chemistry! URGENT

61,637 results, page 3

  1. Math URGENT

    3.8y+4/7x+2=0 Please help me. Thanks
  2. Math- Urgent, please help!

    3(4-2X)=-2X -1 1 2 3** Please help, thank you!
  3. algebra URGENT HELP

    A)p(x)= x(x+2)(x-4) b)p(x)=(x+2)^3(x-1)
  4. Maths urgent

    4^x+4^(1/x)=18
  5. Urgent Math! Please Help!

    2^-4 = -2 * -2 * -2 * -2 =16
  6. algebra

    6x+8y=24, 8y-6x=2 what is x and what is y? urgent! thanks:)
  7. Chemistry URGENT

    consider the following container of helium at 45C. intially the valve is closed. After the valve is opened what is the pressure of the helium gas. your start points are 2.00 atm and 9.00L. after opening you have 3.oo atm and 3.00L. The answer is 2.25 atm what formula did you ...
  8. chemistry

    silver iodide powder has been used as and antiseptic and as and agent to seed clouds for rain . silver iodide is 45.9% silver by mass . if you separtate a 50-g sample of silver and iodide , how much iodide is into its elements, silver and iodide how much silver would you have...
  9. Urgent chemistry help

    is there anything unusual about how the first elements are named when naming the compound? Is there anything unusual about how the second element is named when naming the compound? Why are the elements in the binary compounds combined in different ratios ( as shown by the ...
  10. ALGEBRA 2 URGENT! PLEASE HELP!

    Simplify 8(2^x-1)=64
  11. Algebra 2 URGENT

    Simplify: (1)/u^2-(2u)/(1)/(u^2-4)
  12. algebra 1 honors

    If r=5/3r+20/3, what is r? URGENT!!!!
  13. MATH URGENT!

    SIMPLIFY: x^2-4x-3
  14. Algebra 2 URGENT

    Simplify: 1/y^2-y-2+1/y^2+y
  15. Algebra 2 URGENT

    Simplify: (x)/(x-1)-(1)/(x+1)
  16. Algebra 2 URGENT

    Simplify: 4s^-2-(4t)^-2
  17. Algebra 2 URGENT

    Simplify: x+2/x^2+x-2/2x
  18. math(urgent)

    if x+ y is 25 more than x-y then x is what percent of y ?
  19. Urgent - Please Help!

    Does anyone here know anything about bowel movements?
  20. Algebra 2 URGENT

    Simplify: (1)/(z-4)-(1)/z+4
  21. Algebra 2 URGENT

    Simplify: 4s^-2-(4t)^-2
  22. Algebra 2 URGENT

    Simplify: 1/u^2-2u-1/u^2-4
  23. science PLEASE HELP URGENT:(

    how do i convert 4 g/ml to kg/m^3 ?
  24. Algebra 2 URGENT

    Simplify: (a-b)/(a^-1-b^-1)
  25. maths

    2x+5=x+9 urgent help needed
  26. urgent math

    solve 4(7^(x-2)) = 8
  27. Math please help urgent !

    y= u+3/u-1 u=x^1/3 find dy/dx at x=8
  28. Math URGENT!!!

    -32=8/7(3w - 1) Find w.
  29. maths. It's urgent

    solve for the value of x and y. X+y=15 x^y+y^x=30
  30. Urgent math help

    what is the x intercept y = -5x+20
  31. Algebra 2 URGENT

    Simplify: (1)/(t^2+t)+(1)/(t^2-t)
  32. Chemistry URGENT! I really need help!

    Consider the following reaction occurring at 298K BaCO3(s)-> BaO(s) + CO2 (g) show that the reaction is not spontaneous under standard condition by calculating delta G rxn. I calculated delta G and got 219.7 kJ, now the question asks if BaCO3 is placed in an evacuated flask...
  33. Chemistry! urgent

    what volume of gas at 40°C and 1.50 atm is necessary to react with 300 L of hydrogen gas measured at the same conditions? 2H2 (g) + O2 (g) --> 2H20 (g) 1.50 atm= 151.KPa How would I solve this? Because I can't use: PV = nRT I have pressure, temperature, r. There's no way I...
  34. Algebra 1--Please, help me! This is urgent!

    Solve each equation. 1). 4/5y + 1/3 <= -y 2.) 4/5h => -2
  35. Math (URGENT)

    Solve. 4(-1^2) = ? My calculator says its -4 I got +4 Help Please.
  36. math URGENT thx

    what is the rule? x 5 7 9 11 y 1 1.6 1.8 2.2
  37. Richard

    Please answer "Physics - URGENT" below.
  38. maths

    this is urgent y=1/2x - 1 if x equals 4 what does why equal? please help
  39. MATH urgent

    Hello!! 1. find the third derivative of f(t)=(t-1)/(t+1) 2. y= x^(x^2) ; dy/dx please help! thank you!
  40. ALGEBRA 2 URGENT! PLEASE HELP!

    Simplify (10x^2-6x-x^3)+(9x+x^3+5x^2)
  41. URGENT MATH

    Find h(t) + k(t) if h(t) = {(-4,5), (-2,-3), (0,5), (1,3), (3,-1), (5,5)} and k(t) = {(-3,-2), (-2,6), (-1,0), (1,0), (2,-6), (3,5), (4,0), (6,-2)}. (2 marks)
  42. HELP! URGENT!

    What is the pH of a 0.030M solution of KF? Ka of HF is .2 x 10^-4. THNX!
  43. maths

    how do you get 45 percent of something urgent thankyou
  44. Quick Question (URGENT)

    What does this symbol mean (#) thank you
  45. CALCULUS HELP URGENT!!

    find y' if arctan(xy)=6+x^(4)y
  46. Algebra 2 URGENT

    Simplify: 2x+5/4x^2 + 2x-5/10x
  47. Algebra 2 URGENT

    Simplify: 2x+5/4x^2+2x-5/10x
  48. To Ms. Sue urgent

    So do I have to write every country down??
  49. calculus(urgent pls)

    Integral of 1/[x^2(1+x^2)]
  50. Math Urgent

    Evaluate 2 ∫ |x+1| -3
  51. MATH

    HOW TO SOLVE THIS? ã8(ã10-1) PLEASE IT IS URGENT !!!!
  52. Precalcus Urgent HELP PLEASE

    Evaluate the function at the indicated value: g(x) = 3-x/3+x g(a-3)=
  53. ALGEBRA 2 URGENT

    6x/x-8 - 7x/x-1 = 5/x(2)-9x+8 / is fraction (2) is squared
  54. Math(urgent!!)please!

    3/4(2x-1)-5 is equal or greater than 5/4(x-3)
  55. Math URGENT!

    2. 9X-2=34+3X 4.x/3-15=12+x 6.11+4x=7+5x 8.-7+x=-8-x 10.0.45x+25=40+0.25x
  56. CHEMISTRY: URGENT DRBob222

    I thought it was similar so I wrote... x + y = 30cm^3 x + 2y = 61.5cm^3 i.e 2x + 2y =60cm^3 x + 2y = 61.5cm^3 therefore x= -1.5cm^3(volume of methane) and y= {61.5-(-1.5)}/2= 31.5cm^3(volume of ethane) However my teacher said the volume i got for ethane is wrong, because my ...
  57. Chemistry- DrBob222 Urgent Please help

    Name these: a) CH2=CH-CH=CH2 b) CH3-CH=CH-C(TRIPLE BOND)CH c) CH3-CH2-CH2-CH(Cl)-CH(Br)-CH3
  58. chemistry urgent

    a mixture of NO, CO2, and O2 gases has a total pressure of 2.5x10^3 torr. if the partial pressure of NO is 800 torr and CO2 is 600 torr, what is the partial pressure of O2? Dr. Bob. Please help
  59. CHEMISTRY: URGENT DRBob222

    Why was the reaction mixture titrated quickly? (question fom: A mixture of 0.50 mol of ethanoic acid and 1.00 mol of ethanol was shaken for a long time to reach equilibrium. The whole mixture was titrated quickly with 1.00 mol dm3 sodium hydroxide and 80cm3 of alkali were ...
  60. Urgent Chemistry

    The diffusion current for a standard is 1 x 10^-4M solution of hydroquinone is 17.5 microamperes. An unknown solution of hydroquinone, when diluted hundred folds and polarographed under same conditions yielded a current of 30.5 microamperes. Calculate the concentration of ...
  61. Chemistry(Urgent, please help)

    I need to find the order of a reaction with respect to the reactants. I set up my equation like this: 5.33e-2 M / 2.66e-2M = 1.03e-2 / 1.93e-3 I did the concentrations equal to the rates. I am just not sure what the units for rate should be. 2.00 = 5.33^m Did I set this up ...
  62. organic chemistry

    urgent, please help me...this is about the separation and purification scheme... there is 4 group of mixture: a)benzoic acid, benzoin and 1,4-dibromobenzene b)fluorene, o-toluic acid and 1,4-dibromobenzene c)phenanthrene, methyl 4-aminobenzoate and 1,4-dibromobenzene d)4-...
  63. Chemistry Urgent

    Calculate the DHof for the following reaction under standard state conditions: 2 Ag2S(s) + 2 H2O(l) ---> 4 Ag(s) + 2 H2S(g) + O2(g) Given the following information: Ag2S(s) ÄHof = -32.6 kJ/mol H2O(l) Ä Hof = -285.83 kJ/mol H2S(g) ÄHof = -20.6 kJ/mol
  64. English

    Original sentence: The urgent care center offers a variety of services such as physician appointments, mental health, health education programs, and lab and X-ray work. My corrections: The urgent care center offers physician appointments, mental health evaluations, health ...
  65. Math-urgent-

    What's 11/12 divided by 3/4 in repeated subtraction?
  66. Math- urgent

    Solve for x. x+4 (x+3) =17 Please show your work.
  67. character education

    what is the difference between important and urgent?
  68. College Algebra URGENT

    f(x)=1/(x+4) g(x)1/(6x+4) what is f(composed)g(x) if x does not equal -4/6 please help me
  69. Math - Urgent

    3-2/9b=1/3b-7 What does b equal? Please show all work
  70. math URGENT

    please factor 2.75x^2-7x-120
  71. Math- urgent

    Z/2-6=4 What does z equal? Please show your work.
  72. Math-URGENT!!!!

    write the parametric equations of -3x+1/2y=2/3. please help me!!!
  73. US HISTORY THIS IS URGENT!!

    WHAT WERE THE PEOPLE OF MASSACHUSETTS LIKE IN THE 1620S?
  74. Chem Urgent!

    I need help in balancing equation for NO2 + O2 -> NO + O3 Please help...
  75. math very urgent

    What is the area of a shape that that has 8 sides and has 1 , 1 , 8 , 1 , 1 , 3 , 3 and 10?
  76. math plz its urgent

    what values of the function y=-2x -4 for x= 0, 1, 2, and 3? A. 0,-6,-8,-10 B.-4,-6,-8,-10 it think its this one? C -4,-2,0,2 D. 0,6,8,10
  77. 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
  78. Science! NEED HELP URGENT

    What effect does amplitude have on velocity?
  79. adv functions urgent

    any math teachers around?
  80. math urgent

    Tan20+4sin20=√3
  81. English - Very urgent

    How does pearls represent hope?
  82. Integers (urgent)

    For what integer values of x is x+1-2 positive?
  83. Math- urgent

    How can -2.65 be written as the ratio of two integers?
  84. Not urgent but need answer

    when you say subract x from y do you mean : y - x or x - y. Whoever answers, thank you for your time y-x
  85. Math - Urgent

    2/3x+1/2x=5/6+2x What does x equal? Please show all work.
  86. Math- urgent

    Solve for x. 8x-(8+6x)=20 Please show your work.
  87. Math- urgent

    -4x-2+3x=4 What does x equal? Please show all work.
  88. Maths (URGENT!!!)

    2).Find the sum to n terms of 1/(1.2.3) + 3/(2.3.4) + 5/(3.4.5) + 7/(4.5.6)
  89. Science - Urgent.

    What is a electrostatic lifting apparatus? Please help..
  90. math too urgent

    how to construct 75 degree angle
  91. Math- Urgent

    2e= 4e-16 What does e equal? Please show all work.
  92. Urgent ~ Math

    3(x – 4) = 5(x + 2) (1 point) x = 11 x = –11 x = 1 x = –1 I think this is 11 am i correct or am i wrong?
  93. URGENT math

    (x-1)(x+3)-6=0 Solve by quadratic formula.
  94. Math- urgent

    -3 (x-8)+7x=12 What does x equal? Please show your work.
  95. Algebra 2 URGENT

    Simplify: x+2/x^2+x-2/2x Please Show All Work!
  96. Algebra II

    What is the sum of the geometric series 12 E 2(1/2)^x x=0 4 0 2 3 PLEASE HELP Urgent
  97. English! URGENT PLEASE HELP!

    Sentence for the word BEATIFICALLY?!?
  98. HELP THIS IS URGENT!

    HOW MANY OZS IS IN 100 LBS? PLZ HELP ME!
  99. Math(urgent)

    Find the domain of the function. s(y)= 3y over y+5
  100. Math- urgent

    X+4÷7=-2 What does x equal? Please show your work.
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