1. Chemistry

    Ionic bonding typically occurs when a ______________ bonds with a ______________
  2. Chemistry

    Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you
  3. Chemistry

    Ok, so in an when an endothermic reaction occurs, is it hot or cold? and why? Also what is it for an exothermic reaction? Thank you
  4. Chemistry

    Write mathematical equations that show how you will calculate the detected activity from the count rate due to background radiation and the sample of KCl and how you will determine the “true” activity of your sample from the detected activity. Use the
  5. 11th grade math

    A box without a lid is constructed from a 38 inch by 38 inch piece of cardboard by cutting in. squares from each corner and folding up the sides. a) Determine the volume of the box as a function of the variable . b) Use a graphing calculator to approximate
  6. GOVERNMENT

    TWO QUESTIONS 1. Discuss 2 limitations the supreme court has imposed on the exercise of 1st Amendment rights to free speech? On what grounds have these limitations been justified? 2. What is due process of law? Describe 2 of the due process guarantees
  7. English

    How are you feeling? 1. I am delighted. 2. I am thrilled. 3. I feel overjoyed. 4. I feel disgusting? 5. I feel anxious. 6. I feel dissatisfied. 7. __________ 8. ___________ ----------------------------- Are the answers all correct? What other common
  8. Calculus

    If an arrow is shot straight up from the surface of the moon with an initial velocity of 100 ft/s, its height in feet after t second is given by s(t)=(100t)−(83/100)(t^2). Use the limit definition of the derivative to find the answers to the following
  9. chemistry

    Hey...how r u guys..thanks for helping me on my previous questions...can u help me solve two questions and check one? Thanks, all the questions are related to the info given: In some industrial processes, sodium chromate is added to water coolants. When
  10. Science

    One light bulb in a string of lights goes out this causes all other lights in string to go out. This is example of A. Resistor B. parallel circuit C. Closed circuit***** D. Series circuit When a switch is turned from the off to the on position it is
  11. chemistry

    home / study / questions and answers / science / chemistry / a chemical engineer studying the properties of ... Question A chemical engineer studying the properties of fuels placed 1.760 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2
  12. math

    I have a couple of math questions that i cant seem to get to work out. can someone help me please.? 1.) (x/x+6)-(6/x-6)=(x^2+36)/(x^2-36) 2.) (r-2)-(2-r)=0 3.) add (8/ty^2)+(9/t^2y) 4.)add (7/w)+(8/w^2) 5.)add ((r+10)/r)+(r/(r+10)) 6.) divide
  13. Chemistry

    Hi! I am doing this chemistry lab of solubility curve of a solid investigation and this is for KCl. The purpose of this lab is to investigate the relationship between the solubility of potassium chloride and the temperature of its solution and to create a
  14. Chemistry

    Hi! I am doing this chemistry lab of solubility curve of a solid investigation and this is for KCl. The purpose of this lab is to investigate the relationship between the solubility of potassium chloride and the temperature of its solution and to create a
  15. economics

    19-1 Bicycle Insurance and Information Asymmetry If bicycle owners do not know whether they are high- or low-risk consumers, is there an adverse selection problem? 19-2 IPOs and Adverse Selection Should owners of a private company contemplating an IPO (a
  16. economics

    19-1 Bicycle Insurance and Information Asymmetry If bicycle owners do not know whether they are high- or low-risk consumers, is there an adverse selection problem? 19-2 IPOs and Adverse Selection Should owners of a private company contemplating an IPO (a
  17. W.history

    Has anybody read Lord of The Flies?? Yes. Many of us have read Lord of the Flies. If you post your questions and your answers, we'll be glad to critique them for you. OK well, 1.Who is the leader of the choir boys? I think it is their teacher 1.Who is the
  18. math

    abbi invested 1,500 dollars in a certificate of deposit with a simple interest rate of 4 percent. find the interest earned in 6 years. then find the total of principal plus interest
  19. Dynamic Earth

    In Egypt, the Great Pyramids of Giza face slightly east of true north. Explain why the pyramids might not line up with true north as builders likely intended. Assume that the builders 4500 years ago could determine directions accurately. I tried searching
  20. Chemistry

    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 in "how many moles of Cu2O are
  21. geometry

    Hello I have an assignment were I have to answer the following questions. I have posted the questions and their answers below can someone please read over them and see if what I wrote is correct and if it is not how do I fix it? Thank You ! 1.Who was
  22. English

    1. What's your favorite subject? - My favorite subject is social studies. Why do you like social studies? - Because it's interesting and informative. 2. What subject do you like most? - I like Chinese letters most. What makes you like Chinese letters so
  23. Calculus- answer check

    A brand new stock is also called an initial public offering. This model predicts the percent overvaluation of a stock as R(t)=9t((t-3)^3/2.718) where is the overvaluation in percent and t is the time in months after the initial issue. Use the information
  24. to kill a mockingbird

    I'm reviewing for my test about the novel "To Kill a Mockingbird". There's this question I can't answer: 1. What are the generalizations (like stereotyping) made about black people? Who makes them? And how are black people affected by it? The same question
  25. Cell Biology Help Please!

    1) AMP -activated protein kinase (AMPK): Option A: is activated by both AMP and ADP. Option B: undergoes allosteric regulation. Option C: all of the choices are correct. Option D: adds phosphate groups to serines and threonines in other enzymes. 2) Which
  26. Help Please!

    1) AMP -activated protein kinase (AMPK): Option A: is activated by both AMP and ADP. Option B: undergoes allosteric regulation. Option C: all of the choices are correct. Option D: adds phosphate groups to serines and threonines in other enzymes. 2) Which
  27. Health

    Vivian has been having abdominal pains for the past week. Now that she has started her new job and received her new health insurance, she is finally able to schedule an appointment with a doctor. As Vivian arrives in the waiting area of the new doctor’s
  28. math

    The set S has the property that if a is in S, then a squared + a is also in S. What set could be S? The answer is {1,0}. How do you get this answer? What numbers squared are itself? one and zero But what exactly is a set and what is a? I'm not sure,
  29. Math

    There is a football field and the length shows 120 yd and the width is 53 1/3 yd a. What are the dimensions of a football field in feet? b. A chalk line is placed around the perimeter of the football field. What is the length of this line in feet? c. About
  30. Chemistry-w/addition

    At elevated temperatures, SbCl5 gas decomposes into SbCl3 gas and Cl2 gas as shown by the following equation: SbCl5(g) SbCl3(g) + Cl2(g) (a) An 59.8 gram sample of SbCl5 (molecular weight 299.0) is placed in an evacuated 15.0 liter container at 182°C. 1.
  31. science!

    this question is not a question but 20 questions. i appreciate if you review all my answers, but i wont provide an answer for the last question (most probably since i didn't finish answering it or typing it out since i only have an hour to do that). now,
  32. social studies help???

    ive been stuck on these 2 questions for a while can you answer them ?? Farmers in the north face which problem that those in the southern region do not ? A. infrequent rain limits plant growth B. the worst pollution in the country is found here. C. they
  33. Calculus

    I'm a bit confused about the average equations with integration. I need to solve this problem, and I think I'm supposed to use substitution, but I can't get it to work. The problem looks like this: z(t)=4tsin(t^2), [0,π^1/2] Any input?
  34. 5th math

    what is the average number of hot dogs sold? 12,12,13,17,21,22,22,22,22,30,32,37. please! show me this how to solve this problem? my last question for today.thank you very much without your help . it;s impossible to understand this problem.
  35. Science

    Madeira uses the water cycle to generate electrical power but this becomes a problem during the summer. What is the problem and explain the renewable energy solution.
  36. Math

    I posted this problem the other day and someone answered it but when I checked my book I realized that I wrote the problem wrong. The answer is suppose to be 43/128 and I can't get it. Thanks (1/4)^2/(1/2-3/4)+ 3/2^3
  37. ALGEBRA 2

    Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
  38. Math

    I really need help with a quadratic question. So the problem is kx^2+[k+2]x-3=0 has roots which are real and positive. Find the possible values that k may have. The answer is -8+ √60
  39. Physics

    Write a projectile motion problem with the initial condition vi=15 m/s at 50° above the horizontal. Solve this problem for ∆x, max height, and time of flight.
  40. Math(Please Check)

    Problem: 4x/(x+2)-8/(x-1) What I Got: 4x^2-4x-16/(x+2)(x+1) *I had to simplify the rational expression No. At x=0, it doesn't check. The starting problem gives 8, your answer gives -8. I suspect a sign error somewhere. Probably in the denominator, the x+1
  41. math

    Create your own word problem that uses a system of equations to solve. Your problem must include the following words: beach,hammock,dance,and troll.
  42. SAT Math

    I don't remember what problem I struggled to understand... But it was something like this... There are 3000 numbers so how many of them are odd.. Something like that.. Please give me a problem like that and please teach me!!!! I hope you know what I am
  43. Algebra

    Slove each system by substitution. 4x = y - 1 6x - 2y = -3 I have already attempted this problem and couldn't figure out what I should do. I came out with 4x + 1 = 3x + 1.5 I think this looks right because our teacher told us that for this specific problem
  44. chemistry

    hi Dr Bob..can you please help me with this chemistry problem? I got problem dealing with the chemical formula.How i want to find the number of moles of 2g of Fe(NH4)2(SO4)2.6H2O???please help me.Thank you
  45. ALGEBRA 2

    Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
  46. Economics/Geography

    One of the stages of economic growth is capital intensive, where wealth is created through the efficient use of money and industrial manufacturing occurs. What latin american country fits into this stage & why?
  47. economics

    Suppose you decide to elicit high CEO effort when and if good luck occurs by paying the bonus for $1 billion outcomes only. What criticism can you see with this incentive contract plan?
  48. incentive contract

    Suppose you decide to elicit high CEO effort when and if bad luck occurs by paying the bonus for $1 billion outcomes only. What criticism can you see with this incentive contract plan?
  49. chemistry

    Suppose that 0.450 of methane,CH4(g) , is reacted with 0.600 of fluorine, F2(g), forming CF(g) and HF(G) as sole products. Assuming that the reaction occurs at constant pressure, how much heat is released?
  50. English / Grammar Check

    Can you please tell me if this sentence is in formal language and the grammar is correct? In the novel Manhattan Transfer, manifestation of the fake social face occurs. The characters use masks, because they have trouble trying to find their real self.
  51. psychology

    When anxiety occurs in brief but very intense episodes that usually consist of a pounding heart, sensations of choking, shaking, and feelings of impending death, a diagnosis of ________ may potentially be made.
  52. chemistry

    The redox reaction below occurs in acidic solution. Balance it with the smallest whole number coefficients and determine the coefficient for H+. MnO4-(aq) + HNO2(aq) ---> Mn2+(aq) + NO3-(aq) when i did it..i got the answer as1...but im not to sure..help?
  53. science

    Which of these is an example of a chemical reaction that occurs at a very fast rate? A: Rotting wood. B: An explosion. C: Photosynthesis. D: Iron rusting. I personally think it's A, but I'm not completely sure of my answer, which is why I referred to
  54. chemistry!!!!!!

    What structure is common to all aromatic hydrocarbons? You must be referring to the benzene ring, either separately or in combination with alkyl groups or other aromatic structures. UM.. SORRY DrBob222 BUT i THINK IT IS JUST THE benzene! i DID SOME
  55. Algebra correction

    The last one which you were asking where the b came from I typed the wrong problem sorry. the problem is 49-a^2b^2 Is the answer: (7+ab)-(7ab)
  56. math

    can someone let me know if this is the correct answer for this problem.. (3+8)+2=(8+3)+2- would this problem be consired Associatve?
  57. Basic Algebra

    I am having a hard time trying to figure out this problem, if someone could help me...I'd appreciate it: I have to solve the problem 7x-(6x+4)=4
  58. Algebra help please.

    So, I carried this problem through: (0,5) M=-2 y=-2x+B 5=-2(0)+B 5=0+B 5=B y=2x+5 How do I write this in standard form? Did I do this problem right? Thanks!
  59. Math 6th Grade

    2 1/4 r = 10 A. 4 3/4 B. 4 2/5 C. 4 4/9 I having a little bit of trouble on this problem. Can you show me how to solve the problem?
  60. Math

    How do you do this problem its a literal equation problem. S = 2πr2 + 2πrh
  61. Algebra

    Given that f(x) = x^2 -3 and g(x) = 2x+1, find each of the follwing, if it exists. Problem 1 (f/g)(-root3) Problem 2 (g/f)(-1/2)
  62. Algebra

    Given that f(x) = x^2 -3 and g(x) = 2x+1, find each of the follwing, if it exists. Problem 1 (f/g)(-root3) Problem 2 (g/f)(-1/2)
  63. Math

    Can someone please work out the steps in solving this elimination problem. Thank you. The problem is x + 2y = -7 x - 5y = 7
  64. Algebra

    Given that f(x) = x^2 -3 and g(x) = 2x+1, find each of the follwing, if it exists. Problem 1 (f/g)(-root3) Problem 2 (g/f)(-1/2)
  65. Algebra1b

    Need help with problem -4x=8 Please show me how to work problem Well divide over the -4 so you can find x -4x=8 x= -2
  66. math

    I've got a problem i need help on i need to find the proper comparison symbol the problem is xy yx
  67. algebra

    Need help with this problem 8x-5y=20 5y-8x=-20 Please help me with this problem Solve the system of equations by graphing.
  68. Math

    Write a word problem using 7 groups. Solve the problem
  69. math

    How can I solve this problem by subtract (1) -2.3-(-8.8) How can I sove this problem by multiply (2) (1.3)(10)(-4)
  70. algebra

    Describe how you know if an inequality is an “and” or an “or” problem. (use -3 < x+5 < 8). Also, how do you know if an absolute value question is an “and” or an “or” problem?
  71. Math

    Can you please helop with this problem? Solve this problem: -x/3 is greater than or equal to 2 Thank you
  72. math help

    This problem is a little different Simplify: ^5 sqrt symbol(x^7 y^4) How would I solve this problem?
  73. Algebra

    Write a story problem that is associated with this proportion, then solve your problem. 5/$21 =12/n
  74. Solving rational inequalities

    problem #1 (1+x)/(2x+3) 2 graphically TIA please ignore this
  75. math

    Solve x^2+2x-4=0 When i try to factor this problem out I cant get it to work. Is this a no solution problem
  76. environmental science

    why is sewage a problem and how have human activities contributed to this problem?
  77. English

    I have to write a problem-solution essay and I can't think of a topic. Please help. It can be about any problem.
  78. maths

    Can any one help with the following please: Solve the initial-value problem: problem: dy/dx: 4(3cos(6x)-1)/1+2x-sin(6x) y=12 when x=0
  79. Math

    i am still having problem with getting answer to problem 2 divided by a number equals 3/4. i need help please
  80. Math

    Write a story problem that is associated with this proportion, then solve your problem. 5/$21 = 12/n
  81. Math

    I'm stuck on this 1 math problem. I've tried many ways to figure it out, but I can't. The problem is; 2(3x-5)>2x+6.
  82. Glenview

    if you have 2 sets of 2 numbers in one math problem how do you get themode for that problem.
  83. AVID

    this is about cornell note taking...i'm done taking notes but i'm having trouble with the summary and the question area...i don't know what to ask ....for the question part...so can u help? The question area...put in a question that you think the teacher
  84. Physics

    A baseball is his so that a travel straight upward after being struck by the bat. A fat observes that it takes three seconds for the ball to reach its maximum height. Find the balls initial velocity and the height it reaches. my professor showed a similar
  85. English

    Writeacher, I need your help to improve the questions below. I included part of the answers to make sense of the questions. Students should be able to develop their answers by writing ten-line paragraphs. 1) Describe the details of Winston Smith's life as
  86. algebra

    Ok my math assignments look something ike this... The formula I=prt gives the amouunt of simple interest I earned by principal p at an annual interest rate r over t years. Solve this formula for p. B. Find p if r=0.035, t=4, and I=$420. c. Writing.. That
  87. business Maths

    Bill Moore is buying a used Winnebago. His April monthly interest at 10% was $128. What was Bill’s principal balance at the beginning of April? (Use 360 days a year. Do not round intermediate calculations. Omit the "$" sign in your response.)
  88. Algebra

    Rationalize V stands for square root 3/V2 3/V2 x V2/V2 = 3V2/V2V2= 3V2/V4 =3V2/2 Answer 3V2/2 6V2/V3 6V2/3 x V3/V3 =6V2V3/V3V3 = 6V6/3= 2V6 My book gives these two examples. In the first problem you multiply the 2 in the denominator and get 4. It the
  89. Calculus

    I'm having trouble trying to figure this problem out, I know the variables of the problem but I don't seem to get the right answer here is the formula that i'm using: A = P (1 + r/n)^n * t. Here is the problem: If Joe deposits $12,000 into an account that
  90. math 5TH GRADE

    write a story problem that represents each division expression.then solve the problem a. write a story problem that represents 528/24 divided
  91. pre algebra

    Reiny can you please help with these 3 problem. 1. a1=-4;an-1-3 this is find the first five terms of the recursively defined sequence. Problem 2 and 3 is write the first terms of the explicitly defined sequence an=4n+2. problem 3 an=2(-3)n-1
  92. Science

    Can someone please check my answers? I would greatly appreciate it. Thanks! 1. Which of the following inner planets has virtually no atmosphere? a. Mercury*** b. Venus c. Mars d. Earth 2. Which of the following statements about the inner planets is true?
  93. Math

    1: Goldbach's Conjecture is a famous conjecture that has never been proven true or false. The conjecture states that every even number, except 2, can be written as the sum of two prime numbers. For example, 16 can be written as 5+11. 1 a: Write the first
  94. math,correction

    Is this correct or no. I need help in a couple of problems can someone explain them to me. Problem#1 directions: Factor each expression a^2(b-c)-16b^2(b-c) My answer is: (b-c)(a-4b)(a+4b) PROBLEM#2 dIRECTIONS: Find a value for k so that 2x^3-kxy^2 will
  95. algebra 1

    4. Given the irrational number .14147…. choose an inequality which approximates to the 4th decimal place. a) .14 < x F d) Both (b) and (c D? If x < 0 and y > 0, then it is always true that _______. a) xy is a negative number b) x + y is a negative number
  96. classical physics

    Question 14 Give reasons for the answers to each of the following questions: a) Can a normal force be horizontal? b) Can a normal force be directed vertically downward? c) Consider a tennis ball in contact with a stationary floor and with nothing else. Can
  97. English

    1. I have a lot of work to do. - Why don't you ask your brother to help you? - You should ask your brother to help you. - So you can't go out to play soccer, can you? - (Somethine else) 2. I am going to Vietnam this winter. - Really? Congratulations! -
  98. economics

    Which of the following is most likely to be purchased in the factor market? You will choose two answers for this question. Shampoo and dog food Cement and copper wire Opera tickets and sushi Automobiles and deodorant Dirt and timber I know that dirt and
  99. ict year 8

    i know this question has been asked before but i can`t find the answers on the other sites mentioned before. I need to find the definition of intranet, advanced search , search engine , attachment , groups, html, and hyperlink and also i need to give
  100. Biology

    21. The difference between autotroph and heterotroph is that a. heterotrophs must get energy from sources other than the sun b. heterotrophs can use chemical or light energy sources c. heterotrophs do not obtain energy from autotrophs d. all of the above