. To do so, it must fly with a certain velocity v0. If the size of the airplane is scaled up in length, width, and height by a factor of two, it can only fly above a new velocity v1. What is v1/v0? Details ...
  90. politics

    What was the White House reaction to Lesley Stahl’s critical report on Reagan’s use of television? A. CBS News was excluded from White House press conferences. B. Stahl was honored at a White House ceremony. C. The reaction was very positive, because of the good pictures ...
  91. Science

    Hydrogen gas(H2) and chlorine gas (CL2) react to form hydrocloric acid (HCL). What is the correct balanced chemical equation for this reaction? A-2H2+2CL2->HCL B-H2+CL2->2HCL C-2H2+CL2->2HCL D-H2+CL2->HCL I think C Pls Help me
  92. Biology

    9. a molecule shaped like a spiral staircase (double helix) is a typical of a. deoxyribonucleic acid b. ribonucleic acid c. carbohydrates d. both a and b D? 10. ATP is important to living organisms because it a. stores hereditary information b. stores energy from food to be ...
  93. Biology

    9. a molecule shaped like a spiral staircase (double helix) is a typical of a. deoxyribonucleic acid b. ribonucleic acid c. carbohydrates d. both a and b D? 10. ATP is important to living organisms because it a. stores hereditary information b. stores energy from food to be ...
  94. math

    find the slope intercept form for the line satisfying the following conditions: y-intercept=2 y-intercept =2/3
  95. Algebra II

    Determine if the following equation is linear. -7^2+y^2-y^2=3x+7 Linear and Standard Form ______________ or Non Linear
  96. algebra

    find the slope-intercept form for the line satisfying the following conditions: x-intercept 3, y-intercept 2/3
  97. physics

    Determine the stopping distances for a car with an initial speed of 93 km/h and human reaction time of 3.0 s for the following accelerations. (a) a = -4.0 m/s2 , but has changed from what was graded. m (b) a = -8.0 m/s2 but has changed from what was graded. m
  98. chemistry

    Given the following reaction: HCl(g) + SrO(s) → SrCl2(s) + H2O Calculate the mass of HCl in grams that would react with 7.70 kg SrO
  99. chemistry

    In the following reaction, how many grams of chlorine can be produced if 120 grams of titanium chloride (TiCl4) reacts with oxygen: TiCl4(g) + O2(g) TiO2(s) + Cl2(g)
  100. Chemistry

    The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) = CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?
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