Popular questions and responses by Shay
  1. chemistry

    Write the formulas of the compound Al+3 formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

    asked on September 27, 2012
  2. chemistry

    For each of the following bonds, indicate the positive end with \delta^{+} and the negative end with \delta^{-}. Write an arrow to show the dipole for each. 1. Si-Cl 2. Se-F 3. Br-F 4. N-H 5. N-P

    asked on September 29, 2012
  3. chemistry

    What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two

    asked on October 5, 2012
  4. Geometry

    Write a rule in function notation to describe the transformation that is a reflection across the y-axis. A. Rx-0(X,Y) B. Ry-0(X,Y) C. Ry-x(X,Y) D. Rx--1(X,Y)

    asked on March 27, 2014
  5. Algebra

    Graph the line whose x-intercept is -8 and whose y-intercept is -7

    asked on April 22, 2011
  6. chemistry

    Write the formulas of the compound NH4+ formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

    asked on September 27, 2012
  7. chemistry

    When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced. Express your answer as a nuclear equation.

    asked on September 26, 2012
  8. chemistry

    The half-life for the radioactive decay of calcium-47 is 4.5 days.If a sample has an activity of 4.00uCi after 13.5 days, what was the initial activity of the sample?

    asked on September 26, 2012
  9. chemistry

    Radon-222 undergoes alpha decay.what is the nuclear equation

    asked on September 26, 2012
  10. physics

    What is the kinetic energy of a 20 kg dog that is running at a speed of 7.3 m/s (about 16 mi/h)?

    asked on January 27, 2011
  11. everglades

    Polygon ABCD is reflected and dilated to give polygon PQRS. The coordinates of the preimage are (2, 2), (6, 8), (12, 8), and (16, 2). The coordinates of the image are (11, 15), (9, 12), (6, 12), and (4, 15). What is the scale factor of the dilation? 0.25

    asked on April 15, 2015
  12. chemistry

    is IBr a hydrogen bonding or dipole-dipole interactions or dispersion forces

    asked on September 28, 2012
  13. LA Check please

    which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

    asked on January 30, 2015
  14. chemistry

    How much in $ is one MOLE of pennies?

    asked on October 9, 2012
  15. Physics

    Please check my answers: The voltage across a 10-ohm resistor carrying 3 amps must be? I got 30 volts-v=?, I=3 amps, R= 16 ohm. v= 30 amps * 10 ohm=30 volts A 4-ohm resistor is connected in parallel with a 6 ohm resistor. What is the total resistance of

    asked on October 24, 2007
  16. Chem Electron Config

    S2- Cu+ Sn2+ O2- A 1s22s22p63s23p63d10 B. 2s2 C. 1s22s22p63s23p4 D. 1s22s22p63s23p63d104s1 E. 1s2 F. 1s22s22p63s23p64s23d104p65s24d10 G. 1s22s22p63s23p64s23d104p64d105s25p2 H. 1s22s22p4 I. 1s22s22p6 J. none of the above Choose from the list the correct

    asked on October 18, 2012
  17. chemistry

    Write the formulas of the compound Al3+ formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

    asked on September 27, 2012
  18. Language arts

    how does Squeaky feel about taking care of Raymond? A) She complains about it. B) It makes her feel important. C) She ignores him. D) She feels protective of him.***

    asked on March 7, 2019
  19. physics

    Car A is travelling at 22.0 m/s and car B at 29.0 m/s. Car A is 300 m behind Car B when the drive of car A accelerates his car with an acceleration of2.4 m/s2. How long does it take Car A to overtake Car B?

    asked on June 27, 2015
  20. math

    A raffle has a $500 first prize, two $100 second prizes and five $25 third prizes. If 500 tickets are sold for $5 each find the expected value of buying a single ticket.

    asked on July 10, 2011
  21. Technology

    Which of the following is one way to assess whether or not a learning game is effective? A.Being able to win the game B.Doing the quiz before and after the game to see what you have learned.*** C.Making it difficult to win the game D.Simulating winning

    asked on March 6, 2019
  22. Economics

    The accompanying table shows a car manufacturer’s total cost of producing cars: Qty |TC| Variable Costs| Avg. Var. Costs| Avg. Total Costs| Avg. Fixed Costs 0 |$500,000| ---- | ---- | ---- |---- | 1 |540,000 | 2 |560,000 | 3 |570,000 | 4 |590,000 | 5

    asked on May 25, 2011
  23. algebra

    P=b+2s Solve for s

    asked on April 21, 2011
  24. Pre calculus

    Find cos theta and cot theta if sin =1/4 and tan theta

    asked on September 8, 2019
  25. math

    Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What is the probability of picking an N? 8/1 7/1 1/8 1/7

    asked on March 5, 2019
  26. geometry

    In triangle GHJ, GH=32, HJ=63, and m

    asked on March 27, 2014
  27. Math

    Consider the congruence 6x=15(mod 21). How many solutions does the congruence have? What are all the solutions?

    asked on August 2, 2012
  28. Math

    Each exterior angle of a regular polygon is 15 degrees. How many sides does the polygon have? and What is the sum of the interior angles? Since this is not my area of expertise, I searched Google under the key words "polygon angles" to get these possible

    asked on April 4, 2007
  29. math

    simplify the following expressions involving complex numbers. (3+2i)-(-7-i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?

    asked on January 18, 2007
  30. Chemistry

    A rectangular solid of unknown density is 6cm long, 3cm high, and 7cm wide. The mass of this solid is 250g. Calculate the density.

    asked on September 11, 2016
  31. Social Studies

    Compare and contrast the climates of the mainland and the islands of Southeast Asia

    asked on May 18, 2015
  32. language arts

    The italicized words make up which type of verbal phrase? Turning the corner, Kate bumped into David. A. Split infinitive B. Gerund C. Infinitive D. Participial

    asked on December 23, 2013
  33. solid mensuration

    What is the area of a section bounded by a closed elliptical figure whose major and minor segments measure 60 m and 40 m, respectively?

    asked on August 19, 2013
  34. physics

    If the water had lost 12000 joules and the calorimeter gained 1300 joules as the temperature of both rock and calorimeter increased from 22°C to 73°C and the mass of rock in the calorimeter was 185 grams, what is the specific heat, c, of the rock

    asked on April 1, 2013
  35. pre- algebra 1

    Jose has 9 more comic books than Robin.Robin has 5 more comic books than Lee. If jose has 23 comic books,how many comic books dose Robin have? How many comic books dose Lee have?

    asked on November 17, 2012
  36. Chemistry

    which sign of chemical reaction is not detectable by sight?

    asked on October 3, 2012
  37. chemistry

    what is the lewis dot structure for BN

    asked on October 2, 2012
  38. chemistry

    Write the formulas of the compounds formed Pb+4 with the following anions:OH-, NO3- , CO3(2-), HSO4- , PO4{3-} . Use the given order of anions.

    asked on October 2, 2012
  39. physics

    The tops of the towers of the golden gate bridge in san Francisco, are 227m above the water. suppose a worker drops a 655g wrench from the top of a tower. if the average force of air resistance is 2.20 percent of the force of free fall what will the

    asked on February 7, 2011
  40. world geography

    how did deng's four modernizations program greatly increase china's farm production

    asked on April 19, 2010
  41. algebra

    A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. you have to equate h to 6: h = 6 ----> 5t^2+10t+2

    asked on January 18, 2007
  42. Math

    A plane is flying with an airspeed of 190 miles per hour and heading 140°. The wind currents are running at 25 miles per hour at 165° clockwise from due north. Use vectors to find the true course and ground speed of the plane. (Round your answers to the

    asked on March 2, 2020
  43. Chemistry

    The following solutions are combined in a calorimeter to determine the enthalpy of the neutralization reaction. 100.0 mL sodium hydroxide, NaOH, of unknown concentration an excess of 1.3732 M hydrochloric acid, HCl. The experimental value for q is

    asked on January 25, 2020
  44. Chemistry

    Consider the neutralization between the following two solutions: 100.0 mL 0.9285 M hydrochloric acid, HCl 150.0 mL 1.8269 M sodium hydroxide, NaOH How many moles of water are produced by this neutralization?

    asked on January 25, 2020
  45. Physics

    A state trooper’s car sends out a radar signal at a frequency of 14 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

    asked on April 14, 2019
  46. English

    Why does Squeaky not know at first who has won the race in "Raymonds Run"? A. Raymond has climbed a fence*** B. The may pole gets in the way C. The finish is very close D. Mr. Person speaks to softly

    asked on March 7, 2019
  47. math 107

    Suppose you want to have $600,000 for retirement in 35 years. Your account earns 7% interest. a) How much would you need to deposit in the account each month? $ b) How much interest will you earn?

    asked on May 1, 2017
  48. math

    your cellphone plan costs $24.99 per month plus $0.11 for each text message you send or receive. you have at most $28 to spend on your cellphone bill. what is the maximum number of text messages that you can send or receive next month

    asked on February 27, 2017
  49. math

    You are buying balloons for a pary. A small balloon cost $2. A large balloon cost $5. Write an algebraic expression for the cost of x small balloons and y large balloons. What is the answer?

    asked on November 2, 2015
  50. science

    What can happen to an animal species if it cannot adapt to changes taking place in its habitat?

    asked on May 19, 2015
  51. Algebra

    Question Part Points Find the monthly payment for the loan. (Round your answer to the nearest cent.) A $118,000 home bought with a 20% down payment and the balance financed for 30 years at 10.5%

    asked on December 21, 2014
  52. Chemistry

    Po-210 Ia an alpha emitter with a half-life of 138 days. how many grams of Po-210 remain after 552 days if the sample initially contained 5.80g of Po-210?

    asked on October 20, 2014
  53. Math/209

    Dimensions of a Box A box is made from a rectangular piece of metal with length 50 inches and width 40 inches by cutting out square corners of length x and folding up the sides. (a) Write an expression that gives the surface area of the inside of the box.

    asked on March 12, 2013
  54. pre-algebra

    Use algebra tiles to find the difference. Let one white tile equal +1and one black tile equal -1.6-(-9) Thanks

    asked on November 17, 2012
  55. chemistry

    What is the complete ionic equation for the double displacement reaction: CuNO3(aq) + K2S(aq)= what is the chemical name and formula of this chemical reaction? plsss. need help

    asked on October 3, 2012
  56. chemistry

    decomposition of water to form elemental Hydrogen and Oxygen gas. What will be the balanced chemical equation, type of reaction and the driving force of the reaction?

    asked on October 3, 2012
  57. chemistry

    If the boron nitride molecule,BN, were to form, what would its structure look like? pls. need help

    asked on September 28, 2012
  58. chemistry

    Write the formulas of the compound Pb+4 formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

    asked on September 27, 2012
  59. chemistry

    Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 {\rm hr} and is a pure gamma emitter. Suppose that 280{\rm mg} were prepared in the technetium generator this morning. How many milligrams would remain after the

    asked on September 26, 2012
  60. math, trig

    Graph one period of the following function. Show all work . y=2sinx+2cosx

    asked on April 18, 2012
  61. Math

    Find how much money there will be in the account after the given number of years. Principle $8500 Rate 4% Coumpounded quarterly Time 4 yeats A=8500(1+.04/4)raised to 40th power A=8500(1.01)raised to 40th power I am stuck here, how do you raise to the 40th

    asked on August 27, 2011
  62. science

    Is it possible to titrate folic acid?

    asked on October 9, 2008
  63. Science

    How does elevation affect speed of an object

    asked on September 18, 2008
  64. Geometry

    Fibonacci sequnce has this pattern: 1,1,2,3,5,8,13,21,34,55,...... each number is achieved by adding the previous number to the current number (1+1=2, 2+1=3, 3+2=5,....) List the first eight terms of the sequence formed by finding the differences of

    asked on August 25, 2008
  65. physics

    Can a convex lens be used to magnify an image, "shrink" an image, or both? Explain.

    asked on April 16, 2008
  66. Algebra

    The size of the beaver population at a national park increases at the rate of 5.1% per year. If the size of the current population is 151, find how many beavers there should be in 4 years. Use the function f(x)=151e^0.051t and round to the nearest whole

    asked on October 25, 2007
  67. conjectures

    I'm finishing my math 20 Pure. This is my last 20 course then i have 30's. Also I have to work a full time job so that I can live on my own with my boy. So it is tough but I'm doing alright. What about you? wow, okay i have no idea what all that is but

    asked on February 25, 2007
  68. conjectures

    Evaluate the following sums: 1 1+8 1+8+27 1+8+27+64 Add two more line to the list, and make a conjecture about the sums you obtained. this is a pattern. if you look closely than you'll see each number is a product of another number cubed.

    asked on February 25, 2007
  69. algebra, please help.

    Maurice drove 400 km from Edmonton to Battleford in 1 hour less time than it took Martin to drive the same route from Battleford to Edmonton. If Maurice drove 20 km/h faster than Martin, at what speed did each of them drive? Show a complete algebraic

    asked on February 12, 2007
  70. math

    A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=-5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help.

    asked on January 18, 2007
  71. Chemistry

    What are the values of q, w, ΔU, ΔH, ΔS, ΔSsurr, and ΔSuniv for the following constant pressure process for a system containing 0.956 moles of CH3OH ? CH3OH(g, 122.0 ºC, 1.00 atm) ⟶ CH3OH(l, 34.0 ºC, 1.00 atm) Assume that CH3OH(g) behaves as an

    asked on February 2, 2020
  72. chemistry

    One mole of O2(g) undergoes the following change in state. O2(g, 299 K, 4.38 bar) ⟶ O2(g, 252 K, 6.79 bar) What is ΔS for the gas? Assume ideal gas behaviour. The constant pressure molar heat capacity for O2(g) is Cp,m = 29.10 J K−1 mol−1.

    asked on February 2, 2020
  73. chemistry

    A sample of gas is compressed from 12.93 L to 3.83 L using a constant external pressure of 4.89 atm. At the same time, 1,957 J of heat flows into the surroundings. What is the internal energy change for the gas?

    asked on February 1, 2020
  74. chemistry

    What is w when 3.93 kg of H2O(l), initially at 25.0 ºC, is converted into water vapour at 157 ºC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL.

    asked on February 1, 2020
  75. Social studies

    What were some influences on self-government? Select all that apply. ~Commentaries on the laws of England ~ The Columbian bill of rights ~English bill of rights ~ Poor Richards almanac

    asked on September 4, 2019
  76. statistics

    a line of regression y =-1.240 +7.07x is the best fit line for a set of data comparing airfare with 30 days notice and one-day notice. find the best-predicted cost of a ticket purchased one day in advance given that the cost of the ticket is $300 if

    asked on March 15, 2019
  77. math

    find the volume of the cylinder. use 3.14 for pi the top is 34 and the bottom is 27

    asked on February 21, 2019
  78. math

    Sara needs to cover the top and sides of the cylinder below. 8 12 about how many square inches of paper will Sara need? 352 402 804 1005

    asked on February 21, 2019
  79. Managerial finance

    Your company contemplates buying a computer based inventory management system for 200 000. It will depreciated on a straight line basis to zero over its 4 year life span, when it will be sold for 30 000. the system will save the firm 60 000 pre-tax (EBIT)

    asked on August 7, 2018
  80. math 107

    You deposit $4000 each year into an account earning 6% interest compounded annually. How much will you have in the account in 30 years?

    asked on May 1, 2017
  81. Algebra

    Can somebody please help me with solving this and show steps if they can. Solve the equation. Check for extraneous solutions. 9|9-8X|=2X+3 For my answer I got X=-1 I divided by 9 on both sides I got 8X=2X-6 Then I divided by 6 on both sides and got X=-1

    asked on November 16, 2016
  82. Maths

    There are Number cards ”3”、”4”、”5” with 10 cards each ,choose any 8 cards to sum up to 31,then what is the maximum number of cards “3” in the combination?

    asked on November 11, 2016
  83. 3rd grade Math

    Allie was making a cookie recipe that called for 30 chocolate chips. She wants to make 2 batches of cookies. How many chocolate chips does she need? 1 group = 30 30+30=60 or 2x30=60 ?

    asked on October 30, 2016
  84. Algebra

    If x pounds of cashews valued at $6.00 per pound are to be mixed with y pounds of peanuts valued at $4.00 per pound to obtain a 40 pound cashew-peanut mixture. Find x and y so that when the mix is sold for $4.75 per pound, the same amount of revenue is

    asked on October 13, 2016
  85. Organic chemistry

    An unknown compound (x) melts at 60°C and is mixed with a compound (y) that melts at 45°C and is soluble in x. Will the Melting point for the mixture start below 45°? I think so, because if you look at ice and salt for an example, salt has a way higher

    asked on September 21, 2016
  86. pysical science

    An automobile with a mass of 1258 kg accelerates at a rate of 5 m/s² in the forward direction. What is the net force acting on the automobile?

    asked on May 11, 2016
  87. Chemistry

    At 700 k the equilibrium constant Kc for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7*10^6. The rate constant for the reverse reaction at this temperature is 0.54 M^(-1)s^(-1). What is the value of the rate constant for the forward reaction

    asked on March 12, 2016
  88. math

    Dan has walked 1/3 of the way to school. What fraction describes how far he still has to go? Is it 1/4,1/2,2/3,3/1

    asked on March 8, 2016
  89. Math

    Ms. Williams has 3 liters of lemonade. She wants to divide the lemonade into eight portions to give her 8 grandchildren. How can she divide the lemonade into eight equal portions

    asked on December 15, 2015
  90. algebra2

    Use the four functions below for this question: f(x) g(x) h(x) j(x) Jesse got $5 from his dad and he makes $2 each time he walks the neighbor's dog. x g(x) –2 –1 2 –9 6 –17 j(x) = 2x – 5 Compare and contrast these four functions using complete

    asked on November 1, 2015
  91. science

    How would the ecosystem’s carrying capacity for a species change, if the species cannot adapt to changes of habitat?

    asked on May 19, 2015
  92. Science

    are animal species just any kind of animals.

    asked on May 15, 2015
  93. Social Studies

    Beginning in the 1600s, the Tokugawa shoguns who ruled Japan tried to maintain stability and order by A. increasing trade with Europeans. B. conquering nearby countries to creat barriers to invasion. C. developing a new style of writing that was not

    asked on April 21, 2015
  94. math

    A rectangular piece of construction paper is 11 inches long and 8 inches wide. How could it be cut to make a rectangle that has an area of 32 square inches?

    asked on April 7, 2015
  95. Psychology

    Within each Gene element of DNA are arranged in a particular proteins, this code effect every aspect of the body from structure to chemical and keeps it running process describes what?

    asked on March 17, 2015
  96. math proportions

    At a certain time of the day, a 5 foot 1 inch woman casts a 3 foot 4 inch shadow. How tall is a nearby tree that casts a 12 foot 10 inch shadow at the same time of day? Answer in feet and inches. Do not round until the final answer. Then round to the

    asked on February 26, 2015

    What should be observed during titration? My answer: We observe the change in color and change in turbidity of the sol'n. Am I right? Please add more things to be observed during titration. THANK YOU!

    asked on February 23, 2015

    Cite three methods of analysis of a substance from a given sple by titrimetric method of analysis. My answer is: -direct method -indirect method -back titration method Is it right??

    asked on February 23, 2015
  99. physics

    Joel is walking down a street and sees a 115 ft tall building in front of him. He stops 190 feet from the base of the building at the tip of the building's shadow. Round answers to three decimal places.

    asked on February 22, 2015
  100. algebra 2

    Robert loves to dive . he joined the diving team . the diving board is feet above the water . if he jumps off the diving board as high as he can ( 10ft/s ) .how high above the water does he get ? and how long is he in mid air before he hits the water ?

    asked on January 27, 2015


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