chemistry! URGENT

61,732 results, page 6

    1. Write the equilibrium expressions for the following reactions: a) 2 N2O(g) + O2(g)  4 NO(g) b) H2(g) + CO2(g)  H2O(g) + CO(g) c) 4 HCl(g) + O2(g)  2 Cl2(g) + 2 H2O(g) d) 3 H2(g) + N2(g)  2
  2. chemistry! URGENT

    A standard solution is prepared for the analysis of fluoxymesterone (C20H29FO3), an anabolic steroid. A stock solution is first prepared by dissolving 10.0 mg of fluoxymestrone in enough water to give a total volume of 500.0 ml. A 100.0 micro liter aliquot
  3. Chemistry-Urgent

    The partial pressure of CO2 inside a bottle of soft drink is 4.0 atm at 25°C. The solubility of CO2 is 0.12 mol/L. When the bottle is opened, the partial pressure drops to 3.0 ✕ 10-4 atm. What is the solubility of CO2 in the open drink? Express your
  4. Career Urgent

    Why do you need math, business, and computer-related courses to become a web designer/developer? please help and thank you
  5. physics URGENT

    3. Using conceptual meaning of g = Fg/m [N/kg], answer the following: a) What does the spring scale read on the surface of the Moon?
  6. Science- Very Urgent

    is it reasonable to expect that these models will change again in time? Explain. Like the bohr diagram and etc;
  7. Science

    If 5 equal pieces of 25 ohm (omega) is joined in parallel then what is the equivalent resistance of it. Is it 5 or 1.please urgent
  8. maths-urgent

    if xi 's are the mid points of the class interval of grouped data, fi 's are the corresponding frequinces and x^u is the mean, then (sum of) fi( xi-x^u) is?
  9. History, Urgent

    What was Andrew Jackson's role in the removal of American Indian tribes to the west?
  10. math please urgent! due in 20mins

    how to divide and simplify 12x^3-22x^2-44x-16/6x+4
  11. Measurement and evaluation

    Identify four natural and four locally made measuring instrument and show how they have been used. Please help me.. Urgent
  12. accounting.plz urgent

    If an item is purchased with terms of 2/EOM, n/60, there is a discount for paying within 60 days
  13. Math urgent

    If 3 consecutive integers add up to 27 , find the smallest of them. ( the answer is 8) but can you show me how pkeasee
  14. Algebra URGENT

    Write an equation that is in slop-intercept form of the line that passes through the points: (-1/2, -1) and (3, 5/2).
  15. Precalculus(URGENT)

    determoine whether the equation defines y as a function of x y= the square root of(-3x-6) please please show work
  16. maths urgent please

    the chord PQ joining the points P(2p, p^2) and Q(2q, q^2) on x^2 = 4ay always passes through the point A(2,0) when produced. show that (P+q) = pq thanks!
  17. Urgent math

    Two polynomials P and D are given. Use either synthetic or long division to divide P(x) by D(x), and express P in the form P(x) = D(x) · Q(x) + R(x). P(x) = 4x3 + 5x + 9, D(x) = 2x + 1 P(x) =(2x + 1)*()+
  18. geo..very urgent

    describe some factors that likely affect the climate of the ivvavik national park. Think of LOWERN.
  19. Algebra (urgent!)

    Find an equivalent inequality with absolute value #1: -5 < y < 5 #2: x < -4 or 4 < x I'm not sure at all how to solve this problem. Please walk me through the process. Thanks!
  20. Urgent math please help

    find a quadratic function that fits the set of data points. (1,4), (-1.6), (-2,16) what did i do wrong, i got -2x^2-x+7
  21. Math please help! Urgent

    Find the height of an equilateral triangle with sides of length 6 cm ' please show ur work
  22. help PLEASE! URGENT!

    ok, i need help w/ this problem. (4x^3 + x^2 + 3) + (x^3 + 2x^2 +1) can u please explain how to do this please? i'm very lost. Thanx! -Ally whoops, sorry i didn't mean to post twice! gather like terms.. (4x^3 + x^3)+(x^2 + 2x^2) +(3+1)....
  23. science- urgent

    How do humans grow crops on land that would naturally be either too dry or too wet? Explain. ?
  24. physics

    damon,reiny,steve,ms sue.plz get a solution 2 my question please itz urgent!!!
  25. Physics, Help!! URGENT!!!

    A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?
  26. Biology URGENT!!!!!!!!!

    How do eubacteria and cyanobacteria digest, excrete, respirate, and circulate? I have already tried wikipedia. try an encyclopidia
  27. Algebra 2 URGENT PLEASE HELP

    find an equation of the linear function f using the given information. please show all steps and work f(-1)=1, f(1)= -2
  28. geometry- Urgent!!!!

    In various constructions, you need to use the longer of two segments to construct the radius of a circle. Why do you think this is? What happens if you use the shorter segment?

    1 1200kg car is accelerating at 1.6m/s/s. If the coefficient of friction is .15, what is the force supplied by the engine? please help! urgent!
  30. Urgent geometry help

    On a isosceles triangle, how would you find the area and perimeter when given the bases: 12 and 32 and a 45 degree angle?
  31. math(Please help Urgent!!)

    In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD=x+9 and DM=6, find MB. Answer choices: 9 , 3, or 18.
  32. Geometry(VERY URGENT!!)

    In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD=x+9 and DM=6, find MB. Answer choices: 9,18, or 3.
  33. Sports---Urgent

    Does anyone know where I can find information on the genealogy of basketball? So, it came from blah, which was in turn derived from this or that. Please, any help would be great. Thanks.
  34. math(Please help Urgent!!!)

    In triangle ABC, D is the centroid and M is the midpoint of segment AC. If BD=10 and DM=2x+1, find MB. Answer choices: 2 , 9.5, or 15.
  35. Math-urgent-mid term exam review question

    Please help me simplify. I keep getting some weird answer. 3x^2(4x^3-2x^2+6x)-(x^5+5x^4-4x^3)+7x^5
  36. Lo its urgent please

    explain the importance of buildng a person confidence levels.give an example from the article of twillightchildren
  37. History, Urgent

    Who negotiated with the five tribes to convince them to side with the South durnig the Civil War?
  38. Urgent math

    Find the partial sum Sn of the arithmetic sequence that satisfies the given conditions. a2 = 5, a5 = 6.5, n = 15 S15 =
  39. urgent...maths

    Find the sum of all primes p, such that p divides u(p), where u(p) is the p-th Fibonacci number. this iss very urgentt...

    What shape has the same number of vertices as faces? Thanks!
  41. biology

    What is the outer edge of a cheek cell called? please urgent homework due tommorow
  42. Chemistry Urgent Help Please!

    You use 100 ml ethylchloride (density 0.92 g/ml) to extract 25 ml ethylene bromohydrin (density 2.41 g/ml) mixed with 100 ml. Is the aqueous layer the lower or the upper layer. How could you easily test this. You dissolve sodium chloride 40g. in the above
  43. Chemistry- URGENT please HELP

    NH4NO3(s)+H2O(l)→NH4NO3(aq) ΔH = +25.7 kJ. What is the final temperature in a squeezed cold pack that contains 49.0g of NH4NO3 dissolved in 125 mL of water? Assume a specific heat of 4.18J/(g⋅∘C) for the solution, an initial
  44. Chemistry Urgent

    Consider the following problem: Target: 2NOCl(g) ? N2(g)+ O2(g)+Cl2 (g) ?Hrxn= ? Steps: 1. 1/2 N2(g) + 1/2 O2(g)? NO(g) ?H= 90.3 kJ 2. NO(g) + 1/2 Cl2(g) ? NOCl(g) ?H= -38.6 kJ As you determine the ¥ÄHrxn value for the target equation above, what must be

    assume that 13.5g of AL react with HCl according to the following equation, at STP: Al(s) + HCl(aq) ---> AlCl3 + H2(g) Remember to balance the equation first. a. how many moles of Al react? b. how mang moles of H2 are produced? c. how mang liters of H2
  46. Urgent Chemistry Problem!!

    Calculate Delta G at 298 K for the following reactions. Ca(s) + CO2(g) + 1/2O2(g) -> CaCO3(s) 2KClO3(g) -> 2KCl(s) + 3O2(g) CH4(g) + 3Cl2(g) -> CHCl3(g) + 3HCl(g) Delta G^0f CHCl3 is - 70.4 kJ/mol The following reactions are important ones in
  47. Chemistry(Urgent, please respond, thanks!!)

    1) For the reaction system, 2 SO2(g) + O2(g) = 2 SO3(g), Kc has a value of 4.62 at 450.0 K (Kelvin). A system, at equilibrium has the following concentrations: (SO3) = 0.254 M; (O2) = 0.00855 M. What is the equilibrium concentration of SO2? Is set this up
  48. Chemistry URGENT

    I need help figuring out the calculations of my experiment. I'm sure I did something wrong cause I can not figure how to calculate the mass of sodium chloride. My measurements follow. 1. 250 mL beaker = 8.4 2. Mass of container = 0.4013 3. mass of
  49. chemistry

    URGENT: If 2.24g of salicylic acid is reacted with 61mL methanol, what is the maximum mass of product that could be formed? The density of methanol is 0.791g/mL. Do I just multiply 61ml by 0.791g/ml to get 48.251 g methanol then multiply this by the 2.24g
  50. History (urgent!)

    What would a noble family do on a daily basis? Please give me a specific site instead of a google search. Thank you so much!!!
  51. physics

    car doing 60 mph and skids for 52.3 meters what is the speed at end of skid co/friction is 0.693 urgent help please

    Find the volume formed by rotating the region enclosed by: x=2y and y^3=x with y greater than or equal to 0 about the y-axis
  53. english

    Which of the following usually gets a source note on the same page it appears? a. Quote b. Photo c. Paraphrased Passage d. Statistics please help me it urgent!! thank you!
  54. computers lies or truth VEY URGENT

    I saw a website that said the world will end in 2015. Is this true or not? I'm getting really really scared.

    HI! I searched on a lot of websites for this, but none of them actually was right for me. I need to do an egg drop withh only straws and glue/tape. Thanks!
  56. Calculus Please Need Urgent :/

    Find the most general antiderivative of f(x)=–8e^x–6secant^2(x) where -pi/2<x<pi/2 Note: Any arbitrary constants used must be an upper-case "C". F(x)=?
  57. Calculus (Urgent, please)

    Find the area of the region enclosed by the intersection of the circle x^2+y^2=4 and the parabola y=x^2. Show work
  58. Criminal justice

    Can someone please help. Who is responsible for the concept of crime prevention? Ive been stuck on this question for two days and i need help urgent. Thank you!
  59. Math Literacy, Business Studies, Economics& Tourism

    Im in grd12 and would like to know which available courses are there for these subjects and which career can I get into. #Urgent
  60. physics-heat transfer-urgent pls

    Calculate the energy absorbed when 8.5g of ice is melted at 0 Celsius. thank you
  61. history urgent

    the tarquins were responsible for creating which of the following? a.twelve tables b.republic c.pax romana
  62. Math

    what is the sum of a profit 0f $8000 and a loss of $13000? I'm realy struggling and need URGENT Help! plz respond

    Determine the ionization energy of a hydrogen atom (in kJ/mol) if the electron is in its ground state
  64. Chemist - Grade 9 - Urgent.

    Predict the physical properties and relative reactivity of Ba and Sr Cs and Br ( elements from periodic table )
  65. math urgent...:(

    Write the equation of a line perpendicular to 2y=3x+4 and passes through the point (7,-2). Please help me i have no idea in this. and please4 explain me how you did it. thanks.
  66. Geometry

    Perimeter of a right angled trangle is 40 cm. Hypotenus is 17cm. Find the area. Urgent help required. Thanks in advance
  67. 7/8 Math URGENT!!! PLZ HELP!! ANYONE????

    Could ANYONE please explain this formula to me and what the words mean... I=prt (Intrest= principle x rate x time)
  68. calculus HELP URGENT

    Find the equation of the line through the point (3,4) which cuts from the first quadrant a triangle of minimum area.
  69. science -- urgent

    can you pleaseee list all the things that Earth needs to provide us with life?? like energy, carbon, and so on.. THANKS A LOT!
  70. calculus

    Equilateral hexagon is revolving around one of its edges. Find the volume of the solid of revolution. no idea how to do this can someone please help!!! urgent!
  71. Social Studies (URGENT)

    10. Why did many Native people start adapting to Victorian society? Can someone please help me answer this question? Thank you very much.
  72. economics

    i have to submitt a project on "consumer awareness in india", so can i get some writings or a sample of it and a case regarding it. pleaseeeeeee its urgent!!!!
  73. Urgent math

    perform the indicated operation and if possible simplify. (2x+4y)/(2x^2+5xy+2y^2)*(4x^2-y^2)/(8x^2-8)÷(x^2+4xy+4y^2)/(x^2-6xy+9y^2) i don't understand this the answer is (2x-y)(x-3y)^2/4(x-1)(x+1)(x+2y)^2
  74. Geometry

    URGENT PLEASE HELP please help me understand how to draw a net, am i supposed to memorize these or is there a method for drawing nets for different shapes.
  75. reading->urgent

    hi.. i am doing a book report on "dead girls don't write letters" i am not sure who is the protagonist and the antagonist... i need help....
  76. research report...urgent

    we have viewed several sites...but we still don't know wat we can actually prove...we need to do a thesis statement [[1 or 2 sentences]]
  77. Pre-Algebra[URGENT]

    How would I solve this? Change 18.35 into a mixed number. Reduce your answer to lowest terms Thanks -MC
  78. english

    how to write in the conclusion at the end of the medicinal plants project?please give me an examples with details.It's very urgent.
  79. Algebra 2 Urgent! please Help!

    simplfy (10x^2-6x-x^3)+(9x+x^3+5x^2) please show all work and steps i have been working on this problem for 10 minutes and still cant figure out how to do it.
  80. English-Urgent please!

    What phrase structure rule creates coordinate structures? I am confused here. Is it prepositional phrases?
  81. Critical Thinking( Urgent)

    How would I refute this sentence please? Mike Smith should not be a presidential candidate.After all, he has never held office.
  82. Chemistry (urgent)

    Hydrolysis of a compound A, C7H6cl2 was carried out by refluxing with excess potassium hydroxide solution. the resulting solution was acidified with dilute HNO3 acid and excess silver nitrate was added to precipitate the chloride ions as silver chloride.
  83. Chemistry Urgent

    A calorimeter contains 32.0mL of water at 13.0∘C . When 2.30g of X (a substance with a molar mass of 82.0g/mol is added, it dissolves via the reaction X(s)+H2O(l)¨X(aq) and the temperature of the solution increases to 30.0∘C . Calculate the
  84. chemistry

    How do you make a venn diagram of the 6 branches of chemistry? (Inorganic chemistry, organic chemistry, biochemistry, nuclear chemistry, physical chemistry, and analytical chemistry) like where would they go in the 3 circles
  85. urgent spanish one question

    is this correct grammar - si, ponemos nuestra los vestidos en la habitacion del hotel?
  86. GEOL12 (urgent)

    i have one simple question i need answering. Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same? please help and thank you
  87. anatomy/urgent

    What is the functional advantage of the cat having so many muscles performing the same or very similar action? How does this relate to the human musculature?
  88. Math (URGENT)

    Use transformations and the zeros of the quadratic formula f(x)=(x+4)(x-2) to determine the zeroes of each of the following functions: a. y=3f(x) f. y=f(-1/2x) I have no idea how to start this. Any help appreciated. Thanks.
  89. biology i need help urgent

    what characteristic distinguishes arthropods from other invertebrates? a. the colem b.the endoskeleton c.jointed appendages d.bilateral symetry
  90. Theology 10 - HELP .... URGENT!!!

    what is your greatest talents? how has it helped the community any ideas... or topics i don't know what to write nor do i know how to start this essay
  91. Precalculus(URGENT)

    determine the domain of the function and express in interval notation square root of x-9 =y show work
  92. English (Urgent)

    How many Native Americans are here inn the world now? I did a google search, but I can't find my answer still, so can anyone please help me out wih this question? Thanks.
  93. Physics

    Simple Harmonic Motion With the equation x=Acos(2 pi f) t why and how does f affect x This is really urgent! Thanx for any help! frequency determines how rapidly x oscillates.
  94. geology (urgent)

    i have one simple question i need answering. Is the internal structure of a Composite, Cinder Cone, and Shield volcano are the same? please help and thank you
  95. Calculus - HELP URGENT PLEASE

    The region R is bounded by the x-axis, x=2 and y=x^2. Which of these expressions represents the volume of the solid formed by revolving R about the line x=2?
  96. Math urgent

    If two "fair" dice are tossed what is the probability that the sum of their faces will be a multiple of 3? Show or explain how you got your answer?
  97. Please help needed urgent

    N2 (g) + 3H2 (g) → 2NH3(g) ΔH = -92.2 kJ What mass of ammonia is theoretically produced if the above reaction released 168 kJ of heat?
  98. Organic Chem (URGENT)

    What is the monomeric unit of a chain of molecules joined by peptide bonds? Answer:?? If anyone can help with this question. Thank you very much.
  99. Math-URGENT,

    Given that y varies directly with x, write a direct variation equation that relates x and y. x=1/3 <---(fraction), y=2 **Provide an explanation as well, please.
  100. algebra II URGENT

    if peter received grades of 88,83,75,and 80 on four tests in English, what is the minimum grade he has to score on the fifth test to have an average of at least 85 for the course?