Popular questions and responses by emily
  1. Chemistry

    Write a balanced net ionic equation (include physical states) for the following reaction: Fe(NO3)3(aq) + LiOH(aq) → LiNO3(aq) + Fe(OH)3(s)

    asked on June 27, 2011
  2. Honors Chemistry

    "How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2? N2 + 3H2 ---> 2NH3 ==> 28 g N2 x (1 mol N2/14.0 g N2) x (2 mol NH3/1 mol N2) x ( 17.0 g NH3/ 1 mol NH3) = 68 g NH3 25 g H2 x ( 1mol H2/2.0 g H2) x (2 mol NH3/3 mol H2) x

    asked on November 8, 2009
  3. science

    A simple model for a person running a 100m race is to assume the sprinter runs with constant acceleration until reaching top speed, and then maintains that speed through the finish line. If a sprinter reaches their top speed of 11.2ms-1 in 2.15s, what will

    asked on September 4, 2012
  4. Math

    A bag contains 6 red marbles, 3 white marbles, and 7 blue marbles. You pick a marble without looking. Find the probability of drawing a white marble. Can someone please explain how I would work this out?

    asked on May 21, 2018
  5. Physics

    Determine the stopping distances for an automobile with an initial speed of 95km/h and human reaction time of 1.0s: (a) for an acceleration a= -5.2m/s^2 (b) for a= -6.7m/s^2

    asked on July 10, 2011
  6. Chemistry

    A sample of argon gas at STP occupies 56.2 liters. Find the number of moles of argon and the mass in the sample

    asked on April 27, 2013
  7. Physics (check)

    A merchant in Katmandu sells you a solid gold 1-kg statue for a very reasonable price. When you get home, you wonder whether or not you got a bargain, so you lower the statue into a measuring cup and measure its volume. What volume will verify that it's

    asked on May 18, 2008
  8. first additional language

    how did youth day came?

    asked on May 19, 2013
  9. Calculus

    A solid is formed by adjoining two hemispheres to the ends of a right circular cylinder. An industrial tank of this shape must have a volume of 1600 cubic feet. The hemispherical ends cost twice as much per square foot of surface area as the sides. Find

    asked on November 3, 2016
  10. Physics

    Starting from rest, a 4.0-kg body reaches a speed of 8.0 m/s in 2.0 s. What is the net force acting on the body?

    asked on January 25, 2012
  11. Math

    Jill said that an angle is made of any two rays. Is she correct? Explain

    asked on April 8, 2015
  12. Calc BC

    Figure out the 35th derivative for xsinx. You have to do a few derivatives by hand to figure our a pattern and then predict the 35th one

    asked on September 11, 2013
  13. Math

    An auditorium has 50 rows of seats. The first row has 20 seats, the second row has 21, the third row has 22 seats, and so on, each row having one more seat than the previous row. How many seats are there all together? a. write 2 different expressions for

    asked on October 29, 2010
  14. Physics

    The brakes of a truck cause it to slow down by applying a retarding force of 8740 N to the truck over a distance of 1130 m. What is the work done by this force on the truck?

    asked on November 14, 2012
  15. physics

    a 75 kg person escapes from a burning building by jumping from a window 30 m above a catching net. Acceleration due to gravity is 9.81 m/s^2. Assuming air resistance is simply a constant 96 N force on the person during the fall, determine the person's

    asked on October 11, 2011
  16. Math

    Determine the equation of the parabola with roots 2+sqrt(3) and 2-sqrt(3), and passing through the point (2,5).

    asked on August 23, 2010
  17. social studies

    Which of the following is the best example of how many Pacific islands have adapted to a mix of different ethnic groups? A.They have developed national pidgin languages.*** B.They have populations where immigrants make up the majority. C.They practice

    asked on May 28, 2019
  18. physics @ elena

    can you please help me with this one At serve, a tennis player aims to hit the ball horizontally. part a)What minimum speed is required for the ball to clear the 0.90m--high net about 15.0m from the server if the ball is "launched" from a height of 2.50m ?

    asked on April 22, 2012
  19. French

    Is the word 'maths' masculine or feminine?

    asked on September 29, 2008
  20. Math

    Find the missing length. Round to the nearest tenth of necessary. It is a right triangle with side a being 8 ft and side b being 21ft what is the length of the 3rd side? A 441 B 22.5 C 64 D 19.4* Am I right and please explain I am a little confused.

    asked on February 14, 2019
  21. Chemistry

    Consider the following hypothetical aqueous reaction: A (aq)-->B(aq)}. A flask is charged with 0.065 (mole) of A in a total volume of 100.0 (mL}. The following data are collected: Time (min) 0 10 20 30 40 Moles of A .065 .051 .042 .035 .031 Calculate the

    asked on February 9, 2012
  22. Ap Chem

    explain each of the following observations using principles of atomic stucture and/or bonding. a] potassium has a lower first-ionization engergy than lithium. b] the ionic radius of N3- is larger than that of O2-. c] a calcium atom is larger than a zinc

    asked on January 23, 2007
  23. Calc

    A buoy oscillates in simple harmonic motion as waves go by. The buoy moves a total of 3.5 feet from its low point to its high point and it returns to its high point every 10 seconds. What is the equation that describes this motion if it reaches its high

    asked on July 30, 2008
  24. Chem

    The titration of 25.0 mL of an iron(II) solution required 18.0 mL of a 0.265 M solution of dichromate to reach the equivalence point. What is the molarity of the iron(II) solution?

    asked on September 30, 2015
  25. biology

    which of the following statements about enzymes is NOT true? A. enzymes work best at a specified pH B. all enzymes have the same shape as their substrates. C. enzymes are proteins D. the shape of an enzyme allows it to do its job. im pretty sure its A. Am

    asked on May 12, 2017
  26. Chemistry

    What will be the freezing point of a solution made by dissolving 5.25 g of naphthalene (C10H8) in 100.0 g benzene (C6H6?). The normal freezing point of benzene is 5.5°C and K f (benzene) is 5.12°C / m.

    asked on September 4, 2014
  27. Sport

    Why Olympia selected to hold at the ancient Olympic Games?

    asked on November 9, 2011
  28. Science

    Calculate the quantity of energy required to change 3.00 mol of liquid water to steam at 100°C. The molar heat of vaporization of water is 40.6 kj/mol

    asked on March 25, 2013
  29. Physics

    According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Assume the speed quoted is that of the end of the rod. What is the centripetal

    asked on January 13, 2013
  30. art/history

    which of the following is not an element of baroque or rococo architecture a movement b columns c ornamentation d minimalism

    asked on November 16, 2016
  31. English grammar

    In the following sentence identify the function of the infinitive (phrase). Is it too expensive to travel to Europe? My list of answers contains: Adverb, subject, direct object, adjective, object of preposition, and predicate noun. I chose predicate noun.

    asked on July 21, 2015
  32. Calc

    A baseball is thrown upwards from a height of 2 meters with an initial velocity of 10 meters per second. Use the fact that -9.8 meters per second squared is constant acceleration due to gravity to answer the following: The maximum height of the ball The

    asked on November 1, 2016
  33. English

    Can someone help me with this? Thank you! Prompt A: Compare and contrast the topics and themes of writers from the Americas and European writers. Include specific examples to support your statements.

    asked on December 4, 2014
  34. chemistry

    addition of a strong acid would increase the solubility of which of the following salts AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl

    asked on March 13, 2011
  35. English

    According to the speaker in "Mending Wall" by Robert Frost, why does the neighbor feel that good walls make good neighbors? A. They create a barrier from having to talk to one another often. B. They maintain privacy and prevent meddling. C. They physically

    asked on January 26, 2017
  36. Chemistry

    net ionic equation of Na2CO3+2HC2H3O2-->CO2+h2o+2Na2H3O2

    asked on September 1, 2010
  37. Geometry probability

    Betty picks 4 random marbles from a bowl containing 3 white, 4 yellow, and 5 blue marbles. The probability that exactly 1 of the 4 marbles drawn is blue is _____ (I know that the probability is 5/12 and that simplifies to 0.4166 but that is not one of the

    asked on January 24, 2017
  38. Physics

    This is how the problem starts out: A meter stick is placed with the fulcrum at the 50-cm mark. If a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system? I thought that since

    asked on December 6, 2007
  39. Sport please help me i have a test 2morrow

    What are the reasons for the olympic games to be largest of all sporting events?

    asked on November 9, 2011
  40. chemistry

    A major component of gasoline is octane C8H18. When octane is burned in air, it chemically reacts with oxygen gas O2 to produce carbon dioxide CO2 and water H2O. What mass of octane is consumed by the reaction of 8.8g of oxygen gas? Round your answer to 2

    asked on August 9, 2016
  41. chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate

    asked on February 16, 2010
  42. College Math - Quantitative Reasoning

    Hello, I could really use some help with this problem. If the national economy shrank at an annual rate of 7​% per year for three consecutive​ years, then the economy shrank by 21​% over the three​-year period. - Of course, I understand 7% would be

    asked on January 16, 2017
  43. Life sciences, Business studies,Maths lit and CAT

    With Life sciences, Business studies,Maths lit and CAT, what can I study after matric? Which career field should I follow?

    asked on May 21, 2014
  44. math

    Find all the values of x in the interval [0,2π] that satisfy the equation: 8sin(2x)=8cos(x)

    asked on September 13, 2012
  45. Physics

    A baseball player uses a pitching machine to help him improve his batting average. He places the 43.4 kg machine on a frozen pond. The machine fires a 0.0546 kg baseball horizontally at a speed of 44.8 m/s. What is the magnitude of the recoil velocity of

    asked on December 2, 2012
  46. chemistry

    If I use 0.524g of Mg to react with 60.0mL of 1.0M H+. The density of H+ is 1.00 g/mL, and the specific heat capacity equals what water's is. The Final and Initial temp. are 65.8 and 22. Mg(s) + 2H+(aq) ----> Mg2+(aq) + H2(g) so to find the deltaH of this

    asked on March 22, 2011
  47. Reading Skills

    This question is based on the following information about The Call of the Wild, a book by Jack London. The Call of the Wild is a story about a dog named Buck. Buck is a pampered dog who lives with a wealthy family in southern California. During the Gold

    asked on April 2, 2014
  48. Animal Farm

    According to Benjamin, what is the one unalterable law? How does his idea compare to actual conditions in the Soviet Union today? --------------------------------------------------------------------------------------- This is the passage this question is

    asked on December 7, 2008
  49. Trig

    A carousel with a 50-foot diameter makes 4 revolutions per minute. a) Find the angular speed of the carousel in radians per minute. b) Find the linear speed in feet per minute of the platform rim of the carousel.

    asked on April 1, 2012
  50. Physics

    The place kicker on a football team kicks a ball from ground level with an initial speed of 8.30 m/s at an angle of 19.0° above the horizontal. How long is the ball in the air before it lands on the ground again? You may neglect air resistance.

    asked on February 26, 2017
  51. Math

    Find the speed of a point on the rim of a 24cm diameter fly wheel which is turning at 2800 revolutions per minute. Give your answer in meters per second.

    asked on March 20, 2013
  52. Physics

    Two rugby players are running towards each other. They are 37 m apart. If one is accelerating from rest at 0.5 m/s^2 and the other was already moving at 3.1 m/s and maintains her speed, a)how long before they crunch together? b)How fast was the

    asked on October 2, 2010
  53. Physics

    We study the three point charges shown in the figure. They are held at the corners of an equilateral triangle with ℓ = 0.9 m. What is the electric potential energy of the system of three point charges? Use for the three charges q1 = +2Q, q2 = −3Q, and

    asked on February 7, 2016
  54. physics

    A crate sits on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the

    asked on June 3, 2015
  55. algebra

    Your school wants to take out an ad in the paper congratulating the basketball team on a successful season, as shown to the right. The area of the photo will be half the area of the entire ad. What is the value of​ x? length 5 in width 4 in

    asked on April 4, 2019
  56. Math grade 12

    A lighthouse with a rotating beam is located 500m south of a coastal cliff that runs west to east a) determine a relation for the distance from the lighthouse to the point the light strikes the cliff in terms of the angle of rotation x b) determine an

    asked on November 5, 2015
  57. American Government

    As the country has grown and evolved, so too has the Executive Office of the President and the independent agencies. Give FOUR specific examples demonstrating how the evolution of the executive branch has mirrored the evolution of the nation. Include at

    asked on March 18, 2017
  58. Math

    Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (-5,1) each vertex of the rectangle is located at a point that has

    asked on March 26, 2016
  59. calculus

    I needed help with these FRQ in my APCalc course. Any help or walkthrough would be extremely helpful - thanks in advance. Let f be the function given by f(x)=3ln((x^2)+2)-2x with the domain [-2,4]. (a) Find the coordinate of each relative maximum point and

    asked on December 1, 2014
  60. Science

    Study the scenario. An object is at rest. At five seconds, someone comes over and pushes the object with a force of 3 N to the right. Which of the following choices describes the force needed to keep the object in static equilibrium? a. A force of 3 N to

    asked on September 12, 2018
  61. chemistry

    A 1.00L sample of a gas has a mass of 1.92g at STP. What is the molar mass of the gas? (This is a question on my chemistry worksheet, and I can't find the answer in my book.)

    asked on March 4, 2008
  62. physics

    Piston 1 has a diameter of 0.643 cm. Piston 2 has a diameter of 4.59 cm. In the absence of friction, determine the force required on piston 1 necessary to support an object, m, with weight 1151 N. (Neglect the height difference between the bottom of the

    asked on October 27, 2012
  63. Physics

    Why is Young's experiment more effective with slits than with the pinholes he first used?

    asked on March 22, 2008
  64. physics

    A metal can containing condensed mushroom soup has a mass of 269 g, a height of 14.7 cm, and a diameter of 6.79 cm. It is placed at rest on its side at the top of a 3.34 m long incline that is at an angle of 22.4o to the horizontal and is then released to

    asked on November 3, 2009
  65. physics

    A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure. The length of the arc ABC is 214 m, and the car completes the turn in 40.0 s (Figure shows coordinate plane with point A on -y axis point C on

    asked on March 6, 2012
  66. Physics 1

    An astronaut in her space suit has a total mass of m1 = 76.9 kg, including suit and oxygen tank. Her tether line loses its attachment to her spacecraft while she's on a spacewalk. Initially at rest with respect to her spacecraft, she throws her oxygen tank

    asked on March 14, 2013
  67. Math

    Given any right triangle with an acute angle theta, a) Explain why csc theta is always greater than or equal to 1 b) Explain why cos theta is always less than or equal to 1

    asked on October 8, 2010
  68. Physics

    A partly-full paint can has 0.83 U.S. gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 12 m2), how thick is the layer of wet paint? Give your answer

    asked on September 14, 2012
  69. Math

    A stained glass window has an area of 900 square inches. A. Once a window design is made of rectangular pieces that are 5 inches by 3 inches. How many stained glass pieces are used in the window? B. Another window design is made of square stained glass

    asked on April 23, 2018
  70. English

    Compare Lines 586-87 with those spoken by Satan in Book I: "The mind is its own place, and in itself Can make a Heav'n of Hell, a Hell of Heav'n."

    asked on April 23, 2017
  71. poem by E.E. Cummings

    Can someone help me figure out what the meaning of this poem is? It's called "in Just-" and it confuses me. in Just- spring when the world is mud- luscious the little lame balloonman whistles far and wee and eddieandbill come running from marbles and

    asked on January 21, 2008
  72. physics

    Two speakers are wired to emit identical sounds in unison. The wavelength in air of the sounds is 6 m. Do the sounds interfere constructively or destructively at a point 10 m from both speakers? 1. Destructively 2. Neither 3. Constructively

    asked on April 21, 2013
  73. physics!

    In a scene in an action movie, a stuntman jumps from the top of one building to the top of another building 4.0m away. After a running start, he leaps at an angle of 15 degrees with respect to the flat foor while traveling at a speed of 5.0 m/s. will he

    asked on December 9, 2008
  74. Chemistry

    What is the molality of a solution of water and KCl if the boiling point of the solution is 103.07°C? (K subscript b equals 0.512 degrees C/m solution; KCl is an ionic compound right parenthesis A: .300 B: .600 C: 3.00 D: 6.00 I'm really confused as to

    asked on February 10, 2017
  75. chemistry

    The formation constant* of [M(CN)4]2– is 7.70 × 1016, where M is a generic metal. A 0.170-mole quantity of M(NO3)2 is added to a liter of 1.040 M NaCN solution. What is the concentration of M2 ions at equilibrium?

    asked on March 25, 2016
  76. Math

    Determine the 10th term of the sequence 3, 10, 28, 72, 176... State the general term.

    asked on November 15, 2010
  77. math

    Amanda puts 2 rectangles together to form a new rectangle. both rectangles have a height of 3 inches. the base of one rectangle is 2 inches. the base of the other is 4 inches. if Amanda puts 10 of each rectangle together , end to end, what will be the

    asked on May 22, 2014
  78. chemistry

    51.59 g of water at 82.6 oC is added to a calorimeter that contains 48.01 g of water at 40.9 oC. If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.

    asked on March 26, 2012
  79. Math (geometry)

    A diagonal of one cube is 2 cm. A diagonal of another cube is 4*sqrt3 cm. The larger cube has volume 64 cubic cm. Find the volume of the smaller cube. --------------------------------------------------------------------------------------------------- There

    asked on April 3, 2008
  80. Physics (Tension and Springs)

    An archer must exert a force of 375 newtons on the bowstring so that the string makes a 35 degree angle with the vertical. a)find the tension in the bowstring b)if the applied force is replaced by a stretched spring, and the spring is stretched 30 cm from

    asked on March 16, 2015
  81. Calculus

    Find the slope and y-intercept of the line through the point (6,2) that cuts off the least area from the first quadrant.

    asked on November 26, 2017
  82. Medical Reimbursement

    Dr. M is receiving reimbursement based on actual charges after the patient has been treated. She's being reimbursed on a A. retrospective, fee-for-service payment system. B. prospective payment system. C. indemnity system. D. usual, customary, and

    asked on May 2, 2014
  83. English

    I have a question its which diagram correctly represents this sentence? Sara, José, and Kenny were studying together for the test. How can I post a link to show you the diagrams?

    asked on October 13, 2014
  84. Math

    Use the related acute angle to state an equivalent expression: a) tan 110 degrees b)sin 350 degrees

    asked on December 4, 2010
  85. Trig

    A 7.25 inch circular saw blade rotates at 5200 revolutions per minute. a) Find the angular speed of the saw blade in radians per minute. b) Find the linear speed in feet per minute of one of the 24 cutting teeth as they contact the wood being cut.

    asked on April 1, 2012
  86. Math

    C:\Users\Owner\Pictures\Graph.png Each square on this graph paper is 1/4 Scale: 1/4 inch = 18 inches What are the actual dimensions of the sofa in inches? a. 90x45 b. 90x36 c. 75x25 d. 80x30

    asked on November 15, 2013
  87. General Chemistry (Chem101)

    A chemist mixes two liquids A and B to form a homogeneous mixture. The densities of the liquids are 2.0514 g/mL for A and 2.6678 g/mL for B. When she drops a small object into the mixture, she finds that the object becomes suspended in the liquid; that is,

    asked on September 20, 2012
  88. Physics

    A 80.0 N box of is pulled 20.0 m up a 30.0 Degree ramp by a force of 115 N, if the coefficient of kinetic friction between the box and the ramp is .22 what is the box's kinetic energy?

    asked on February 14, 2012
  89. Reading Skills

    This question is based on the following four sentences. 1. Netta and Jim argued over their views of free trade. 2. Netta and Jim had different views on free trade. 3. Netta and Jim were sharply split over the issue of free trade. 4. Netta and Jim refused

    asked on April 2, 2014
  90. Chemistry

    Which pair of compounds will form a solution? A) Benzene (C6H6) and Hexane (C6H14) B) Na2SO4 and Benzene C) NaCl and Hexane

    asked on April 20, 2012
  91. chemistry

    aluminum metal is added to a solution of cobalt (II) sulfate

    asked on December 3, 2018
  92. Chemistry

    How many milliliters of .100 M HNO3 are needed to neutralize 58.5 mL of .0100 Al(0H)3?

    asked on February 17, 2012
  93. Language arts

    1. reflect on the feedback you received from WriteToLearn about your autobiographical Narrative. (4 points) Which traits are strongest in your autobiographical narrative: ideas, organization, voice, word, choice, sentence fluency, or conversations? Provide

    asked on September 25, 2018
  94. ap chem

    consider the molecules PF3 and PF5. b]is the PF3 molecule polar or is it nonpolar. explain C] on the basis of bonding principles, predict whether each of the following compounds exists. In each case explain your prediction. (i) NF5 (ii) AsF5 2. explain why

    asked on January 23, 2007
  95. World History

    How are religion and culture connected in Ancient India and China? Please help, I'm so stuck on this!!

    asked on October 17, 2017
  96. Chem

    There are two stable isotopes of Gallium Their masses are 68.92558 and 70.9247050 AMU. If the average atomic mass of gallium is 69.7231, what is the natural abundance of the lighter isotope? I don't know where to start!

    asked on September 20, 2012
  97. math

    Find the surface area of the cylinder to the nearest whole number. The figure is not drawn to scale. 13 in on top, 14 in around/

    asked on April 29, 2015
  98. Math

    A company predicts that this years sales will be equivalent to 144% of last years sales. Which value represents 144%? A. 14.4 B. 1 11/25 C. 1.56 D. 14 4/5

    asked on April 9, 2015
  99. Physics

    A 63-kg ice-skater glides with a speed of 10 m/s toward a 14-kg sled at rest on the ice. The ice-skater reaches the sled and holds on to it. The ice-skater and the sled then continue sliding in the same direction in which the ice-skater was originally

    asked on March 22, 2016
  100. Social studies

    The late 1400's through the early 1600's was a time of exploration and early settlement of several European colonies. Each European country had different reasons for their exploration and settlement, but all encountered Native Americans during their

    asked on January 25, 2019


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