1. algebra 2

    The capacity of the gas tank in a car is 16.5 gallons. The car uses 10.5 gallons to travel 178.5 miles. After driving 85 more miles, only 1 gallon of gasoline remains in the tank. Which linear equation and graph model the amount of gas g left in the tank

    asked by me on July 7, 2013
  2. physics

    You are hired to check the technical validity of a futuristic space mystery production. The scene takes place during the rst manned trip to Pluto's moon, Charon. Sally Skywalker is outside the spaceship repairing some hardware, when her safety line to the

    asked by Sandhya on October 27, 2008
  3. pschology

    Plaes help me with this I need it as soon as possible... Thanks 1.Choose one of the disorders listed below: •Tourette’s Syndrome •Oppositional Defiant Disorder •Conduct Disorder •Anxiety Disorder •Bipolar Disorder You can choose one for me and

    asked by alex on April 21, 2011
  4. Chemistry

    Nitroglycerin, C3H5(NO3)3, a solid explosive compound, decomposes to carbon dioxide, water vapor, nitrogen, and oxygen. (a) Calculate the total volume of gases when collected at 1.2 atm and 25 degrees Celsius from 2.6*10^2 g of nitroglycerin. (b) What are

    asked by Kid on February 3, 2018
  5. precalculus

    A town has population 700 people at year t=0 . Write a formula for the population, P, in year t if the town: (A) Grows by 45 people per year: P= (D) Shrinks by 12 people per year: P=

    asked by barney on March 13, 2019
  6. math

    A billboard is 4.0 meters by 2.5 meters. A scale diagram of the billboard must fit in a space that is 15 centimeters by 12 centimeters. Write a reasonable scale for the scale diagram.

    asked by Emily on January 14, 2016
  7. Algebra

    Let x equal the age, in human years, for a dog that is 2 years old or older. For each of your chosen breeds, write an expression to model its age in dog years. [Hint: Use (x - 2) in each expression.] These are the dog years: 2yrs: 23 yrs old 3yrs: 27 yrs

    asked by Brooklin on December 22, 2015
  8. math

    Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

    asked by john on January 9, 2010
  9. math/story problem

    Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

    asked by Please on January 9, 2010
  10. Math story problem

    Trains a and b are traveling in the same direction on parallel tracks;Train a is traveling 40mph and train b is traveling 50mph. Train A passes a station at 8:15 am. If train b passes the same station at 8:27 am what time will train b catch up to train a?

    asked by John on January 9, 2010
  11. math

    The cheerleading squad is having a bake sale. They want to bake at least 120 cookies. They made 12 cookies the first hour and 24 cookies the second hour. a)Write an inequality that describes the scenario. Let Variable h represent the number of hours that

    asked by XenaGonzalez on October 18, 2015
  12. Chemistry- Reacting Masses Calculations

    Hi the question asks me to calculate the mass of calcium carbonate that must be decomposed to produce 14kg of calcium oxide. I think I've gone wrong somewhere, do you write 14000g or 14kg etc, could you help? I did: Moles CaO=(Mass CaO/Mr CaO) =1400/56 =25

    asked by Oli on November 2, 2014
  13. Math-probability

    A sporting goods store estmates that 20% of the students at a nearby university ski downhill and 15% ski cross country. Of those who ski downhill, 40% also ski cross country. What percentage of these students ski both down hill and cross country? Write as

    asked by Gina on July 27, 2013
  14. CHEMISTRY

    Write formulas for the compounds that form from Sr and each of the following polyatomic ion: NO3 −1, SO4 −2, PO4 −3. SR (+3 CHARGE) NO3(-1 CHARGE) SO4(-2 CHARGE) PO4(-3 CHARGE) Re posting this question. hopefully someone can help me answer this now.

    asked by MELISSA on June 24, 2016
  15. physics

    write down in terms of the mass m and the velocity v of the body, expressions for i) momentum ii) the kinetic energy use your answer to (b) to help calculate the mass and the velocity of the ball momentum is mass*velocity Kinetic energy is 1/2

    asked by Kim on October 16, 2006
  16. Social Studies

    Are there anythings in which the government plays no role? Since we all should obey the laws and statutes enacted by various governments, everything is affected by government. Perhaps the least affected are newspapers and other media. We have a free press

    asked by Gedeon on September 7, 2006
  17. english

    We swam for two days, and we were tired. please I need this sentence with out a comma splice Is this is correct? We swam for two days and we were tired. Underneath that, write the corrected sentence without the comma splice.

    asked by antonio on July 16, 2014
  18. English Grammar

    e.g. The bar graph below shows the TV viewing habits of Koreans. In this sentence, what is the part of speech of 'below'? Can we write like this?: The bar graph which is below shows the TV viewing habits of Koreans.

    asked by John on November 17, 2007
  19. Math

    Write the statements in symbolic form. Let p: The temperature is 90°. q:The air conditioner is working. r.The apartment is hot. If the apartment is hot and the air conditioner is working, then the temperature is 90°.

    asked by Jen on July 11, 2011
  20. accounting

    Deane Company issues $5 million, 10-year, 9% bonds at 96, with interest payable on July 1 and January 1.The straight-line method is used to amortize bond discount. Prepare the journal entry to record interest expense and bond discount amortization on July

    asked by Jenny on March 29, 2010
  21. Physics

    Two small loudspeakers that are 5.50 apart are emitting sound in phase. From both of them, you hear a singer singing C# (frequency 277 ), while the speed of sound in the room is 340 . Assuming that you are rather far from these speakers, if you start out

    asked by Brian on December 12, 2009
  22. Math calculus 2

    A propane tank is in the shape generated by revolving the region enclosed by the right half of the graph of (4*x^2)+(64*y^2)=144 and the y-axis about the y-axis. If x and y are measured in meters find the depth of the propane in the tank when it is filled

    asked by Anonymous on February 15, 2018
  23. Algebra

    I need help with my daughters homework. I know a little bit of algebra but it has been about 15 years since I have done it. She switched schools recently and there was a learning gap in the schools. The problem is: give the demensions of rectangles with

    asked by Holly on March 21, 2007
  24. Math - Solving for Trig Equations

    Solve the following equation for 0 less than and/or equal to "x" less than and/or equal to 360 -- cos^2x - 1 = sin^2x -- Attempt: cos^2x - 1 - sin^2x = 0 cos^2x - 1 - (1 - cos^2x) = 0 cos^2x - 1 - 1 + cos^2x = 0 2cos^2x - 2 = 0 (2cos^2x/2)= (-2/2) cos^2x =

    asked by Anonymous on November 22, 2007
  25. Science, NATS

    Consider the following chemical reaction. Molecular hydrogen and carbon dioxide react to form water and methane. H2+CO2-->H2O+CH4 A)Explain why this equation is not balanced and what law of nature does it break in its current form? B) Astronauts from the

    asked by David on October 1, 2016
  26. Chemistry

    'A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 x 10^-4) with 0.1 M NaOH. What is the pH after 20.0 mL of the 0.10 M NaOH is added?' I'm a little bit confused but here's my ICE chart (in moles): HF________OH-_____F-

    asked by SarahF275 on February 21, 2018
  27. Math, help

    I need help what formula would i use or what steps do i take? A professor gives a test with 100 true-false questions. If 60 or more correct is necessary to pass, what is the probability that a student will pass by random guessing? The brute force way of

    asked by student on July 13, 2007
  28. chemistry

    write the metal ion complex (predominant one) for the beakers: all four beakers contained .1M Ni(NO3)2 6H20, which was a light teal green to beaker 2, 1mL of 6MNH3 was added, and it turned bright blue to beaker 3 and 4, 1 mL of 30%en was added and they

    asked by sam on February 2, 2009
  29. Chemistry 114

    Write the balanced ionic equations for the following precipitations and complex forming reactions: a) AgNO3 solution + copper sulphate solution b) copper sulphate solution + lead nitrate solution c)CoCl2 solution + conc. HCl d) Zinc chloride solution +

    asked by Chenny on April 12, 2010
  30. Math

    You have $30 to spend on picking 25 pounds of two different types of fruit at a farm. The apples cost $1.40 per pound the blueberries cost $.90 per pound and the cherries cost $1.10 per pound. You want prices many pounds of apples as the other two fruits

    asked by Jude on April 10, 2016
  31. algebra

    I have been working this one for awhile and have become more confused. Please assist. Problem: Find two consecutive odd integers such that 5 times the first interger is 12 more than 3 times the second. The key thing is to realize that odd numbers, just

    asked by ken on April 21, 2007
  32. chemistry

    HELP PLEASE... what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is

    asked by Anonymous on January 11, 2011
  33. chemistry

    HELP PLEASE... what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is

    asked by princess on January 11, 2011
  34. physics

    It takes you 5 hrs to climb the top of a peak. The altitude of the peak is 400m, and you started from your camp that is an altitude of 300m. Estimate your power output during the climb. First i found that you move 1000m in 5 hrs, which would be .0556m/sec.

    asked by Anonymous on October 15, 2007
  35. Chemistry

    The question is what is the molecular equation for acetic acid mixed with ammonia, sulfuric acid mixed with barium hydroxide, copper (II) sulfate mixed with hydrosulfuric acid, and copper (II) acetate mixed with hydrosulfuric acid. I've attempted some but

    asked by Bach on March 16, 2010
  36. Algebra 1B

    A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = -0.04x^2 + 8.3x + 4.3, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters,

    asked by Abby on December 2, 2016
  37. Algebra

    A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = –0.04x2 + 8.3x + 4.3 , where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters,

    asked by Cassie on March 11, 2013
  38. chemistry

    what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is bent c) same with

    asked by princess on January 11, 2011
  39. chemistry

    HELP PLEASE... what is the chemical equation for these situations..? a) there is a straight iron nail in the solidified gelatin solution. the gelatin solution was prepared with phenolphthalein and K3Fe(CN)6. b) same scenario as with (a) but the nail is

    asked by Anonymous on January 11, 2011
  40. Calc

    A 100 inch piece of wire is divided into 2 pieces and each piece is bent into a square. How should this be done in order of minimize the sum of the areas of the 2 squares? a) express the sum of the areas of the squares in terms of the lengths of x and y of

    asked by katie on November 16, 2010
  41. Math

    Hi, how would we solve a problem like this? The path of the ball for many golf shots can be modelled by a quadratic function. The path of a golf ball hit at an agle of about 10 degrees to the horizontal can be modelled by the function : h= -0.002d^2+0.4d

    asked by Mark on May 25, 2007
  42. physics

    According to its design specification, the timer circuit delaying the closing of an elevator door is to have a capacitance of 30.0 µF between two points A and B. (a) When one circuit is being constructed, the inexpensive but durable capacitor installed

    asked by capacitance q on October 15, 2013
  43. Physics

    According to its design specification, the timer circuit delaying the closing of an elevator door is to have a capacitance of 30.0 µF between two points A and B. (a) When one circuit is being constructed, the inexpensive but durable capacitor installed

    asked by bad at physics on October 15, 2013
  44. MATH HELP!

    Help with any of these would be greatly appreciated! THANK YOU! 2. How would i determine the values of 'k' if the graph y=2x^2-2x+3k intersects the x-axis at two distinct points? 3. The path of a basketball can be modeled by the equation h(d)=-0.13d^2+d+2.

    asked by Rachel on July 24, 2008
  45. Math

    An object suspended from a spring is oscillating up and down. The distance from the high point to the low point is 30cm, and the object takes 4s to complete 5cycles. For the first few cycles, the distance feom the mean position, d(t) centimetres, with

    asked by Katlyn on March 25, 2013
  46. SS

    For questions 1-10 choose the letter of the answer that matches the description. Not all letters will be used. A. sectionalism B. Missouri Compromise C. Andrew Jackson D. John C. Calhoun E. Articles of Confederation F. cabinet G. tariff H. treason I.

    asked by . on December 12, 2016
  47. Chemistry

    The specific heat capacity of a metal is given as 0.745 J/ degree Celcius.What mass of the metal must be heated to 95 degree Celcius in order to be used to warm 2.548 L of water from 18.1 degree Celcius to 22.5 degree Celcius ? I'm so confused I don't even

    asked by Carmelo on November 11, 2014
  48. English

    Passage A Avalanches are caused by a variety of conditions. When the temperature is cold and snow falls, the snow sticks to the ground. However, when the air temperature changes, the snow may slide away in pieces or slabs. Basically, an avalanche happens

    asked by Anonymous on December 17, 2018
  49. Hisotry- Arabian/ 1001 Nights?

    1) What is the main purpose for Shahryar and Shahzaman’s journey together? To find someone whose suffering is greater than their own To escape the revolt Shahryar caused by executing most of the single women in his land To rekindle their brotherly love,

    asked by Michael on July 11, 2014
  50. English- Arabian/1001 Nights

    1) What is the main purpose for Shahryar and Shahzaman’s journey together? To find someone whose suffering is greater than their own To escape the revolt Shahryar caused by executing most of the single women in his land To rekindle their brotherly love,

    asked by Michael on July 11, 2014
  51. Chemistry

    Based on the balanced equation 2NBr3 + 3NaOH → N2 + 3NaBr + 3HOBr calculate the number of of excess reagent units remaining when 116 NBr3 molecules and 180 NaOH formula units react? I calculated the excess reagent to be NaOH. So is the units of remaining

    asked by Kyle on January 22, 2012
  52. math

    I have to find the rule of each line can you help? 1.3,3.3,4.5,6.5,7.7,____,_____,_____ Rule:_______________________ 14.8,15,13.2,13.4,11.6,____,____,____ Rule:_______________________ 4.8,9.6,8.9,17.8,17.1,_____,______,_____ Rule:_______________________

    asked by Mark on April 14, 2009
  53. Modern World History

    I have to write an essay on the legacy of the decisions made at the Congress of Vienna. Can you give me some information or links to somewhere that can be helpful to me in my writing. I'm looking for information like 1)what was the Congress? What was it

    asked by Bryan on January 20, 2007
  54. English

    Project 1. Decide the place which you want to introduce to foreigners among the region you live. 2. Paste a picture or photo of the place. 3. draw a rough sketch of the place and write a guideline passage from the nearest station or bus stop. 4. Pretend

    asked by John on October 30, 2008
  55. Geometry (Checking)

    2.) Which is true about both Pappus's Theorem and Desargues' Theorem? Each theorem applies to spherical geometry. Each conclusion states that three points are collinear.

    asked by Jazy on May 28, 2014
  56. English

    1. Part I of "Alone" can best be identified as an example of a (1 point) ballad. sonnet. lyric poem. narrative poem. 2. Which of the following lines from "Alone" best supports the author's epiphany regarding the human condition? (1 point) "...I pulled at

    asked by dea on October 28, 2015
  57. physics

    The mass of the blue puck shown below is 10.0% greater than the mass of the green one. Before colliding, the pucks approach each other with momenta of equal magnitudes and opposite directions, and the green puck has an initial speed of 8.0 m/s. Find the

    asked by mightymouse on March 23, 2009
  58. sciences

    Assume you are starting a new research project from scratch, you are interested in one of the following proteins and want to purify this protein for biochemical characterization. Please choose one of the proteins below and write a one-page research

    asked by princess on September 13, 2016
  59. Algebra

    Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= -8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How

    asked by Annette on March 6, 2017
  60. Physics

    A bath toy is floating stationary in water such that half of the toy is above water and half of the toy is below the water. A kid pulls the toy 3.9 cm down into the water and then lets go. The toy then proceeds to bob up and down. It bobs up and down 26

    asked by Anonymous on January 10, 2015
  61. Algebra I

    Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= -8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How

    asked by Annette on March 6, 2017
  62. Math

    Which equation represents the solution to the following? I have some lemons. Jill has two more limes than five times the number of lemons that I have. Emma has one-third as many limes as Jill. Emma has 4 limes. How many lemons do I have?

    asked by Anonymous on June 26, 2015
  63. algebra

    Can someone help with the equation for this?? Jon has a handful of pizzas. Someone takes 1/2 of them plus 1/2 of one pizza. Someone else comes and takes 1/2 of what's left plus 1/2 a pizza. A third person takes 1/2 of what's left plus 1/2 pizza. All pizzas

    asked by Cammy on September 27, 2012
  64. Math

    Elaine has a customer who needs a box with a volume of 12 cubic inches. The customer want to know what size box is the least expensive to buy. .the price will be based on surface area. the supplier charges 1/2 cent persquare inch. .the dimensions of the

    asked by Neisha on March 3, 2013
  65. Algebra

    What is the property of this equation? -3(x+4)=-3x-12 Distributive Property Associative Property of Addition Associative Property of Multiplication Commutative Property of Addition

    asked by Jim on January 12, 2019
  66. Geography

    How do the scale and intensity of contemporary impacts compare with the impacts of early agriculture and urbanization? Im not even sure what this question is asking, I have read through my text and i dont understand what this question means, however I am

    asked by Sarah M. on August 3, 2018
  67. Spanish

    For spanish I have to write a spanish paragraph that inclues six ar-verbs. And the verbs querer jugar and ir. I can't see to get them down!! HELP! Elena: (Welcome to) GNN. Granville (News network.) Me llamo Elena. Soy (delivering) el (upcoming events) en

    asked by Taylor on March 4, 2008
  68. physics

    (c) A ladder with length L and mass m rests against a wall. Its upper end is a distance h above the ground (Figure 13.3). The center of gravity of the ladder is one-third of the way up the ladder. A fire fighter with mass M climbs halfway up the ladder.

    asked by PURITAE on May 21, 2013
  69. English

    I changed a few things trying to use synonyms. Can you please tell me they are possible? Thank you very, very much! 1) House swapping is a very common way to go on holiday if you can't afford a hotel room. 2) If you want to swap houses with others (better:

    asked by Henry2 on December 19, 2011
  70. math

    What are the steps of the order of operations? Why is it important that you follow the steps rather than solve the problem from left to right? Write an expression for your classmates to simplify using at least three of the operations from the order of

    asked by Sammyg on May 2, 2011
  71. Algebra 1B Radical expressions & data analysis

    1. Simplify 2/√5 A. 2/√5 B. √10 C. √10/5 D. 2√10/5 *** My answer 2. Simplify -11√112 A. -44√7 B. -176 √7 C. -27 √7 D. 4√7 *** My answer 3. Simplify 17√17 -9 √17 A. 8 *** My answer B. 8√17 C. 26√17 D. 8√0 4. Simplify 6/ √3 +

    asked by Mermaid99 on May 23, 2016
  72. chemistry

    Consider the following balanced thermochemical equation for a reaction sometimes used for H2S production: 1/8 S8 (s) + H2 (g) ¨ H2S (g) ƒ¢Hrxn = -20.2 kJ (a)Is this an exothermic or endothermic reaction? (b)What is ƒ¢Hrxn for the reverse reaction?

    asked by patrick on October 13, 2015
  73. Chemistry

    The concentration of Pb+2 in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluable lead(II)carbonate (267.2092 g/mol) according to the

    asked by Cynthia on February 22, 2012
  74. History

    Which of the following best describes the role of women during the civil war? A.They waited at home b.they built railroads to transport food to troops C.they fought alongside men D.they mangaged families,businesses,and hospitals During the war, many

    asked by Help me on February 12, 2015
  75. English

    I have to write a paper on an author and then effectively persuade the audience that this author is an important and influential writer who should be included in the curriculum for a college writing course. I chose Ernest Hemingway. This is my thesis -

    asked by Gabby on March 18, 2014
  76. histroy

    complete a paper on Hinduism. The paper will allow you to focus on the religion’s cultural and societal influences and compare them to its origins. You are also asked to explain the Hindu desire for liberation from earthly existence. We don't write

    asked by Trenet on March 22, 2007
  77. SAT vocab

    Would you say that deprecate, disdain (as a verb), and denounce are synonyms? These I found at Keyword: Thesaurus... an excellent help in checking synonyms and antonyms. I would agree that those are synonyms Synonyms bad-mouth, belittle, cry down,

    asked by Hannah on August 21, 2007
  78. Math

    A stadium has two sections Tickets for section A cost $a each Tickets for Section B cost $b each Johanna paid $105 for 5 section A tickets and 3 section B tickets. Raiyah Paid $63 for 4 section A tickets and 1 section B ticket Write 2 equations in a and b

    asked by Jayda on June 27, 2009
  79. science

    Couple of questions. Why does the earth keep moving? The engine of a rocket applies a continual force to push the rocket along. When the engine stops what will happen? I think the rocket will stop acceleration You need to be aware of the concept of

    asked by Kim on May 8, 2007
  80. Physics

    A 46.5-cm diameter disk rotates with a constant angular acceleration of 2.4 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at this

    asked by Ed on November 28, 2009
  81. math

    Write a rule for the sequence 8, -1, -10, -19... A. Start with 8 and add -9 repeatedly B. star with -9 and add 8 repeatedly c. start with 8 and add 9 repeatedly D. start with 8 and subtract -9 repeatedly

    asked by . . . on March 24, 2015
  82. math

    Alana picked p peaches. Michelle picked 18 times as many peaches as Alana. Write an expression that shows how many peaches Michelle picked.

    asked by karla on May 24, 2017
  83. geometry

    the length of a rectangle is 9 inches. write an expression for the area of the rectangle if the width is w inches. find the area of the rectangle when the width is 1,8,9, and 11 inches.

    asked by alanaR. on August 26, 2010
  84. algebra

    Greta bought 15 chocolates. Jesse bought c times as many chocolates as Greta. Write an expression that shows how many chocolates Jesse bought.

    asked by ddd on February 4, 2015
  85. Calculus

    square root of (12), square root of (12 + square root of (12)), square root of (12+ square root of (12+ square root of (12))) Write a recursion formaula for an(subcription), n greater than or equal to 2.

    asked by Ashley on March 7, 2013
  86. physics question

    Due to electric effects on the earth and in the atmosphere, there is an electric field near the earth's surface that points down. Assuming the electric field is uniform with a magnitude of 150 N/C, what charge would a 145g baseball need to float as though

    asked by anonymous on February 22, 2018
  87. algebra

    of 8 Multiple Choice: Please select the best answer and click "submit." The rule below shows how to find the distance traveled of an object thrown downward with initial velocity of 3 feet per second. Which answer expresses that rule in the form of an

    asked by guerline on February 13, 2012
  88. chemistry

    can anyone help with this problem please..... Potassium chlorate decomposes according to the following equation: 2KClO3 (s) → 2KCl (s) + 3O2 (g). If a 3.00 g sample of KClO3 is decomposed and the oxygen is collected at 24.0 °C and 0.991 atm, what volume

    asked by angel on November 12, 2015
  89. math

    Hi, I have a math question that I need help with: g:-> 3(1.3)^x State equations for any asymptotes to the graph of g. I know what an asymptote is, but I do not understand this question...so lost. Help would be greatly appreciated. Thanks so much I'm a

    asked by christine on September 16, 2006
  90. AP Chemistry

    A 23.9475 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by Rain on September 19, 2017
  91. AP Chemistry i need help!

    A 21.5997 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by Rafael on September 4, 2012
  92. Physics

    The 56 kg man in the roller coaster car is sitting on a bathroom scale. If he is traveling at 40.9 m/s at the point shown and the radius of the vertical coaster track is 87 meters, to the nearest newton what does the scale read? What is the answer to the

    asked by Sara on November 2, 2014
  93. AP chemistry

    A 22.709 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by valerie on September 5, 2012
  94. Chemistry

    A 28.4378 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by Zawng on September 10, 2013
  95. AP Chemistry

    A 28.4858 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s)→MgO(s) + CO2(g).After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by Gabriella on August 30, 2013
  96. AP Chemistry

    A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by Tina on September 13, 2011
  97. Pre-Calculus HELP!!

    The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of hours of daylight t days into the year: f(x)=11+2.2sin(2pi/365)t-1.25).How many hours of daylight are there on the twelfth day of

    asked by Ellie on November 26, 2015
  98. Chemistry2

    WO3 (s) + 3 H2 (g) -> W (s) + 3 H20 (g) Tungsten is obtained commercially by the reduction of WO3 with hydrogen according to the equation above. The following data related to this reaction are available. DeltaH(kilojoules/mole) for WO3 is -839.5. DeltaH

    asked by Jeffery on November 30, 2010
  99. chemistry

    A 21.8603 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g). After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of

    asked by Anonymous on September 9, 2014
  100. Calculus application of sin function

    a horizontal position of the pendulum of a grandfather clock can be modelled by h(t)=Acos(2(pi)t/T), where A is amplitude of the pendulum in meters, t is time in seconds, and T is the period of the pendulum, in seconds. If the pendulum has a velocity of

    asked by Matt on November 25, 2016

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