chemistry! URGENT

61,729 results, page 10
  1. Biology (URGENT PLEASE!)

    This is a question of my last biology test: Name at least one technological device that would have not been invented without scientific knowledge: A.Radio B.Ruler C.Knife D.None of the above I answered D but got a cross for it. So can you please help me to
  2. Calculus Help Please!!! Urgent!!!

    If x^3 - y^3 =3 , use only implicit diff. to find d^2y/dx^2 . Express your answer in terms of x and y only and write is as a proper fraction that is completely simplified as much as possible. d^2y/dx^2= -6x/y^5 (this is the answer I should get but i don't
  3. Physics-Urgent

    A sign with a mass of 23 kg is hanging in two wires both making an angle of 27 degrees with the vertical. Find the tension in one of the wires. Give your answer in newtons (N) and with 3 significant figures.
  4. British Lit----URGENT

    In James Joyce's "The Dead", Gabriel experiences an epiphany. This helps to make him a A)flat character B)stereotype C)round or D)Supernatural being.I feel it is A)flat, but an not sure.
  5. English (Urgent)

    Hi I'm writing an essay about No-No Boy. Does the following sentence sound alright, if not how do I make it sound better. I need help soon please! Two significant problems in this novel for him is overcoming self blame along with dealing with culturally
  6. Math Urgent

    Two surveyors with two-way radios leave the same point at 9:00am., one walking due south at 2 mi/hr and the other due west at 5 mi/hr. How long can they communicate with one another if each radio has a maximum range of 10 miles?
  7. maths-urgent

    Rudransh has a piece of cardboard in shape of a quadrilateral. He cuts it into two triangles such that angles formed at the vertices are bisected. He wants to find out whether the two triangles are congruent or not without actually super positioning them
  8. Chemistry urgent for my LAB today (22.09.11)

    0.250g of phthalic acid is dissolved in 40.00cm^3 of 0.100 mol dm^-3 NaOH. It requires 11.80 cubic centimeters of 0.100 mol\dm^-3 HCL fo neutralisation( to phenolphthalein) The mole ratio in which phthalic acid reacts with sodium hydroxide ihn 1:2 (a)
  9. Urgent Math

    Growing up,you lived in a village. When you left for college, the population was 840. You recently heard that the population has grown by 5%. What is the percent population?
  10. maths

    Two pole of heights 6m and 11m stand on a plane ground. If the distance between their feet is 12m, determine the distance the distance between their poles. Please help me its urgent

    Each carriage of a train has 45 people which includes 3 stewards and 1 guard. The train has 12 carriages. How many passengers are on the train?
  12. Calculus Help Please Urgent!!!

    Prove that the integral on the interval [a,b] of x is equal (b^2-a^2)/2 integral a to be (x)dx = (b^2-a^2)/2 using the definition of a Definite Integral. This is the limit of a sum approach. show steps please!!! Thank you!!!
  13. Math- urgent

    The second of two numbers is five more than the twice first. The sum of the numbers is 44. Find the numbers. Show all work.
  14. HELP! URGENT! (geometry)

    Helen stands 66 m away from the base of the tree. If the line of sight makes an angle of 30 with the top of the tree with respect to the horizon. What is the height (h) of the tree?
  15. urgent finance help

    There is neither gain or loss on sale of despreciable asset for an amount exactly equal to its A.aquisition cost value C.oportunity cost D.histicorl cost
  16. business/math

    please answer:a portfolio had an original value of $8500 eight years ag.the current value of the portfolio is $45389.what is the average geometric return on this portfolio? urgent response need please
  17. science

    how can i prepare this solution? Dissolve 24.82g of sodium thiosulphate in each cubic decimeter of solution to make astock of 0.1M. Dilute this solution 20-fold. URGENT PLEASE!!!!!!!!!!!!!!!
  18. Science ecosystems

    Paper Glass Aluminum Wooden ruler Sand Steak Pork chops Salad Bread Hair Cotton fabric Wool Cheddar cheese Can you tell why ? It is urgent ! Are they. Biotic or abiotic
  19. Legal Studies

    Hi beautiful people! I need help finding statistics on the rates of incarciration/fines or other punishments for person convicted of victimless crime in Australia. Preferably Queensland. This is urgent, I simply cannot find the information and I would

    can someone please give me a direct link to a picture that protrays or is related to the inuit being allowed to vote in canada in 1950. actualli the picture can have any type of aboriginal groups. thanks ...URGENT
  21. maths

    I don't know how to solve this question.urgent A one side open cylindrical drum has inner radius 28cm.and height 2.1m.How much water you can store in the drum.Express in litres.(1 litre=1000cc.)
  22. urgent calculus

    The position of a particle moving in a straight line is given by s(t) = 2sint - cost , from 0 to 2 pi where s is the displacement in metres and t is the time in seconds. Find the absolute max and absolute min displacements.
  23. steps please

    Use implicit differentiation to find the points where the parabola defined by x^{2}-2xy+y^{2}-6x+2y+17 = 0 has horizontal and vertical tangent lines. List your answers as points in the form (a,b).
  24. Calculus Need of Urgent help

    find the indicated limits, if they exist. 1. lim (3x^3+x^2+1)/(x^3+1) x-> -infinity 2. find the slope of the tangent line to the graph of the given function at any point: f(x) = 2x +7 Could anyone please, please, please explain to me how to do these
  25. Chemistry (urgent)

    Hi, I have a few chemistry problems that I'm having trouble solving. I put my attempted solutions after the problems in *'s. There was one problem I had no idea how to solve. What concentration of silver chromate (Ksp = 9.0 x 10-12) will dissolve to make a
  26. Urgent math

    A man gets a job with a salary of $40,000 a year. He is promised a $1900 raise each subsequent year. Find his total earnings for a 10-year period.
  27. ALG 2! plz help urgent!!

    Karen is 13 years older than Juan. The sum of their ages is 55. How old is Juan? (Be sure to type only Juan’s age in the answer blank. No variables or words.)
  28. Chemistry pretty urgent!!!!!!!

    Chemical bonding question! The partial Lewis structure that follows (Figure 1) is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The
  29. chemistry help urgent

    Please can someone help me before i pull all my hair out i've been struggling with this for about a week CH2=CH-CH-OH ________' _______CH3 i need to polymerize this compound and draw the structural formula it needs to contain three monomer units and i need
  30. geometry

    i need help with this geometry prblem my math book is online on this site: w w w . k e y m a t h . com / D G 3 the class passcode is: 1574-4c524 The chapter is 0 Lesson 0.2 pg. 9 problem number 6 REMEMBER 4-FOLD SYMMENTRY IS NEEDED !!! URGENT !!!
  31. Accounts (URGENT)

    If in the asserts-liability statement the value of the closing stock is $1580 and then there is an additional note which says: Stock valued at $4240 had been discarded during the year as it had deteriorated and could not be sold How will I account for it?

    answer in proper paragraph of 10-12 sentences What was the system of government called that was in place before the revolution? describe who were involved. Give some examples of what their occupations were. which types of people were for this type of
  33. History, Urgent

    How did the Louisiana Purchase set a precedent for the powers held by the President of the United States? If someone could copy & paste, I cannot follow links... and I need to know this. I have a test tomorrow, and i need to study. This is my last question
  34. Quick Help (URGENT)

    1. What percentage of teen parents live in poverty? Is it 75 percent?? 2. How can you get HIV? Unprotected sex, anal, oral, vaginal. 3. What are the other methods of transmission of HIV? ??? Can someone check over my answers and help me with number 3?
  35. geometry

    i need help with this geometry prblem my math book is online on this site: w w w . k e y m a t h . com / D G 3 the class passcode is: 1574-4c524 The chapter is 0 Lesson 0.2 pg. 9 problem number 6 REMEMBER 4-FOLD SYMMENTRY IS NEEDED !!! URGENT !!!
  36. Bio(its urgent!)

    according to cell theory, the cell is the basic unit of structure and function in the body. in two or more sentences, explain how this fact relates to the need for digestion. please i help! i have searched the sites but cannot find a answer...... plz help!
  37. History, Urgent

    Why did the Jamestown settlement almost fail? Settlers hunted for gold rather than plant crops. The settlement was led by Henry Hudson. Fur trading replaced farming as the main industry.
  38. HCS 325

    In the role of a health care manger, you are expected to respond to daily urgent and emergency situations as they arise by mobilizing your staff and available resources to attain specific objectives. How would you describe the function of control involved
  39. math - URGENT

    I'm don't understanding how to solve this question: The graph of a line passes through the x-intercept of y-20=2/11(x-31) and is perpendicular to the line y=1/7x+7 . The equation of the line, written in Slope-Point form, is y-p = m(x-q). what is the value
  40. Math

    You wish to paint your room. It's four walls measures 9ft high and 10ft wide. If one gallon of paint covers 120sq. ft, how many gallons of paint will you need? Please help?!!! Need this. Urgent.. With solutions please 🤖
  41. math urgent

    Billy chooses three dfferent non-zero digits and makes six different 3-digit numbers with no digit repeated in any number. He notices that one of the 3-digit nubers N say is the aerage of the other five. Find all possible values of N.
  42. Chemistry URGENT

    A student heated a hydrated salt sample with an initial mass of 4.8702 g, After the first heating, the mass had decreased to 3.0662 g (two part question) 1. if the sample was heated to constant weight after reheating, what is the minimum mass that the
  43. Physics/Chemistry HELP!! URGENT!!

    Arsenic in geomedia contaminates an aquifer by naturally occurring geological processes. The aquifer has a bulk density of 1.55 g/cm3 and a particle density of 2.63 g/cm3. The distribution coefficient, Kd value is 0.0370 L/kg. The initial concentration at
  44. Socials Study (URGENT)

    Okay, I need to write 2 editorials. the year is 1599, but i think any editorial during the "renaissance" will do. So, anyone have any ideas for 2 editorials i can write about?\ Thank you ver much.
  45. Urgent

    draw an angle x in the 1st quadrant with sinx=3/5, and an angle y in the 2nd quadrant with cosy=-12/13, then determine the exact value of tan(x+y).
  46. ALGEBRA! URGENT. Check Answers!

    1. 18x^2 + 6 + 4x - 15x^2 - 4 + 13x Answer: 3x^2 + 17x + 2 2. 3x^2 + 6 - 2x + 5x - 4x^2 + 9 Answer: -x^2 + 3x + 15 3. 3x^2 + 5x - 7x + 3 - 5x^2 + 2 Answer: -2x^2 + 2x + 5 4. In the expression -7x - 3x^2 + 5. What is the coefficient of x? Answer: I think
  47. Pre-Cal(Urgent)

    Find f X g , g X f , and f X f f(x) = 3sqrt x-1 g(x) = x^3 + 1 For f(x) the 3 is little above the sqrt sign. My answers were: f(g(x)) = 3sqrt x^3 + 1 -1 g(f(x)) = 3sqrt (x-1)^3 -1 f(f) = 3sqrt x-1-1 My teacher said these were wrong. Please help. I do not
  48. Physics URGENT!!!

    A 91.0 kg fullback running east with a speed of 6.00 m/s is tackled by a 73.0 kg opponent running north with a speed of 3.00 m/s. Where did the lost energy go?
  49. algebra II-URGENT

    the perimeter of a rectangular yard is 270 feet. If its length is 25 feet greater than its width what are the dimensions of the yard
  50. English

    plz can any 1 give me an article on ''Coping/Dealing with loss'' or u can also give me a story on the same topic bt plz fast It's urgent
  51. Pre-Algebra [urgent!]

    I can't find the solution to this problem; can someone please show me how to solve it step-by-step? Solve the equation for y in terms of x: 1. -8x + 5y = 10 Thanks! -MC
  52. Assembling an icosahedron--URGENT!

    I have to create an icosahedron and I need to know if the top of it needs to have the flaps IN? I put them OUT, and the glue is drying, so can anyone please tell me which way the flaps go? Does it even matter? pleeease help, thanks

    What distance would the skydiver fall during 7s of free fall ? Use the formula d= 4.9t^2, where in d is distance in meters and t is time in seconds. Pleeeeeeeeeese help me!!!!!!
  54. Calculator problem-- urgent!!!

    Hi, I'm trying to graph the equation "y=3x" on my graphing calculator BUT the "x" is in exponential form-aka small and up to the right of the 3. How do I graph it? I know that you go to "y=" and then I typed a 3, but how do I get that little x? Thanks very
  55. chem help urgent!

    i only have one submission for these and i dont' really know how to tell which one has the higher boiling point. can you help? Of each pair of solids, which one has the higher melting point? Kr(s) or Cu(s) and.. CCl4(s) or SiCl4(s)
  56. 7/8 Math URGENT!!!

    8 - 3x = 128 Subtract 8 from both sides. -3x = 120 x = 120/-3 x = -40 Can someone explain this to me?? I don't understand why you would subtract 8 and not add 8... also, why did the 3 suddenly become a negative? HELP ;D
  57. Math ....urgent help

    i just don't get this elimination method ..... plz help me plz.....teach me how to keep the x and y in a parallel line. and which number to multiply.....plz help -5x-4y=-11 10x=-6-y help me plz......
  58. science urgent

    how does Nacl use electrons to make a bond. (ionic compound) how does water use electons to make a bond (covalent compund)

    find the inflection points of the function: f9x)=x^2(ln(x)) Now I don't think there are any inflection points because both intervals are concave up. Am I right, or could someone help me if this is wrong?
  60. Geography (Urgent)...

    I need to know 3 reasons why my Ecological Footprint is smaller than the world average Footprint (3.4 vs. 2.2) I am unsure as to how mine alone is larger than the whole world's. THANKS -Dex
  61. French

    Hi guys cud anyone help me?? I need a simple letter in french, describing the new apartment I have moved in, to my friend. Its pretty urgent guys....Thanks in advance
  62. Science URGENT!

    I relly need help on these questions please help me :) 1. would karyotypes from the same family look similar? Explain. 2. Provide one reason as to why it would be useful to compare karyotypes of family members. 3.
  63. urgent physics help

    when the full moon directly overhead the angle from one edge of the moon to the other is measured to be 0.6970 if the diameter of the moon is 3650 km how far is it from the moon
  64. cooking URGENT

    i need to know if there is a substitute for sour cream i need to make banana bread, but most of the recipes ask for sour cream, which i don't have on hand right now. pleease help!
  65. Geometry- URGENT PLEASE HELP!!

    Medians $\overline{AX}$ and $\overline{BY}$ of $\triangle ABC$ are perpendicular at point $G$. Prove that $AB = CG$. In your diagram, $\angle AGB$ should appear to be a right angle.
  66. URGENT!! 7th Grade Math Help Please!!

    2. Price of the iPad Mini: $329.00 Price of the iPad with a 15% discount. Show all of your work please!! [4 points]
  67. chem urgent

    Calculate the mass ( kg ) of the solute benzene and the mass ( kg ) of the solvent acetone that should be combined to generate 1.51 kg of a solution that is 0.275 m benzene.
  68. URGENT HELP QUICK math rate of change

    A line with a slope of -2 passes through the point (1, 7). What is the closest point on the line above (1, 7) which has whole number coordinates?
  69. math/urgent

    PLEASE tell me how you are supposed to come to the answer to this. and what is the answer: a number x is y more than a number y times x i'm a little confused, and i have to teach this to a student. thanks a lot
  70. Urgent math

    so I tried to expand this question and I got x^3 *x2, i don't know if it's right but if not can I get a step by step explanation please, Expand (2x + y^2)^5. (Simplify your answer completely.)
  71. geometry

    please help find answer. very urgent. triangle PQR is a 30-60-90 triangle with right angle Q and segment PQ as the longest. Find the possible coordinates of R if (2,6) and Q (2,-6). please help
  72. Maths urgent

    One regular polygon has twice as many sides as another. If the ratio of the interior angles of the first to that of second is 5:4, find the number of sides in each polygon?
  73. english-URGENT NEED OF HELP!

    I need the format of a business letter, and a friendly letter! P.S: also need the spacings if they are any. I mean like the spacings(No. of lines) between ______ and _______.
  74. Trigenometry

    VERY URGENT! PLEASE HELP SOLVE! tan(x)+1=sqrt(3)+sqrt(3)cot(x)as well as sin(2x)= 2 cos^(x) 4cos2(x) = 8sin(x)cos(X)
  75. math URGENT!!

    the midpoints of the sides of a triangle are (1,1),(4,3),and (3,5). find the area of the triangle. please answer and show how u did it step by step please!!!!
  76. SCIENCE Biology (urgent)

    1.Do organisms benefit from being classified as a different species?How? 2.Importance of classifying organisms.. I;m not good in science...
  77. math-Urgent help please.

    A diver's elevation is -30 feet relative to sea level. She dives down 12 feet. What is her elevation after the dive?
  78. Calculus - urgent

    An isosceles triangle is inscribed in a circle of fixed radius R and centre O. What is the minimum area of the region outside the triangle and inside the circle?
  79. Chem Help Please Urgent!!!!!!

    What is the boiling point of a solution of 0.515 grams of acenaphthene (C12H10) in 15 grams chloroform (CHCl3) given pure chloroform has a b.p. of 61.7 C and a Kbp of +3.63 C. Thanks!
  80. urgent maths pls

    A goat is tied at point A with a rope of length(L). How long can L be so that the goat can feed on exactly half of the field if the field is a circle.
  81. Math Urgent

    To form a certain sequence, the rules are: 1)If a number is even, divide by 2 to get the next number 2)If a number is odd, multiply by 3, then add 1 to the the next number. Starting with 12,the 1000th term would be... a.1 b.2 c.3 d.4 THANKS

    When a ball is thrown upward, its height, h, in metres, is given by h=1.5 +19.6t -4.9t², where t is the number of seconds after it is thrown. For what length of time is the ball above the ground?
  83. Calculus - urgent

    A lamina. defined by y>=0 with edges y=0, y=3/2(1-x^2) and x=-y+2y^2, for which the density is given by p(x,y)=y. a) define domain as union of type 1 and type 2 region. b) Calculate mass of lamina.
  84. earth science urgent

    in the continental United States, what happens to rain that falls west of the Great Continenetal Divide? Rain that falls east?
  85. URGENT: Grade 8 Math

    In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?
  86. English

    I forgot the last two sentences. They are urgent!! 1)Can you write your name and e-mail on this sheet of paper so that we can get in touch with you (each other?) when you are back in America? 2) I would be pleased if our students could start sending
  87. Socials (URGENT)

    Why did the canadian government feel the need to control the economy, transportation and trade after war was declared in 1914? Was this a genuine need? Explain. Hi, I need some help on the second half of the question. Was it a genuine need? I can't find
  88. Violence Action Plan (URGENT)

    What are five or more different things students in school could do to prevent racism? 1. Multicultural Day could be one strategy. Students would be asked to bring in food samples from their culture. 2. 3. 4. 5. Can someone help? I only have one. Any help,
  89. Pre-Algebra[URGENT]

    Need help on solving this one as well- A local telephone company charges $9.75 per month for basic service and $0.20 for each call made. You are allowed to spend more than $17.00 but less than $21.50 a month. What are the most calls you can make and remain
  90. physics urgent

    A 1.5 m tall man stands 2 m in front of a flat wall mirror. Please find: image distance and height of image I have the formulas but i don't know how to solve this without the focal point or a radius...pls help!!!!!!!
  91. Physics urgent

    A rubber puck, initially travelling at 39 km/h, is sliding along an icy surface. How long (in seconds) would it take the puck to come to a complete stop if the coefficient of kinetic friction between the puck and the ice is 0.2?
  92. Algebra 2 help its urgent please(:

    Jacob is standing 112 m from a building. The angle of elevation when he looks up to the top of the building is 62°. How tall is the building? Enter your answer, rounded to the nearest tenth I'm really confused on this question
  93. Math

    What is the constant of variation? An x-y table shows the following coordinate pairs: four comma fifteen, five comma twelve, and six comma ten. Answer 1 3 thirty sixty I have been stuck on it all day. I am in urgent need of help
  94. Honors Biology - URGENT!!!

    Remember that the greater the concentration of hydrogen ions, the lower the pH of a solution. How do you suppose the pH of the solution in the thylakoid space compares with the pH of the solution in the stroma? What is responsible for the difference?
  95. Science

    What would the application be to my experiment which was "We dig through soil and check for inorganic and organic matter in the soil and look for natural things in the soil(ex; beans,feather,rocks,sticks,and grass)" Please I need your help URGENT! ! !
  96. Honors Biology - URGENT!!!

    In an experiment, plants were grown under colored filters that allowed equal amounts of light of different colors to strike different plants. Under which filter do you think plants grew the slowest? Why?
  97. Physics Urgent!!!!!

    Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be
  98. Math. Urgent please help

    ABC is an isosceles triangle. If AB =AC =16, BC=8. D is the midpoint of side AC , and G is the centroid of triangle ABC , find BD .
  99. VERY URGENT MATH(Formalizing Relations & Functions

    What is the domain of the function below? {(0,2), (3,1), (5,2), (8,4)}? (1point) Is the following relation a function? {(0.3, 0.6), (0.4, 0.8), (0.3,0.7), (0.5,0.5)} (1point)

    Triangle ACE is a circumscribed triangle. Points B, D and F are the points of tangency. If AC= 16 and AE is 9 cm and CE = 15 cm . Find AD, FE and CD HELP PLEASE VERY URGENT