chemistry! URGENT

61,546 results, page 27

  1. Chemistry

    I'm supposed to do this for an organic chemistry prelab. I've read my books and tried Googling everything possible, but I still don't know how to set this up. Please help! The solubility of a certain compound in ice-cold water is 0.18g in 100 mL. Its solubility in hot water is...
  2. MATH URGENT!!!

    A researcher is interested in the effects of monetary incentives on task performance. She recruits 60 undergraduate business students and offers to pay them each $5 for a 1 hour research session. She then randomly assigns these students to either a control group or an ...
  3. Urgent Science!!!

    1. Which of the following is NOT a fossil? (1 point) outline of a fern found in a rock petrified wood in the desert baby mammoth found in a glacier old stone tools found in a cave 2. _____ is based on the idea that younger rock layers are deposited on top of older rock layers ...
  4. accounting URGENT HELP DUE IN 1HR

    (a) Fill in the missing amounts. (If answer is zero, please enter 0. Do not leave any fields blank.) Account Titles Trial Balance Adjusted Trial Balance Dr. Cr. Dr. Cr. Accounts Receivable 34,000 Prepaid Insurance 26,000 20,000 Supplies 7,000 Accumulated Depreciation 12,000 ...
  5. Chemistry

    From the Standard Potential Table in your general chemistry textbook: Half-reactions are written as _________ reactions with charge and mass balanced. Among the ions, Cd2+Pb2+ & Ca2+ ,__________ has the greatest ability to reduce to its neutral metal. (Use ^ for superscripting...
  6. College: Chemistry

    Hi there, I need help on my homework for chemistry and I do not understand the step on how to work this problem out. Please help me with this problem: On a Sunday morning while having your breakfast you determine that you need about 2.95X10^(5)J to heat water for your tea in ...
  7. MATHS

    in a class of 60 students,the number of students who pass biology is 6 more than the number who pass chemistry.every student passed at least one of the two subject.how many pass in only biology.how many pass in only chemistry.
  8. college: Chemistry

    Hi there I need help with my chemistry homework There are two parts to the first question and i did the first part and i got E= -6.54E-18J. Part A) Calculate the energy (in J) of the photon associated with the transition of electron in He from n=2 to n=1. Part B) As the Value ...
  9. Chemistry

    My chemistry teacher said that the pCO2 value increases during hypoventilation. Why is that? If hypoventilation causes shortness of breath, would that not increase the CO2 concentration, therefore decreasing pCO2? Because if you think about pH, a larger H concentration causes ...
  10. Chemistry

    My chemistry teacher said that the pCO2 value increases during hypoventilation. Why is that? If hypoventilation causes shortness of breath, would that not increase the CO2 concentration, therefore decreasing pCO2? Because if you think about pH, a larger H concentration causes ...
  11. Chemistry

    Hi Dr. Bob, I am quite stumped on how to figure out when chemical equations have a REACTION or NO REACTION. I have read the material in my textbook and even took out a chemistry books for the "Utterly Confused" to try to figure this out. Example: Zn(s) + H3PO4(aq)--> Zn3(...
  12. chemistry

    With respect to Boyle's law (lab experiment with textbooks on an apparatus), if in the classroom the air pressure in the classroom is equal to 2.4 textbooks, how does one find the total pressure of a book with the volume of 26? Am I on the right track by dividing the volume of...
  13. 12 Biology! URGENT!

    Is this right: Place numbers beside the statement below to indicate the order of events occurring in the light reactions: 3 low energy electrons at PSI are re-energized by a photon of light 5 electrons energized at PSII jump to a higher lever, as they fall through various ...
  14. 12 Biology! URGENT!

    Is this right: Place numbers beside the statement below to indicate the order of events occurring in the light reactions: 3 low energy electrons at PSI are re-energized by a photon of light 5 electrons energized at PSII jump to a higher lever, as they fall through various ...
  15. chemistry

    i am trying to find the average rate of h2? from mastering chemistry home work. part a answer was 0.027m/s and part b answer was 0.054m/s. i cant find part c home answer
  16. ap chemistry

    home / study / questions and answers / science / chemistry / balance the following example of a heterogeneous ... Your question has been answered! Rate it below. Let us know if you got a helpful answer. . Question Balance the following example of a heterogeneous equilibrium ...
  17. French-Urgent

    With a partner, play the roles of an American student who is shopping at a ski resort in the french Alps and the salesclerk at the resort's boutique. The customer's brother wants a nice French ski jacket and has given the customer enough money to buy it. During the course of ...
  18. math

    In a class of 80 students,53 study Art,60 study biology,36 study art and biology,34 study art and chemistry,6 study biology and 18 study biology but not chemistry.Determine the number of students who study =Art only =Chemistry only
  19. Chemistry

    i need some help with my science homework it`s the chemistry GCSE core:C2 TASK SHEET i need to design a leaflet explaining how to extract gold aluminium and iron. the words i need to include are anode,bauxite,carbon,carbon dioxide ,cathode,crust,cryolite,displacement,reaction,...
  20. physics

    A sophomore chemistry student holds a 500mL Erlenmeyer flask full of concentrated nitric acid high above his head at a height of 1.75 meters and declares, "I'm the King of Chemistry!" At that moment another student, startled by the sudden ignition of her Bunsen burner, jumps ...
  21. French (URGENT #2)

    Can someone please help check my work? There were no instructions, it is as I have written it. Am I supposed to choose only one? or more? 1. On peut pratiquer les sports décrits dans cette annonce... info: SPORTS. Cercle. Nautique. Martinique. Ski nautique - Planche à voille...
  22. chemistry

    To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it comes to olive oil, exactly what does this term signify? I am supposed to explain the chemistry behind Extra Virgin Olive oils, what makes the ...
  23. Chemistry

    To culinary experts and to the average person the term “Extra Virgin” has a ring of exclusiveness and quality to it. When it comes to olive oil, exactly what does this term signify? I am supposed to explain the chemistry behind Extra Virgin Olive oils, what makes the ...
  24. chemistry

    1. Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this test. You also may use the formulas on pages 238 243. A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K. Assuming constant pressure...
  25. math

    A textbook store sold a combined total of 315 physics and chemistry textbooks in a week. The number of physics textbooks sold was two times the number of chemistry textbooks sold. How many textbooks of each type were sold?
  26. math

    A textbook store sold a combined total of 462 biology and chemistry textbooks in a week. The number of biology textbooks sold was two times the number of chemistry textbooks sold. How many textbooks of each type were sold?
  27. Chemistry

    i need help. Calculate the pH of a 0.24 M CoCl3 solution. The Ka value for Co(H2O)63+ is 1.0 10-5. how do u do these with like the Cl there? Responses Chemistry - DrBob222, Monday, February 16, 2009 at 12:35am Just ignore the Cl^-. Co(H2O)6Cl3 ==> Co(H2O)6^+3 + 3Cl^- Then ...
  28. science... Help me urgent!!

    Please help me check if I did my homework right base on a picture of picking strawberry farm. 1. Activity Investigation Picture Scientific Method: I. Perceiving the Problem Are these people a worker in a farm? II. Research a. Wearing different style of clothes b. Different ...
  29. Chemistry

    What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a 6.00 M KCl solution to a volume of 0.500 L? A. 1.67 B. 0.600 C. 0.0167 D. 3.0 E. none of these My initial thought was to take the 6.00 M KCl/0.500 L, for an answer of 12. This baffles me that ...
  30. Chemistry

    "Hi there! So I have a chemistry project due in a few hours. I need to find the molar mass of a specific antacid tablet, but all I know is that the tablet is made up of 550mg CaCO3 and 110mg Mg(OH)2 I also know that the tablet has a mass 1.35g. How do I find the molar mass of ...
  31. Chemistry(Please help)

    delta Go = -431.16kJ/mol - (298k X 0.12529 kJ/K*mol) I am having trouble converting the units for delta H and delta s to match. I multiplied delta H by 1000 to get kJ but this didn't give me the correct answer. Chemistry(Please help) - Dev, Wednesday, April 25, 2012 at 6:56pm ...
  32. Overdue Science Lesson, Very Urgent.

    1: How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. 2, Which features form the...
  33. chemistry

    Where can I find the answers to these questions in my text, "fundamentals of analytical chemistry" by skoog, west, holler and crouch. 1. Why is acetylsalicylic acid analyzed using back titration? 2. Discuss the importance of simmering the tablet in the NaOH solution for 20 ...
  34. Coordination Chemistry

    A particular metal ion octahedral complex has the same number of unpaired electrons (non-zero) whether the complex uses weak or strong field ligands. List several fourth period transition metal ions that could have this behavior. Also, if someone could point me in the ...
  35. Chemistry

    Posted by Hannah on Saturday, April 18, 2009 at 3:05pm. Find the pH of a 0.010M solution of NH4ClO4 and the pH of a 0.010M solution of NH4C2H3O2. Responses * chemistry - Anonymous, Saturday, April 18, 2009 at 3:36pm after finding the ph of the corresponding ions in these two ...
  36. social studies 20-1 (URGENT)

    examine each source below and write in paragraph form, a response in which you: -interpret each source to identify and explain the perspective(s) related to Nationalism. -identify and discuss one or more ideological concepts that are refleted in the sources. -Use your knowlage...
  37. Chemistry!! - bobpursley please

    Calculate the maximum wavelength of light capable of removing an electron for a hydrogen atom from the energy state characterized by the following when n=4 =__________nm Responses Chemistry!! - bobpursley, Wednesday, October 22, 2008 at 4:05am So the two energy states are n=4 ...
  38. Math

    of 250 candidates writing a exam, 147 passed in math,150 pass in chemistry and 85 pass subjects B)calculate the number of students who pass i)pass math only ii)pass chemistry only iii)passed neither iv)pass only one subject
  39. Chemistry

    Organic chemistry: an attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of 11.0 degrees. If it is known that the specific rotation of the R enantiomer is -33.6 degrees, determine ...
  40. ap chemistry

    ap chemistry - an, Tuesday, January 6, 2015 at 12:59am HELP ME WITH THIS ONE WHEN DONE WITH THE OTHER THX calculate the concentration of CO2 in a soft drink after the bottle is opened and equilibrates at 25C under a CO2 partial pressure of 0.0003 atm. c=KP henry's law k=? k ...
  41. Chemistry

    Hello! I was working on my Chemistry HW about metric conversion. Can you please check to see if my answers are correct? I was having a hard time converting, and I think I finally figured it out. 1 microliter= 0.000001 liters 1 mL= 1,000 microliters 100mL= 0.1 liters 45 ...
  42. chemistry

    In my chemistry lab we decomposed lead (iv) oxide by heating it and then placing a wooden splint(test the evloved gas) into the mouth of the test tube. The color changed into red lead ( Pb304).Then we reheated the sample again and it turned to PbO. I do not understand why the ...
  43. Chemistry

    When 50 grams of hydrocarbon X are burned with oxygen the products are carbon dioxide and water. If 65 grams of water and 100 grams of carbon dioxide are produced, how many grams of oxygen were needed for the reaction? This was a question on my chemistry homework but I'm ...
  44. Chemistry

    Hello, I have the next problem about solubility and dissociation of ions: Calculate the solubility of FeS in pure water. Ksp = 8 × 10−19. (Hint: The second stage of hydrolysis, producing H2S, cannot be neglected.) This excersice was taken from Schaum's college chemistry ...
  45. Chemistry - Science (Dr. Bob222)

    Posted by Ana on Saturday, May 3, 2014 at 11:23am. A zinc-copper battery is constructed as follows (standard reduction potentials given below): Zn | Zn2+ (0.10 M) || Cu2+ (2.50 M) | Cu Zn2+ + 2 e- → Zn(s) Eº = -0.76 V Cu2+ + 2 e- → Cu(s) Eº = 0.34 V The mass of ...
  46. math

    •You and three (3) of your friends were in the same advance placement high school chemistry class in high school. All four (4) of you decided to take the same chemistry class together at the local university along with 21 other students. On the first day of class, the ...
  47. chemistry

    I have a lot of trouble doing this chemistry exercise It says: The altitude of the lake affects the solubility of oxygen in lakes high in the alps. if the solubility of O2 from the air is 7.89 mg/L M at sea level and 25C, what is the solubility of O2 in moles/L at an elevation...
  48. English

    Could you please check these statements, please? It's really urgent. 1)How are the flowers introduced in the first stanza of William Wordsworth’s poem “Daffodils”? What view of nature is presented in the poem? 2) Briefly outline the relationship between man and nature in...
  49. Science

    What were Mendeleev's reversals?How did Henry Moseley explain them? Mendeleev thought the periodic table was in order of atomic mass. Mosley determined that atomic number was the correct order. http://www.chemistry.co.nz/henry_moseley.htm
  50. chemistry hellllllllllllllllllp

    Oxidising and reduction- Chemistry? Oxidation and reduction can be described as the loss and/or gain of electrons from an ion or atom (species) in a chemical reaction. For the following aqueous reaction, select the species that is oxidized and similarly the one that is reduced...
  51. Chemistry

    I need to calculate the molecular mass of ehtylene glycol based on the freezing point depression. The teacher said that for glycol i=1 and to use the equation m=delta T / Kf X i Kf = -1.86C/m so I did -2.5C / -1.86 X 1 = 1.344 I know that 1.344 can't be the weight for glycol ...
  52. Physical Chemistry Help!

    I am posting a link to the jpeg file of the physical chemistry homework i need help with, because everytime I try typing it out, I just get wierd symbols. If somebody could please help, that would be greatly appreciated! Thanks~ =) img.photobucket. com/ albums/v219/AzNxB3Ba/...
  53. PHYSICS - urgent

    assuming there's no friction of, if two balls (one heavier than the other) are held up the same distance from the ground; the heavier ball will have more G.P.E than the lighter one, n when both are dropped, all the G.P.E can only change to K.E, as there's no friction; wot i'm ...
  54. Physics - urgent

    I already asked this and was given an answer, but I don't fully understand it and so would like a further explanation. What I asked was... An electron is accelerated through a uniform electric field of magnitude 2.5x10^2 N/C with an initial speed of 1.2x10^6 m/s parallel to ...
  55. Finance Class Help (very very urgent) need asap

    K this is what I have so far. I am wondering if i did the CAPM right and if that is all i need for that part and then I need to know how to do the Constant Growth Model. When you do yours, assume the risk-free return as 6% Assume the expected market return 12% The beta, ...
  56. physics(URGENT)

    An airliner makes an emergency landing with its nose wheel locked in a position perpendicular to its normal rolling position. The forces acting to stop the airliner arise from friction due to the wheels and from the breaking effort of the engines in reverse thrust mode. The ...
  57. english

    hi can someone pleases help me analyze this poem. I need a lot of help In The Gallery Here neither nymph nor naiad ever bathed nor Saint refreshed herself in pristine water, here, in The Gallery, between Tie Rack, Camera Shop, B. Dalton, Radio Shack, Dad's Pizzas, Message ...
  58. chemistry

    What mass in grams of potassium hydroxide is cntained in 500 mL of solution that has a pH of 11.5? For Further Reading chemistry - DrBob222, Sunday, April 6, 2008 at 12:09am pH = 11.5 pOH = 14 - 11.5 = 2.5 pOH = -log(OH^-) ] 2.5 (OH^-) = ?? KOH ==> K^+ + OH^- This is a ...
  59. Chemistry

    I wanted to now what is the molecular geometry of SeBr4, because I believe is a trigonal bipyramid...but I am not sure...please help me.... I thought it was a see-saw shape. See http://www.stolaf.edu/depts/chemistry/mo/struc/explore.htm You can see SeF4, the shape of SeBr4 is ...
  60. French (URGENT)

    You are vacationing in Paris. Describe the Hotel and Restaurant. Can someone please check my work? The atmosphere at L’Atelier de Joël Robuchon is so very different from any other French dining experience. You sit around the kitchen on high stools. Can be quite a show. You ...
  61. chemistry ........................chemistry

    Sodium Na+ Intense yellow Barium Ba++ Green Calcium Ca++ Brick red Copper Cu+ or Cu++ Blue-green Strontium Sr++ ? Lithium Li+ ? Sodium and potassium mixture Na+&K :yellow light Observations using the cobalt glass filter Sodium & potassium mixture Na+&K+:reddish color Potassium...
  62. Chemistry

    How is the chemistry of water important to chemical reactions that support life? What does cohesion and polarity have to do with the chemical reactions and chemicals necessary for life? Does the cohesion have to do with it sticking together into molecules, but also because of ...
  63. Spanish (URGENT)

    Original..... Invierno tardio No es increíble cuanto ven mis ojos: nieva sobre el almendro florido, nieva sobre la nieve. Este invierno mi ánimo es como una primavera temprana, es como un almendro floroido bajo la nieve. Hay demasiado frío esta tarde en el mundo. Pero abro ...
  64. Spanish #2 (URGENT)

    Can someone please check my work? Write a complete sentence using the elements below and replacing the words in parentheses with a direct object pronoun. modelo: Mabel/hablar (yo) Mabel me habla. 1. Jorge y Ernesto/quieren cerrar (su tienda) temprano Jorge y Ernesto quieren la...
  65. Chemistry

    Explain in terms of forces between structural units why H2O2 has a higher melting point than C3H8. Also, which of the following has a lower melting point? NH3 or AsH3 C3H7OH or C2H5OCH3 I know that this has to do with hydrogen bonding. Can you possibly briefly explain ...
  66. chemistry

    What pressure would have to be applied to steam at 325°C to condense the steam to liquid water (ÄH vap = 40.7 kJ/mol)? Responses Dr bob please! Chemistry - GK, Friday, November 28, 2008 at 11:47pm Use the Clausius-Clapeyron Equation to calculate the vapor pressure at 325°C...
  67. CHEMISTRY! HELP

    1. Given the following set of quantum numbers: 3py -1/2. A chemistry student claims that this represents a peanut-shaped electron. Is she correct? Answer (Am I correct? If not, how?) : She is correct because 3py is a peanut shape with -1/2 being the spin. 2. A chemistry ...
  68. English

    Can you please check the following sentences, please. It's really urgent. 1) Following what Joyce had already done in England and Proust in France, and what, in some way, Sterne had attempted as early as two centuries before, Virginia Woolf therefore abandoned the traditional ...
  69. chemistry

    Hi you guys please help me with my chemistry homework, i need to find all these items and take them to my class in a ziploc bag *a hydrocarbon with a molecular mass greater than 100g/mol *2 porpanol *an aromatic compound(not the common usage of "aromatic" the chemistry use. *a...
  70. Chemistry

    Can you please someone check my answer for me? I don't know how to start thses answer. Chemistry is not my things. Please give me answers. :( a)Determine the number of grams in 0.750 moles of the compound Iron(II)phosphate: Fe3(PO4)2. Answer: ? b)How many atoms of iron are in ...
  71. math

    Emily surmises that the probability that she will pass math or chemistry is .95, the probability of her passing math is .7, and the probability of passing both is .55. Find her estimate of the probability of passing chemistry?
  72. Advice...about chemistry degree Dr.Bob

    Based on the question topic posted by Britney below titled:In your opinion (your answer to this reminded me of something) (I posted the same thing there but I thought it was improper to piggyback on that post so I posted this under a new topic) I don't know where to start but ...
  73. Chemistry

    I need to determine the "percentage composition unknown" whatever that is. My current data: a) mass of test tube and foil cover: 7.5323 g b)temp of water bath: 375.65 K c) mass of test tube and foil and gas as sample: 7.5423 g d) barometric pressure: 1.0190 kpa e) mass of test...
  74. Chemistry-pls help

    I refer to the following question. Is my explanation correct, that step two C6H14(g)--> 6CO2(g) + 7H2O(g) can be considered combustion reaction? Thank you! Posted by jan on Tuesday, March 31, 2009 at 10:28pm. C6H14(l)->C6H14(g) ->6CO2(g) + 7H2O(g) ->6CO2(g) + 7H2O(...
  75. Chemistry

    can anyone help me on my chemistry problem. i need a merck index to solve this. i have a PH of 10.7 and the nearest solution that is near to it is 10.32. The solution that is 10.32 is NaHCO3. i subtract both of them to get the ratio of log (HA)/(A-). i took that value to the ...
  76. mathematics

    in a class of 60 students, the number of students who passed biology is 6 more the number of student who passed chemistry. Every student passed at least 1 subject and 8 passed both subject. How many passed chemistry
  77. Chemistry

    Posted by Angeline on Monday, April 20, 2009 at 5:35pm. A few questions...how many grams are in 48.7x10^24? I don't know how to convert atoms to grams. I can do moles to grams or moles to atoms, but not atoms to grams. My other problem is how do you convert moles to moles as ...
  78. Chemistry(Please respond, thank you)

    What is the [H3O+] for a neutral solution at 50 degrees celsius? I know that kw=[H3O+][OH-] but I am not sure what to do to get the H3O. The value I have for kw=5.76e-14 and I have the pH 6.62 but I do not know what the OH would be. Chemistry(Please help, thank you) - DrBob222...
  79. English

    Ms Sue or Damon, as Writeacher is on vacation, I really hope you can check my today's post. I still have a few other sentences.It is extremely urgent!!! 1) To be honest, I had never heard of Derek Landy, but I found out, to my surprise, that he is a well-known Irish ...
  80. Chemistry

    Acetone is one of the most important solvents in organic chemistry, used to dissolve everything from fats and waxes to airplane glue and nail polish. At high temperature, it decomposes in a first order process to methane and ketene (CH2=C=O).At 600C, the rate constant is 8....
  81. Chemistry

    4.00 mol of solid A was placed in a sealed 1.00-L container and allowed to decompose into gaseous B and C. The concentration of B steadily increased until it reached 1.20 M, where it remained constant. A(s) <-------> B(g)+C(g) Then, the container volume was doubled and ...
  82. Chemistry

    Ytterbium, atomic number 70, is the first element in the Periodic table to have the first four shells full. a) State the number of electrons in the fourth shell/ level of ytterbium (1) b)How many orbitals are there in the third shell of ytterbium? (1) Please help I'm very ...
  83. Chemistry

    I know mathematically I can write chemical reactions this way but in chemistry can I if now why? 2K + 2(H20) yields 2KOH + H2 2(K + H20) yields 2KOH + H2 can I also do this if not why? 2(CO) + O2 yields 2(CO2) O(2C + O) Yields 2(CO2) I don't see why I cant do any of these ...
  84. physics

    The diagram below shows two identical balls A and B on a horizontal surface. Ball B is at rest and ball A is moving with speed V along a line joining the centres of the balls. The mass of each ball is M. (DIAGRAM BEFORE COLLISION: there are 2 balls, first one is called ball A ...
  85. Organic Chemistry

    I realize this is a general chemistry stoichiometry question, however I can not fully grasp it. I am supposed to calculate the theoretical amount (volume) of 3M sodium hydroxide (NaOH) needed to convert 1.5g of benzoic acid to its salt. I got 0.012 moles of bezoic acid present...
  86. Re: chemistry

    The average pH of open ocean water is 8.1. What is the maximum value of [Fe3+] in pH 8.1 seawater if the Ksp of Fe(OH)3 is 1.1*10^-36? chemistry - DrBob222, Friday, December 7, 2012 at 10:14pm Fe(OH)3 ==> Fe^3+ + 3OH^- pH = 8.1 pH + pOH = pKw = 14 Therefore, pOH = 14-8.1...
  87. Chemistry

    Which aqueous solution below is expected to have the lowest freezing point? Assume 100% dissociation for ionic species. 1)0.25m MgBr2 2)0.30m Na2SO4 3) 0.50m KCl 4) 1.0m sucrose 5) 0.40m Cr(NO3)3 I think that the answer is 0.30NaSO4 but I am not positive. Is this correct? ...
  88. University Chemistry (first year)

    I'm working on a first year chemistry lab where we synthesized alum from alunimini foil and I'm doing the report and one of the questions is as follows: Based on your findings, what volume of water can be cleared of suspended solids by one beverage can (give a range in L)? (...
  89. chemistry

    I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results are a very large ...
  90. chemistry

    I have been having a problem with solving a chemistry problem. The problem requires finding the density in copper at 1305K (the temperature changes when you reset the problem). I think I am using the proper formula, (N_v/N_s=Ae^-changeH_v/kT). My results are a very large ...
  91. Chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How many electrons does ...
  92. Chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How many electrons does ...
  93. chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How many electrons does ...
  94. chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How many electrons does ...
  95. Chemistry

    Need help with AP chemistry, specifically Acids and Bases The acid ionization constant, Ka, for propanoic acid, C2H5COOH, is 1.3  10 -5 . (a) Write the expression for the acid-dissociation constant, Ka for propanoic acid. (b) Calculate the hydrogen ion concentration, [...
  96. chemistry ................chemistry

    what is the color a mixture of sodium and potassium compounds?? What is the color a mixture of sodium and potassium compounds (use the cobalt glass)??
  97. chemistry

    I want to make sure I am correct in classifying whether the following properties of hydrogen are chemical or physical. thanks 1. hydrogen will burN in in oxygen to form water. CHEMICAL 2. hydrogen does not support combustion. CHEMICAL 3.hydrogen is usually found combined with ...
  98. Chemistry

    For chemistry, I have to make a line graph. My teacher specifically instructed us to make one with smooth, fluid lines, not with choppy ones, so it would form a curve. I am suppposed to find the slope of the line, but I don't know how to, because the line goes up and down and ...
  99. Chemistry

    Hey there! I have these two questions for my chemistry class, and I am a little confused on how I should go about solving them. If someone could give me the steps necessary to solve these problems I would be most appreciative. 1.) p-Toluenesulfinic acid undergoes a second-...
  100. Chemistry due soon

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How many electrons does ...
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  34. 33
  35. 34
  36. 35
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  38. 37
  39. 38
  40. 39
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  57. 56
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  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
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  86. 85
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  95. 94
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  101. 100