# chemistry! URGENT

61,637 results, page 3

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

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 ...

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 ?

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

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

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

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!

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

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 ...

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 ...

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?

67. ### character education

what is the difference between important and urgent?

69. ### Math - Urgent

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

73. ### US HISTORY THIS IS URGENT!!

WHAT WERE THE PEOPLE OF MASSACHUSETTS LIKE IN THE 1620S?

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

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?

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.

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)

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?

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