a certain reaction has the following generaln form

74,413 results, page 100

  1. Chemistry

    So I am writing a lab report and Im stuck with calculating the enthalpy change of combustion of the following reaction: Mg+2HCl--> MgCl2+H2 .I am given the mass of Mg which is 5g and the concentration of HCl which is 2M and the volume of HCl which is 50 cm^3.I found the ...
  2. Chemistry

    A solution is created by dissolving 13.0 grams of ammonium chloride in enough water to make 265 mL of solution. How many moles of ammonium chloride are present in the resulting solution? When thinking about the amount of solute present in a solution, chemists report the ...
  3. English

    Can you please check these sentences for me? Thank you very much. 1)Nature is personified. 2)The humans (or people, human beings) don't have time to observe her beauty as cows an sheep do. 3) We don't have time to turn at Beauty's glance and see how her feet can dance. 4) The ...
  4. Chem

    A carless chemistry student pours 200 grams of methanol, a flammable substance into the sink. Another careless chemistry student causes the bad situation to get even worse by dropping a lit match into the sink. The metanol burns completely with 300 grams of oxygen from the air...
  5. physics

    Which of the following is correct for the nuclear fission reaction? Choose one answer. a. The mass of the daughter nucleus is always greater than the mass of the parent nucleus. b. The mass of the daughter nucleus is always less than the mass of the parent nucleus. c. The mass...
  6. chemsitry

    acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous aspirin at body temperature (Ka at 37 C = 3.6 x 10-4) is this correct? initial concentration is 0.040 M. let change in concentration to equilibrium ...
  7. chemistry

    acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous aspirin at body temperature (Ka at 37 C = 3.6 x 10-4) is this correct? initial concentration is 0.040 M. let change in concentration to equilibrium ...
  8. English

    In the poem "Dream Deferred" by Langston Hughes, what does the term "dream deferred" mean? Also, in the US, what are some groups that have been exposed to predjudice? I have some: African Americans, immigrants Can anyone think of any others Any dream that people put off ...
  9. biology

    I have some questions that relate to table 2.1 which lists the chemical elements that occur naturally in the human body. Similar percentages of these elements are found in most living organisms. a. In what abiotic (non-life) chemical forms are these elements often found in ...
  10. History

    Which option accurately describes the impact the Columbian Exchange had on the indigenous people of the Americas? A. The Columbian Exchange enabled the trade of the coca plant, which was later made into an early form of cocaine. B. Europeans brought disease in the form of ...
  11. History

    Which option accurately describes the impact the Columbian Exchange had on the indigenous people of the Americas? A. The Columbian Exchange was a barter system between European explorers and the indigenous people, who exchanged gold for rum and spices. B. Europeans brought ...
  12. Chemistry

    Would a substance that does not form hydrogen bonds have a high or low surface tension? What about vapor pressure, specific heat,heat of vaporization or boiling point? It requires extra energy to break hydrogen bonds so a substance that does not form H bonding can evaporate ...
  13. water vapor

    When the weather is hot, and the inside of the house is cold, why do droplets of water form on the windows? Do they form on the outside or inside of the windows? Thanks. Water droplets form because of condensation. Here is a site that that talks about that. Actually, I have ...
  14. Chemistry

    Dr.Bobb222 please help balance the following oxidation-reduction reactions, which occur in acidic solution, using the half-reaction method. (Use the lowest possible coefficients. Include states-of-matter under the given conditions in your answer.) (a) NO3−(aq) + Pb(s) &#...
  15. ACC 105

    Employee Form W-2 Information Roach, Kelly Volpe, Ralph Myer, Randi Ford, Kenneth Carmen, Chrissy Zuber, Hal 1. Wages, tips, other compensation 2. Federal income tax withheld 3. Social security wages 4. Social security taxes withheld 5. Medicare wages and tips 6. Medicare tax ...
  16. algebra

    Write all of the following statement(s) that apply to the following polynomial: x2 – 9x + 3 It is a binomial. It can be evaluated at x = It has a coefficient of 9. It is quadratic.
  17. Algorithms

    Arrange the following functions in increasing order of growth rate (with g(n) following f(n) in your list if and only if f(n)=O(g(n))). a)2^2^n b)2^n^2 c)n^2 * log(n) d)n e)n^2^n
  18. Calculus

    Which of the following would be the best first step when solving the following system using the substitution method? x - y = -4 ; x + 2y = 5 a. x = -4 - y b. x = -4 + y c. 2y = 5 - x d. 2y = 5 + x
  19. chemistry

    Determine whether ∆H is equal to, greater than, or less than ∆U for the following reactions. Keep in mind that “greater than” means more positive or less negative, and “less than” means less positive or more negative. Assume that the only significant change...
  20. physics

    The current-density magnitude in a certain cicular wire is J= (2.75*10^10A/m^4)r^, where r is the radial distance out to the wire 's radius of 3.00 mm. The potential applied to the wire is 60.0 V. how much energy is converted to thermal enery in 2 hours?
  21. MATH Albera

    Sales at a certain department store follow the model where y is the total sales in thousands of dollars and x is the number of years after 2001. What was the first year that sales fell below $50,000?
  22. English

    1.Mom always (____) her glasses down somewhere and then can't find them. 2.No one could believe that Carol had been (___) near the dog the entire time. Use correct form of sit or set 1.sets 2.sitting 1.My grades have (----) a little each semester. 2.My father jokes that he (...
  23. chemistry

    A STUDENT STUDYING THE FE+3- HSCN equilibrium put into a test tube 10.00ml of 2.00 x 10-3 M Fe(NO3)3 with 10.0 mL of 2.00 x 10-3 M HSCN.THE H+ in the resulting solution was manteined at 0.500.By spectrophotometric analysis of the equilibrium solution, the equilibrium ...
  24. Fitness And Nurition

    Greetings! I did my homework, but I don't know if my answers are right or not. I wanted to know if you can help. My answers will be with a * beside it. 1. Which one of the following choices is a mental symptom of distress? A. Memory loss B. High self-esteem C. Hallucinations *...
  25. English

    I forgot to include these very few lines. Thank you very much for helping me. 1) Anyone who doesn't know the difference between opposites must be associated with evil. 2) We undestand that the witches have the power of knowing something about the future for they are able to ...
  26. Algebra

    - ok... we keep getting this one wrong: Solve the following equation for x. Write your answer as a fraction in simplest form. -6(x-5)=-2x-8-6(3x-5) What is it you don't understand about this? Clear the parentheses, combine terms, solve for x. Ive been doing that but i keep ...
  27. intro to lan technologies

    • Explain how you would create the users for the sales organization unit and how you can set up work groups in this particular situation. Keep in mind that you may have to name certain applications and allowable tasks for each individual or job role.
  28. psychology

    the legal requirement that professionals notify appropriate authorities about cases in which children and certain other groups of vulnerable individuals are being abused is referred to as a) parens patriae. b)informed consent. c)duty to warm. d)mandated reporting.
  29. Math 120

    The results of a certain medical test are normally distributed with a mean of 128 and a standard deviation of 19. ​(A score above 140 is considered​ unhealthy.) Use the given table to find the percentage of people with readings below 137.
  30. Chemistry

    how many electrons take part in redox reaction: Cl2 -> ClO3^-
  31. ap chemistry

    What product is formed by this reaction: H2 + (CH)2 Answered the original post below.
  32. Science

    Chemistry: What is the general formula for a chemical reaction? reactants >> products
  33. chemistry

    what is the net ionic reaction for coppper(II)chloride and sodium hydroxide?
  34. chemistry

    At 1100 K, Kp = 0.25 for the reaction 2SO2(g) + O2(g) equilibrium with 2SO3(g) What is the value of Kc at this temperature?
  35. for Drbob222

    how do I calculate pressure exerted by H2 in a Mg and HCl reaction? (weighing by redox)
  36. chem

    2 HNO3(aq) + Na2CO3(s) 2 NaNO3(aq) + H2O(l) + CO2(g) (a) Calculate H° for this reaction. kJ
  37. chemistry

    Why doesn't the hydrogen produced in the Lithium/water reaction catch fire?
  38. chemistry

    If the reaction is zero order, how long would it take for I2 disappear?
  39. chemistry

    What is the mass of hydrogen produced from the reaction of 2.31 grams of HCl with magnesium?
  40. Gen Chem

    Can the rate of a nuclear reaction be changed by an increase of temperature?
  41. chemistry

    What functional group(s) must be present in a monomer of a condensation reaction?
  42. chemistry

    What functional group(s) must be present in a monomer of a condensation reaction?
  43. chem

    What functional group(s) must be present in a monomer of a condensation reaction.
  44. Biology

    Describe how you can achieve negative free energy in a chemical reaction.
  45. History

    why were the British so surprised by the American Patriots reaction to the Stamp Act?
  46. chemistry

    how do i balance Cu+O2 arrow(i don't know how to make one)CuO. And what is the reaction type.
  47. organic chemistry

    what is the first and second step in a alkene halogenation reaction
  48. science

    what is the difference between a chemical reaction ans physical separation.
  49. science, biology

    what evidence shows that the burning of methane is a chemical reaction?
  50. science

    hi can someone please help me What is the chemical reaction mechanism of ozone depletion thank you
  51. chemistry

    What does it mean when the sulfuric acid is written ABOVE the arrow in a reaction?
  52. Chemistry

    Does Sodium and potassium react with steam? Or is the reaction too violent to speak of?
  53. chemistry

    I wanted to know that in a chemical reaction are the products part of the system or surrounding?
  54. Psychology

    How could having a Type A personality affect a person’s reaction to stress?
  55. chemistry

    write the reaction for the neutralization of nitric acid with calcium hydroxide.
  56. Chemistry

    What type of bond is formed in the reaction 4Fe(s)+3O2(g)? Rust?
  57. Chemistry

    Here is a chemical reaction Fe + O2--> Fe2+O3 what was Antonie Lavoiser rusting?
  58. Chem

    How does the collision model explain the ffect of concentration on the reaction rate?
  59. Chem

    How does the collision model explain the ffect of concentration on the reaction rate?
  60. chemistry

    What is a complete ionic equation for the reaction between Pb(NO3)2 and NaI?
  61. chemistry

    what is the product of reaction K3(Al(C2O4)3).3H2O with KMnO4 in the present of H2SO4?
  62. college chemistry

    How do you calculate delta[S2O8 2-] in iodine clock reaction?
  63. chemistry

    According to this chemical reaction, which is the number of grams of Fe produce from 14 moles of H2?
  64. chem

    what is the major product of this reaction CH2=CH-CH2CH3+H2O H2SO4
  65. science

    what will happen if you increase the surface area of a solid in a chemical reaction?
  66. College Chemistry

    Quick Question - For a spontaneous reaction, ΔS°>0 and K >1. Is this always?
  67. 7th grade chemistry

    how is calcium sulfate is prepared?what is the chemical reaction of this.
  68. Chemistry

    What is the product of a grignard reaction of bromotoluene and co2 as starting materials?
  69. Chemistry

    Write a balanced chemical reaction showing how the 4.99 g Sn dissolves in HNO3.
  70. Chem Help

    What is the heat of reaction when 4 moles of carbon monnozide are buened in oxygen?
  71. chem 11

    write the balanced equation for the electrolysis of water. What type of reaction is this?
  72. chemistry

    Any reaction that absorbs 150 kcal of energy can be classified as ________.
  73. chemistry

    write a balanced equation for the reaction of aluminum with platinum and chloride.
  74. chemistry

    write the balanced net ionic equation for this reaction Ba(OH)2+HCL-->
  75. chemistry

    express liquid pentanol and gaseous oxygen as a chemical reaction
  76. chemistry prt 2

    What is the net ionic equation of the reaction of MgCl2 with NaOH
  77. chemistry prt 3

    What is the net ionic equation of the reaction of MgSO4 with NaOH
  78. chemistry

    What ions separate once added to water and how did the reaction occur?
  79. chemistry

    What ions separate once added to water and how did the reaction occur?
  80. chemistry

    What ions separate once added to water and how did the reaction occur?
  81. ap chem

    What volume of 5M HF will 4g Ca react completely according to the reaction Ca+2HF-->O+CaF2+H2
  82. Chemistry

    What is undergoing oxidation in the redox reaction represented by Fe Fe3+ Cl2 Cl- Pt
  83. chemistry

    DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)
  84. Chemistry

    Calculate the change in heat for the reaction SO2 + 1/2O2 --> SO3
  85. Chemistry

    Calculate the standard enthalpy change of the reaction ClO(g)+O3->ClO2(g)+O2(g)
  86. Chemistry

    Why does sulfric acid make the electrolysis reaction of H2 and O2 go more rapidly?
  87. Chemistry

    What kind of reaction is it when the reactants produce carbon dioxide and water
  88. Help

    Fibrin is produced when the blood components called what start chain reaction
  89. biology

    how is it possible for an enzyne to lower the required energy of activation for a reaction.
  90. science

    when a liquid wax is turned into a solid is it a chemical reaction?
  91. chemistry

    what is the numerical value of the equilibrium constant Kgoal for the reaction CO2(g) C(s) +O2(g)
  92. SCIENCE

    What are the products of a chemical reaction involving NaCl, HNO3, and AgNO3?
  93. chemistry

    If a car produces 88g of CO2, how many grams of O2 are used up in the reaction?
  94. chemistry

    write balanced equation of the reaction of bromine and sodium thiosulfate
  95. chemistry

    what is the net ionic equation, including phases, for the reaction of AgNO3 with Ba(OH)2
  96. physical science

    what reaction do you get when adding 3 tespoons of Na2S2O3 to 50 ml of boiling water
  97. chemistry

    is energy considered a chemical reaction that is important to a healthcare professional
  98. Chemistry

    For the reaction HNO3+HCl=NO2Cl+H20 What is the equilibrium constant at 25 C and 75 C
  99. chemistry

    what is an ionic compound that forms an acid-base neutralization reaction?
  100. Chemistry

    What is the chemical reaction between Phosphoric Acid and Disodium Phosphate?
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