Popular questions and responses by jerry
  1. Chemistry

    Write a molecular equation for the precipitation reaction that occurs (if any) when the following solutions are mixed. If no reaction occurs, write NOREACTION. Are my answers below correct? I used the textbook 1. sodium chloride and lead (II) acetate

    asked on October 5, 2010
  2. chemistry

    Which of the following reactions have a positive ΔSrxn? Check all that apply. A(g) +B(g) -----> 3C(g) A(g)+ B(g)------> C(g) 2A (g) +2B (g)-----> 3C(g) A(s)+B(s)------> C(g) I picked the first one and it marked me wrong. Please help(:

    asked on March 14, 2012
  3. college physics

    A 0.50-kg block slides along a small track with elevated ends and a flat central part. The flat part has a length L = 1.85 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.103. The block

    asked on March 25, 2012
  4. Math

    Each triangle is a 30-60-90 triangle, and the hypotenuse of one triangle is the longer leg of an adjacent triangle. The hypotenuse of the largest triangle is 8 centimeters. What is the number of centimeters in the length of the longer leg of the smallest

    asked on December 29, 2015
  5. math

    Which table shows a function that is decreasing only over the interval (–1, ∞)?

    asked on October 1, 2019
  6. CHEM

    Consider the reaction, 3 NO2(g) + H2O(l) ® 2 HNO3(aq) + NO(g), where DH = – 137 kJ. How many kilojoules are released when 92.3 g of NO2 reacts?

    asked on March 21, 2012
  7. Chemistry

    A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq) +H2O (l) --->ADP(aq) +HPO4^2- for which

    asked on March 14, 2012
  8. Chemistry

    When the oxide of generic metal M is heated at 25.0 °C, only a negligible amount of M is produced. O2M(s) ----> M(s) +O2(g) delta G= 288.9 Kj/mol When this reaction is coupled to the conversion of graphite to carbon dioxide, it becomes spontaneous. What

    asked on March 14, 2012
  9. earth

    Body on surface of earth weighs 400 lb. Radius of earth is about 4000miles. If same body were placed on 4000 mile high tower, what would its weight be

    asked on January 20, 2012
  10. Chemistry

    HCl(aq)+Li2CO3(aq)→ Express your answer as a chemical equation. Identify all of the phases in your answer. Enter noreaction if no precipitate is formed.

    asked on July 1, 2018
  11. physics

    a positive point charge q sits at the center of a hollow spherical shell. The shell, with radius R and negligible thickness, has net charge -2q. find an expression for the for the electric field strength (a) inside the sphere, rR. in what direction does

    asked on September 16, 2009
  12. Algebra

    Boris is driving to Memphis. Suppose that the distance to his destination (in miles) is a linear function of his total driving time (in minutes). Boris has 58 miles to his destination after 21 minutes of driving, and he has 42.6 miles to his destination

    asked on September 11, 2016
  13. chemistry

    the density of an aqueous solution containing 10.0% by mass ethanol is 0.984 g/ml. calculate molality and molarity. what volume of the solution would contain 1.15 g ethanol ?

    asked on May 4, 2016
  14. Math - Business Calc.

    Chocolate Box Company is going to make open-topped boxes out of 5 × 17-inch rectangles of cardboard by cutting squares out of the corners and folding up the sides. What is the largest volume box it can make this way? (Round your answer to the nearest

    asked on June 4, 2014
  15. singapore math

    Kim, Mei and yante collect stamps. Kim and Mei have 220 stamps more than Yanti. Yanti and Mei have 140 stamps more than Kim. Kim and Yanti have 500 stamps. How many stamps does Mei have?

    asked on August 2, 2017
  16. Math

    Assume that it costs Apple approximately C(x) = 36,100 + 100x + 0.01x^2 dollars to manufacture x 30-gigabyte video iPods in a day. How many iPods should be manufactured in order to minimize average cost? What is the resulting average cost of an iPod? (Give

    asked on June 4, 2014
  17. Chemistry

    Calculate the percent composition by mass of each element in Al(OH)3 Use at least 3 significant figures. %Al = %O = %H=

    asked on September 18, 2011
  18. English

    What is your opinion of the idea that the dangers we face may lie beyond our understanding? I just need some idea's, please help me out. I'm not that good at writing essays.

    asked on May 6, 2014
  19. 12th grade chemistry

    A piece of iron wire weighs 2.225g. It is dissolved in acid, which oxidizes the iron to iron(II), and made up to 250 mL. A 25mL sample required 31.0 mL of a 0.0185mol/L solution of potassium dichromate. Calculate the percentage of iron in the wire.

    asked on November 10, 2008
  20. Chemistry

    2. The reaction can be described in words as follows: aluminum sulfate reacted with ammonium hydroxide forming the insoluble product or precipitate, aluminum hydroxide and the water-soluble ammonium sulfate. The chemical equation can be written as follows

    asked on June 24, 2018
  21. Math

    Consider a market where supply and demand are given by QXS = -14 + PX and QXd = 85 - 2PX. Suppose the government imposes a price floor of $38, and agrees to purchase any and all units consumers do not buy at the floor price of $38 per unit. a. Determine

    asked on September 15, 2015
  22. stastics

    For each of the following confidence intervals, indicate how much of the distribution would be placed in the cutoff region for a two-tailed test from 80%, 85% and 99%

    asked on April 8, 2013
  23. Stats

    Suppose the time it takes for a purchasing agent to complete an online ordering process is normally distributed with a mean of 8 minutes and a standard deviation of 2 minutes. Suppose a random sample of 25 ordering processes is selected. The standard

    asked on November 13, 2011
  24. Chemistry

    For the reaction: H2(g) + I2(g) 2HI(g) , Kc = 12.3 at some temperature T. If [H2] = [I2] = [HI] = 3.21 x 10-3 M at this temperature, which one of the following statements is true? 1. ) Not enough information is given to answer the question. 2. ) The

    asked on October 25, 2009
  25. statistics

    Evolutionary theories often emphasize that humans have adapted to their physical environment. One such theory hypothesizes that people should spontaneously follow a 24- hour cycle of sleeping and walking- even if they are not exposed to the usual pattern

    asked on July 18, 2009
  26. algebra

    How would you enter the equation y + x2 = -1 into your calculator in order to graph it?

    asked on June 14, 2016
  27. math

    Tim Tele received a $380 discount loan to purchase a DVD player. The loan was offered at 18% for 60 days. Find the interest in dollars and the proceeds for the following problem.

    asked on March 22, 2016
  28. Social Studies (Help!)

    Why did the English want to hide their colony from Spaniards? Please help!!!!

    asked on December 1, 2015
  29. psychology

    Why is reinforcement generally preferable to punishment in promoting behavior modification?

    asked on July 7, 2010
  30. Chemistry

    When heated, lithium reacts with nitrogen to form lithium nitride: 6Li+N2 --> 2Li3N What is the theoretical yield of Li3N in grams when 12.4 g of Li is heated with 33.9g of N2

    asked on June 12, 2010
  31. Statistics

    The closing price of Schnur Sporting Goods, Inc., common stock is uniformly distributed between $16 and 29 per share.Exercises What is the probability that the stock price will be: More than $23? Less than or equal to $19?

    asked on March 31, 2011
  32. Alegebra

    Working alone it takes Jerry 9 hrs to mop a warehouse. Ruth can mop the same warehouse in 10 hrs. If they worked together how long would it take them?

    asked on December 17, 2009
  33. statistics

    Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test(high scores mean more anxiety) The scores are as follows.

    asked on July 18, 2009
  34. chemistry

    A 0.03 mol sample of NH4NO3(s) is placed in a 1 L evacuated flask, which is then sealed and heated. The NH4NO3(s) decomposes completely according to the balanced equation above. The total pressure in the flask measured at 400 K is closest to which of the

    asked on January 8, 2009
  35. chemistry

    whata the period block and group in which elements with the following electron configuration is located? a) [Ne] 3s^23p^4 b) [Kr] 4d^105s^25p^2 c) [Xe] 4f^145d^106s^26p^5

    asked on May 20, 2008
  36. Chemistry

    2. The reaction can be described in words as follows: aluminum sulfate reacted with ammonium hydroxide forming the insoluble product or precipitate, aluminum hydroxide and the water-soluble ammonium sulfate. The chemical equation can be written as follows

    asked on June 24, 2018
  37. Math

    For safety reasons, the angle between a ladder and the ground should be between 65° and 80. A ladder that is 5 m long is placed so that it reaches a window on the top floor of a house. If the foot of the ladder is 1.5 m from the house, is the ladder safe?

    asked on February 22, 2018
  38. english

    Help please. 26. Write a paragraph that answers the questions below. Include at least two supporting details or examples. In “the literature of the Americas,” Kimberly Koza writes; “By discovering the literature of our neighbors, we may also learn

    asked on September 17, 2017
  39. algebra 1

    The base of a triangle is 3 cm greater than the height. The area is 27 cm squared. Find the height and base of the triangle.

    asked on December 15, 2016
  40. Math

    a shop has one pound bags of peanuts for $2.00 and three-pound bags of peanuts for $5.50 if you buy 5 bags and spend $17, how many of each size bad did you buy?

    asked on September 29, 2015
  41. physics

    Part 1/2 A cyclist maintains a constant velocity of 7 m/s headed away from point A. At the.aome.initial time, the cyclist is 240 m from the point A. What will be his displacement from starting point after 65 s ? Answer in units m Part 2/2 Qhat will be his

    asked on September 13, 2014
  42. math help plzzz

    Solve the inequality then graph the solution set on real number line. (2/5x)>7 2(x+7)-4>5(x-3)

    asked on May 27, 2014
  43. chemistry

    was the formation of reactants or products favored by the addition of heat?

    asked on February 18, 2014
  44. math

    The perimeter of a fence is 84 meters. If the width is 2 meters less than the length, find the width

    asked on July 19, 2013
  45. statistics

    How is the P-value used to determine whether or not to reject the null hypothesis?

    asked on June 22, 2013
  46. Chemistry

    For the following reaction at a certain temperature: 2( ) 2( ) ( ) 2 H F HF g g g +  it is found that the equilibrium concentrations in a 5.00 L rigid container are [H2]=0.0500 M, [F2]=0.0100 M, and [HF]=0.400 M. If 0.200 mol F2 is added to this

    asked on April 3, 2013
  47. chem

    combination reaction. mg2+o2

    asked on November 17, 2012
  48. English

    Select the sentence in which all pronouns are used correctly. A. I sat between him and her during the sales conference. B. Just between you and I, I am not impressed by our new manager. C. Be sure to divide all income from the suburban property between he

    asked on September 18, 2012
  49. english

    In the following sentence, what is the subject complement? My neighbor is a newspaper reporter.

    asked on September 12, 2012
  50. Chemistry

    At a certain temperature, the Kp for the decomposition of H2S is 0.832 H2S (g) H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.121 atm in a closed container. what is the total pressure in the container at equilibrium? Please tell me how to

    asked on March 9, 2012
  51. College Physics

    Answer the following questions for a mass that is hanging on a spring and oscillating up and down with simple harmonic motion. Note: the oscillation is small enough that the spring stays stretched beyond its rest length the entire time. Options for each

    asked on February 19, 2012
  52. dove elem

    jill bought a coat for $500 dollars the sale tax rate was 7% . what is the total cost of the coat including sales tax

    asked on October 20, 2011
  53. Chemistry

    how many grams of F are in 335 g of CaF2?

    asked on September 18, 2011
  54. Math

    The Lifetimes of a certain brand of photographic light are normally distributed with the mean of 210 h and a standard deviation of 50 h. What percent of lights will need to be replaced within 233 h? Out of 2000 lights, how many will have a lifetime between

    asked on June 9, 2011
  55. Physics

    Baseball player A bunts the ball by hitting it in such a way that it acquires an initial velocity of 1.3 m/s parallel to the ground. Upon contact with the bat, the ball is 1 m above the ground. Payer B wishes to duplicate this bunt, in so far as he also

    asked on September 20, 2010
  56. Physics

    A hot-air balloon is rising straight up with a speed of 5 m/s. A ballast bag is released from rest relative to the balloon when it is 8.2 m above the ground. How much time elapses before the ballast bag hits the ground? I don't get what equations or what

    asked on September 10, 2010
  57. Health Care Fnancial Accounting

    the local school system asks to submit a proposal to do pre-employment physicalsfor 60 bus drivers. What financial or accounting informaton is needed to submit the proposal? what shall I charge the school system?

    asked on August 19, 2010
  58. Project Management

    How does the project audit differ from the performance measurement control system?

    asked on April 15, 2010
  59. algebra

    state the slope of line given the equation y=2/3x+6

    asked on March 1, 2010
  60. Math

    Find the sum of all n exterior angles of a n-sided convex polygon, where n is any positive integer larger than 3. Show all the working details and reasons. I already know that the total is 360 degrees, but how would I use mathematical proof to figure it

    asked on September 3, 2009
  61. sattistics

    Twenty students randomly assigned to an experimental group receive an instructional program: 30 in a control group do not. After 6 months, both groups are tested on their knowledge. The experimental group has a mean of 38 on the test(with an estimated

    asked on July 18, 2009
  62. math

    1)what equation represents a line that is perpendicular to the line whose equation is -2y=3x+7? 2)if the measures of the angles of a triangle are reprsented by 2x, 3x-15, and 7x+15, is the triangle an acute triangle?

    asked on April 7, 2009
  63. physics 2

    a metallic object is given a positive charge by induction, does the mass change (increase, decrease, same)? what if given a negative charge instead? I think protons has more mass so mass increases and the opposite is true for electrons. Am I right?

    asked on February 3, 2008
  64. algebra

    a new parking lothas spaces for 450 cars. the ratio of spaces for fullsized cars to compact cars is 11 to 4. how many spaces are for full-sized cars? how many spaces for compact cars?

    asked on December 12, 2007
  65. Electrochemistry

    A current of 2.50 A is passed through a solution containing Cu+2 ions for 4.00 hours. Calculate the mass of Cu atoms that form at the cathode. Charge= current*time Convert the charge in coulombs to number of electrons. Since it takes two electrons per Cu+2

    asked on May 17, 2007
  66. Science

    Describe the climate and physical characteristics of that biome and the types of organisms that live within it. Give examples of and describe symbiotic relationships between those organisms. Be sure to include at least one example from each of the

    asked on February 13, 2007
  67. Counseling

    I am in grade 10 doing this subject what work can i qualify doing this subjects Math lit,Geography,Business Studies,Tourism

    asked on January 24, 2020
  68. Social studies

    Which of the following could be a modern-day example of cultural diffusion into the region of Southwest Asia A. requiring strict adherence B. Women pursuing careers outside the home C. wearing the hijab in public D.observing traditional religious practices

    asked on December 2, 2019
  69. Chem

    How many moles of each ion are present, per liter, in a solution that is labeled “0.221 M CaCl2 ”? CaCl2  Ca +2 + 2 Cl-

    asked on June 4, 2019
  70. biology

    Hi, I wonder what are therapeutic antibodies? What are they used for?

    asked on May 17, 2019
  71. Physics: electricity

    A 20g mass with charge q=+8C hangs from a spring of stiffness k=50N/m. If an infinite plane with charge density sigma=+3C/m^2 is placed d=5cm below the masses original position, through what distance does the mass on the spring deflect in meters? Ignore

    asked on February 5, 2019
  72. Physics: electricity

    A \(m=20\,\mathrm{g}\) mass with charge \(q=+8\,\mathrm{\mu C}\) hangs from a spring of stiffness \(k=50\,\mathrm{N/m}\). If an infinite plane with charge density \(\sigma=+3\,\mathrm{\mu C/m^2}\) is placed \(d=5\,\mathrm{cm}\) below the masses original

    asked on February 5, 2019
  73. Psychics

    A drag racing car starting from a standstill can reach a speed of 320 km/h in 6.50s by exerting an average horizontal force of 1.52x10^4 N on the pavement. If friction equals 5.2x10^3 N, what is the mass of the car?

    asked on October 29, 2018
  74. English

    Please kindly help me to correct my english grammar. Dear sir, Good day, I just want to confirm from you if it is true the rampant rumors regarding the company.I just heard from this rumors mostly from company staff that it is already being purchased by

    asked on August 5, 2018
  75. English grammar

    Please correct my english grammar. Dear sir, Good day, I just want to confirm from you if it is true the rampant rumors regarding the company.I just heard from this rumors mostly from company staff that it is already being purchased by other company. I'm

    asked on August 5, 2018
  76. English

    Write a few lines of dialogue between the emotions gratitude and anticipation. Make sure every line matches the emotion.

    asked on May 30, 2018
  77. Socials

    What evidence is there to support John A. Macdonald’s argument that BC would be better off joining the United States if the transcontinental railway was not built?

    asked on May 16, 2018
  78. 7th Grade Math

    What value(s) can x have if x = |7|? Explain.

    asked on September 12, 2017
  79. Math 6th Grade

    Bob is planting in a rectangular container. In the center of the container he places a smaller rectangular tub with mint. The tub is 8 in. by 3 in. He plants flowers around the tub. What is the area of the container planted with flowers? The whole

    asked on May 30, 2017
  80. 6th Grade Math (Please Help It's Getting Late)

    Roger visted a ski and snowboard shop the other day to buy a new snowboard. The store said it was having a sale, today only. 20% off all new 2016 Burton Snowboards. Usually these snowboards cost $300 when they're not on sale. Roger told his friend John

    asked on April 26, 2017
  81. programming

    Design a sub-class of SimpleCalculator called Calculator using psudoecode that contains public methods named multiply(), and divide() and that defines private fields called num1 and num2. Each of the methods accepts two numeric arguments and returns a

    asked on April 9, 2017
  82. programming

    Design a sub-class of SimpleCalculator called Calculator using psudoecode that contains public methods named multiply(), and divide() and that defines private fields called num1 and num2. Each of the methods accepts two numeric arguments and returns a

    asked on April 9, 2017
  83. chemistry

    25cm cubed of 0.250mol per litre of potasium carbonate was nuetralized 12.5cm cubed of ethanoic acid of unknown concentration.determine concentration of the acid

    asked on January 11, 2017
  84. Math

    Write a real world problem for the equation 3+x=8

    asked on January 5, 2017
  85. science

    Why the solution of aluminium sulphate in water is not clear

    asked on January 1, 2017
  86. physics

    experiencing a constant horizontal 1.10 m/s wind, a hot air balloon ascends from the launch site at a constant vertical speed of 2.70 m/s. at a height of 202 m, the balloonist maintains constant altitude for 10.3 s before releasing a small sandbag. how far

    asked on December 8, 2016
  87. Stat & Prob.

    Show that if Cov(X,Y)=0, then the correlation coefficient satisfies p(X+Y, X-Y)=Var(X)-Var(Y)/ Var(X)+Var (Y)

    asked on December 1, 2016
  88. healthcare stats

    You currently lease scanning equipment at a cost of $2,750 per quarter and two copy machines at $150 each per month plus $0.01 per page copied. You estimate you will copy a total of 30,000 pages a year per copier. What will you need to budget annually for

    asked on November 8, 2016
  89. Physics

    Which are in static equilibrium? 1. A box sliding down a ramp. 2. A baseball after being hit. 3. A box sliding along a horizontal surface. 4. A perfectly upright freely spinning top 5. A freely swinging simple pendulum 6. A spinning astronaut floating out

    asked on October 30, 2016

    a 75kg parent and a 22kg child meet at the center of an ice rink. they place their hands together and push hard enough to slide apart. a. is the force experienced by the child more than, less than, or the same force experienced by the parent? I said they

    asked on October 11, 2016
  91. Math

    What is 9 minus 3 decided by 1third plus 1 equals

    asked on May 21, 2016
  92. Biology - Help!

    Based on your knowledge of eukaryotic gene regulation, what series of events would explain the generation of the "pre-activated" state for the full set of B-globin like genes (epsilon, gamma, delta, and beta) in the earliest embryo?

    asked on May 9, 2016
  93. Physics

    Car A travelling at 13 m/s [N] is 190m behind car B which is travelling at 9.0 m/s [N]. At this moment car A starts to accelerate at 6.0 m/s^2 [N] to catch up with car B. After 1.0s, car B also starts to accelerate at 2 m/s^2 [N]. How long will it take car

    asked on January 23, 2016
  94. L/A

    These questions are from the book Rain Reign. Explain Rose's father's childhood. How might his childhood impact his relationship with Rose?

    asked on January 12, 2016
  95. Language Arts

    These questions are from the book Rain Reign. Explain Rose's father's childhood. How might his childhood impact his relationship with Rose?

    asked on January 12, 2016
  96. math


    asked on January 5, 2016
  97. Biology

    List down 20 acids with their property and identify them by saying polar or non polar and acidic charge or basic charge

    asked on January 5, 2016
  98. Algebra I

    You have decided to try and convince your parents to let you get your own cell phone. After finding out that the flat monthly rate for unlimited minutes $35.00, which you can afford, you offer to pay the cost yourself. However, just before you place your

    asked on December 13, 2015
  99. Social Studies (Help!)

    Why did New France stretch so far to the west?

    asked on December 7, 2015
  100. Math

    A flowerbed is 3 3/4 meters long and 2 meters wide. Uncle James wants to build a border around the flowerbed. The width of the border is 1/2 meter. The cost of building the border is $20 per square meter. How much does Uncle James have to pay to have the

    asked on November 16, 2015


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