1. Chemistry 11th

    Solid ammonium nitrate breaks down into nitrogen, water vapor, and oxygen. If there was 300g of the solid and the reaction happened under STP find the total volume of the products. (translating words to eqns., balancing eqns., understanding what STP means)

    asked by Reyna on June 2, 2010
  2. Chemistry

    Magnesium can be used as a “getter” in evacuated enclosures to react with the last traces of oxygen. (the magnesium is usually heated by passing an electric current through a wire or ribbon of the metal) If an enclosures of 0.452L has a partial

    asked by Ricky on January 22, 2018
  3. trigonometry

    A ship at A is to sail to C, 56km north and 258km east of A. After sailing N25°10’E for 120mi to P, the ship is headed toward C. Find the distance of P from C and the required course to mean C.

    asked by anonymous on January 10, 2013
  4. Chemistry

    If 1.0L of spilled 1M HCl needed to be neutralized using solid sodium carbonate, how many grams of solid would be required? a)53g b)106g c)1060g d)530g

    asked by Kelsey on November 4, 2010
  5. Grammar

    Insert Punctuation as required. 1. After a Maylard incision was made through the abdomen a retractor was used for visualization of the pelvic contents. Answer: comma after abdomen.

    asked by Leslie on May 10, 2011
  6. Physics

    An advertisement claims that a centrifuge can produce a radial acceleration of 3,524g at 4,608 rev/min. Calculate the required radius of the centrifuge.

    asked by Charlie on April 6, 2008
  7. trigonometry

    A ship at A is to sail to C, 56km north and 258km east of A. After sailing N25°10’E for 120mi to P, the ship is headed toward C. Find the distance of P from C and the required course to mean C.

    asked by John on January 6, 2013
  8. College Chemistry

    how many grams of metallic copper are required to react with the number of moles of Cu2+ , 0.16mol, to form CuCl overall reaction can be taken as: Cu2+(aq) + 2 Cl- (aq) + Cu(s)-->2CuCl(s)

    asked by Maggie on October 7, 2010
  9. Social Studies

    Officials whose jobs are not provided for in the constitution but are required by law are known as____ a constitutional officers b secretaries of state c deputies-**** d statutory officers

    asked by bopper on February 8, 2016
  10. Social Studies

    Officials whose jobs are not provided for in the constitution but are required by law are known as____ a constitutional officers b secretaries of state-*** c deputies d statutory officers

    asked by bopper on February 8, 2016
  11. physics

    A 783 kg car travels along US 321. What net force is required to keep the car traveling at a constant speed of 28.8 mph around a curve whose radius is 26.4 m?

    asked by Alex on November 20, 2009
  12. Chemistry

    What is the specific heat of a substance if 2100 J is required to raise a 312 g sample by 15 degrees Celsius? So I use the q = mcΔT formula 2100J = (312 g)c(85 °C - 15 °C) I'm not sure if I did it right.

    asked by Katherina Ramos on May 20, 2014
  13. english

    IS this a good thesis? School uniforms should not be required, because they discourage individualism, do not teach students to make responsible decisions, and this would only cause students to become rebellious.

    asked by antonio on July 21, 2014
  14. chemistry

    a 30.0ml sample of diprotic acid is titrated with .260M KOH. if 68.5ml is required to reach the equivalence point, what is the concentration of the acid?

    asked by john on October 12, 2011
  15. physics

    A 110 kg object moves in a horizontal straight line with an initial speed of 54 m/s. If it is stopped along that line with a deceleration of 1.90 m/s2 what magnitude of force is required?

    asked by John on October 9, 2012
  16. physics

    A 110 kg object moves in a horizontal straight line with an initial speed of 54 m/s. If it is stopped along that line with a deceleration of 1.90 m/s2 what magnitude of force is required?

    asked by John on October 9, 2012
  17. Physics

    A sled is set in motion on a frozen lake. If friction and air resistance are neglible, how much force is required to keep the sled moving at a velocity of 12 m/s?

    asked by TS on October 9, 2012
  18. Physics

    A stone is thrown vertically upward with a speed of 18.0 m/s. (a)How fast is it moving when it reaches a height of 11.0 m? (b)How long is required to reach this height ? (c)Why are there two answers to (b)?

    asked by Anonymous on August 2, 2014
  19. Physical Science

    Hello, Can you tell me if I have the correct answer? Thank You How much heat is required to convert 0.3 kilogram of ice at 0 degrees celsius to water at the same temperature? My answer: 100,375 J

    asked by Mandi on February 8, 2008
  20. math

    Suppose that you must order concrete for a sidewalk that is to be 58 ft by 3 ft to a depth of 6 in. How much concrete is required? (Answer to the nearest 1/2 cubic yard.) my answe is 11.5 and is wrong.ugh

    asked by Debin on December 4, 2012
  21. Physics

    A ball traveling with an initial momentum of 2.5 kg*m/s bounces off a wall and comes back in the opposite direction with a momentum of -2.5 kg*m/s. What impulse would be required to produce this change?

    asked by Amanda on March 10, 2014
  22. Chemistry

    I'm really confused about how to do these two problems. Please help me. What is the amount of heat (kJ) required if 64.0 kg of H2O is heated from 25°C to 85°C? 200.0 g Al (C = 0.900 J/g × °C) at 95°C is added to 85.4 g H2O at 25°C. What is the final

    asked by Leah on September 25, 2014
  23. Physic

    A winch drags a 200 kg crate along a 15 degrees incline at 0.2 m/s. The coefficient of kinetic friction is 0.22. What is the power required as the crate moves up the slope?

    asked by Naniso on November 5, 2015
  24. Physics

    An experiment requires sound intensity 0.942 W/m2 at the distance of 2.7 m in any direction from a speaker. What total sound power is required? Answer in units of W.

    asked by Aj on October 21, 2012
  25. Social studies

    Officials whose jobs are not provided for in the constitution but are required by law are known as_____. A. constitutional officers B. secretaries of state C. deputies D statutory officials Not sure?

    asked by Amber on January 28, 2016
  26. physics

    a rope attached to a sledge make an angle of 40% with the ground calculate the tension in rope required to produce a horizontal component of 100N

    asked by precious on October 7, 2018
  27. trigonometry

    A ship at A is to sail to C, 56km north and 258km east of A. After sailing N25°10’E for 120mi to P, the ship is headed toward C. Find the distance of P from C and the required course to mean C.

    asked by John on January 6, 2013
  28. Pharmacy Calculations

    Amoxicillin suspension 125mg/5ml give ¾ tsp PO bid Disp: 10 day supply 5. How much suspension is required to fill this prescription?

    asked by Jenise on July 22, 2014
  29. Chemistry

    If 22.15 milliliters of 0.100 molarity sulfuric acid is required to neutralize 10.0 milliliters of lithium hydroxide solution, what is the molar concentration of the base?

    asked by Kaela on November 28, 2012
  30. Chemistry

    How much heat, in kilojoules (kJ), is required to raise the temperature of 2.50kg Hg(l) from -20.0 to -6.0C? Assume a density of 13.6g/ml and a molar heat capacity of 28.0 J mol -1 C -1 for Hg(l). Please helpppppp .... thanks in advance

    asked by Bob on October 21, 2013
  31. science

    prove that the maximum horizontal range is 4 times the maximum height attained by a projectile which is fired long the required oblique direction

    asked by nt52 on June 28, 2012
  32. Physics

    A box with a mass of 5 kg is lifted (at constant velocity) to a height of 3 m to place it on the shelf of a closet. How much work was required to lift the box to this position?

    asked by Alex on February 11, 2011
  33. math

    Describe the sequence and types of transformations required to transform the graph of y=x^3 into the graph of y=2f{-2(x-1)}+4. Give the equation of new transformed function with detailed explanation.

    asked by Anonymous on February 3, 2013
  34. Chemisty

    A total of 31.3 ml of 0.15 N NaOH was required to reach a phenolphthalein endpoint in titrating 6.00 g of vinegar. Calculate the number of equivalents of acetic acid in vinegar.

    asked by Eliazbeth on February 21, 2012
  35. Physical Science

    A rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 380,000 km?

    asked by Julie on March 6, 2010
  36. statistics

    What sample size is required from a very large population to estimate a population proportion within 0.05 with 95% confidence? Don't assume any particular value for p. A. 271 B. 38 C. 385 D. 767

    asked by dean on June 19, 2013
  37. math

    One thousand dollars is deposited in a savings account at 6% interest compounded continously. How many years are required for the balance in the account to reach $2500

    asked by lana on June 23, 2009
  38. physics

    A 3.5 kg mass sits at rest on a rough surface. The surface has the following coefficients of friction: µs = 0.53 and µk = 0.21. Determine the required force to start the object moving?

    asked by Bolke on December 2, 2011
  39. Chemistry

    N2 (g) + 3 CL2 (g) ---> 2 NCL3 (g) delta H = + 230 kj ----- a) What mass of N2 would absorb 96.5 kj of heat as it reacts? b) What volume of Cl2 at STP would be required to react with the N2 in part (a)?

    asked by Soba on June 4, 2008
  40. Chemistry

    Suppose that 12.41 mL of 0.169 M NaOH(aq) was required to titrate 0.1579 g of an unknown acid (HX). What is the molar mass of the acid? Answer in units of g/mol.

    asked by Andrea on May 29, 2016
  41. Chemistryy

    what mass of silver nitrate (AgNO3) is required to prepare 400 grams of a 3.50% solution of AgNO3? Options: 1. 0.00875 g 2. 114.28 g 3. 1400 g 4. 14 g

    asked by alexandra on July 13, 2010
  42. physics

    A car traveling 59 km/h accelerates at the rate of 8 m/s2. How many seconds are required for the car to reach a speed of 90 km/h? ENTER NUMBERS ONLY (ONE DECIMAL PLACE). NO UNITS

    asked by prabh on February 1, 2011
  43. logic and programing

    1.An algorithm and a flowchart is required to obtain the average weight of a group of N-students. It should read and show each student’s name, age and weight in kilograms.

    asked by guralap on June 19, 2016
  44. Physics

    If 32s is required for an object to reach maximum height, what will be the time for an object to come back to its initial position? is it 32sec or -32 sec since it's traveling downwards???

    asked by Anonymous 22 on December 8, 2016
  45. Chemistry

    A 0.2861 gram sample of an unknown acid (HX) required 32.63 mL of 0.1045 M NaOH for neutralization to a phenolphthalein endpoint. What is the molar mass of the acid?

    asked by Jake on February 19, 2009
  46. home inspection

    Based on standards of practice guidelines, which of the following home components is normally required to be inspected? A. Awnings C. Storm window B. Storm door D. Balconies

    asked by kyle on December 4, 2013
  47. Physics

    A sustained force of 44 N moves a model airplane 10 m along its runway to provide the required speed for takeoff. Find the kinetic energy at takeoff.

    asked by Genesis on September 20, 2015
  48. maths

    find the number of bricks, each measuring 25 cm x 16 cm x 10 cm required to construct a wall 24 m long, 6 m high and 0.4 m thick. the mortar occupies (1/10)th of the volume of the wall

    asked by leena on February 25, 2013
  49. College Algebra

    Find the time required for an investment of 5000 dollars to grow to 7900 dollars at an interest rate of 7.5% per year, compounded quarterly

    asked by Marina on September 25, 2015
  50. Math

    How many 300mg clindamycin capsules are required to compound a prescription as follows "clindamycin 3%, propylene glycol 5%, isopropyl alcohol qs ad 360mL"? (again just need help to set this problem up)

    asked by Rayne on September 28, 2015
  51. physical

    a rocket moves through outer space at 11,000 m/s at this rate how much time would be required to travel the distance from earth to moon which is 380,000 km

    asked by cindy on January 28, 2012
  52. Physics

    How man joules are required to increase the temperature of 1 kg of granite by 1000K using 790 joule/kilogram-kelvin as the specific heat of granite.

    asked by John on March 28, 2010
  53. lab

    A total of 31.3 ml of 0.15 N NaOH was required to reach a phenolphthalein endpoint in titrating 6.00 g of vinegar. Calculate the number of equivalents of acetic acid in vinegar.

    asked by Eliazbeth on February 21, 2012
  54. Physical Science

    a rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 381,000 km?

    asked by Dana on September 15, 2013
  55. physics

    2.) A horizontal force of 100 N is required to push a piece of furnisher across a floor at a constant velocity. (a.) What is the net force acting on the furniture?

    asked by Anonymous on August 19, 2010
  56. physics

    A force of 0.053 N is required to move a charge of 36 µ a distance of 30 cm in a uniform electric field. What is the size of the electric potential difference between the two points?

    asked by tyler on January 13, 2012
  57. chemistry

    titration of 50ml of 0.25ammonia with 0.5M HCL . a) find the initial PH value b) volume of HCL is required to reach the equivalent poinnt c)the ph at the equivalence point

    asked by anne on November 29, 2014
  58. english grammar

    Are the Quotations correct and is a comma required after Heart? “Have you ever read the story "’The Tell-Tale Heart’" by Edgar Allan Poe?” Dave asked.

    asked by cayeman on May 28, 2009
  59. Chemistry

    What volume of 0.200 M K2C2O4 is required to completely react with 30.0 mL of 0.100 M Fe(NO3)3? 2Fe(NO3)3 + 3K2C2O4 --> Fe2(C2O4)3 + 6KNO3

    asked by Anonymous on May 7, 2017
  60. CHEMISTRY

    If 4.32 g of solid C reacts stoichiometrically according to the balanced equation, how many grams of solid TiO2 are required? 3TiO2(s) + 4C(s) + 6Cl2(g) → 3TiCl4(l) + 2CO2(g) + 2CO(g)

    asked by Anonymous on February 25, 2010
  61. physics

    A 550 N crate rests on the floor. How much work in joules is required to move it at constant speed 7.0 m along the floor, against a friction force of 150 N?

    asked by kassy on October 18, 2016
  62. math

    Describe the sequence and types of transformations required to transform the graph of y=x^3 into the graph of y=2f{-2(x-1)}+4. Give the equation of the new transformed function with detailed explanation.

    asked by Anonymous on January 25, 2013
  63. Chwmistry

    how much in calories is required to raise the temperature of 415 grams of chloroform from 21.4 degrees c? The specific heat of chloroform is 0.23 cal/g°c. How many joules does this equal?

    asked by Alvaro on January 5, 2015
  64. physics

    A horizontal force of 50 N is required to pull an 8 kg block of aluminum at a uniform velocity across a horizontal wooden desk. What is the coefficient of kinetic friction?

    asked by roem on May 17, 2015
  65. Chemistry

    The molar heat of fusion for water is 6.009 kJ/mol. How much energy would be required to melt 15.11 mol ice? Answer in units of kJ. Thanks in advance!

    asked by Radio Active Wear on April 23, 2015
  66. Chemistry

    In a routine laboratory analysis, a solution of sodium chromate with a chromium concentration of 175.0 ppm is required. Calculate the molarity of this solution.

    asked by Jessica on November 25, 2014
  67. Chemistry

    The standard molar heat of vaporization for water is 40.79 kJ/mol. How much energy would be required to vaporize 8.51 ×1010 molecules of water? Answer in units of kJ. Thanks for the help!!!

    asked by Radio Active Wear on April 23, 2015
  68. chemistry

    calculating the molarity of acetic acid in a vinegar sample given that 5.00 of vinegar required 43.50 mL of 0.1050 M NaOH to just reach the methyl red endpoint.

    asked by Pam on April 24, 2013
  69. Scientific studies

    A stone is thrown vertically upward with a speed of (a) How fast is it moving when it reaches a height of 11.0 m? (b) How long is required to reach this height? (c) Why are there two answers to (b)?

    asked by Aly on February 17, 2010
  70. AP CHEM

    You need to use KH2PO4 and K2HPO4 to prepare a buffer with a pH of 7.45. Which of the following ratios of [base]/[acid] is required? For phosphoric acid, (H3PO4), Ka2 = 6.2 × 10–8. Do I use the Hasselbach equation?

    asked by Jenny on March 24, 2016
  71. Physics

    How much heat is required to convert 175 g of ice at -2°C to water at 2°C? I have no idea how to solve this. Nothing I've found in the book or on-line is helping. Can someone point me to how to solve? Thank you

    asked by Anna on July 7, 2016
  72. physics

    A horizontal force of 5.0 N is required to move a body of mass 3.0 kg with uniform velocity along a horizontal floor. Find the coefficient of kinetic friction.

    asked by Ange on November 17, 2011
  73. chemistry

    Do 65 grams of oxygen and 44 grams of carbon contain equal number of atoms? Calculate the number of atoms?

    asked by twynna on February 8, 2011
  74. Chemistry

    How many moles of carbonate ions, aluminum ions, and oxygen atoms are present in 39.0 g aluminum carbonate?

    asked by Kaitlyn on February 9, 2016
  75. chemistry

    sodium chloride+water+ethanol+oxygen+carbon dioxide+water+sodium chloride=

    asked by towela on February 18, 2011
  76. chemistry

    If we have a mixture of 0.33 moles of oxygen and 0.22 moles of carbon dioxide, the mole fraction of carbon dioxide is .

    asked by Anonymous on November 24, 2015
  77. chemistry

    A commercial sample of concentrated aqueous nitric acid (HNO3) is 18.2% nitric acid base mass and has a density of 1.12 g/mL. (a) What is the molarity (M) of the HNO3 solution? (b) What is the molality (m) of the HNO3 solution? -------- I know that.... (a)

    asked by Sarah on January 22, 2009
  78. chemistry

    Using the following equation 2C2H2 + 5O2 -> 4CO2 + 2H2O what volume of oxygen would be needed to react with 89.6L of C2H2 at a temp of 273 and a pressure of 101.3 kpa. I can't seem to figure out my first step. Using PV=NRT should I do initial and final

    asked by danielle on February 3, 2016
  79. SCIENCE

    WHY CAN'T HUMANS LIVE ON VENUS? Too hot, no oxygen and very high atmospheric pressure. But this doesn't mean that we could live there, it only means that we can't walk on the surface without protection. Thank you for using the Jiskha Homework Help Forum.

    asked by I NEED HELP QUICKLY!!! PLEASE HELP ME on June 5, 2007
  80. Genera Chemistry

    Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please

    asked by Kendra on May 26, 2010
  81. General Chemistry

    Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please

    asked by Kendra on May 24, 2010
  82. health

    Which one of these statements is true regarding blood circulation? A. For health and survival, it's critical for blood circulation to be ongoing and uninterrupted. B. Normally, blood circulates in a repeating stop-start rhythm. C. The heart deoxygenates

    asked by AK on July 28, 2008
  83. Biology - oxidative phosphorylation

    Some things I don't understand: If oxygen accepts electrons from the electron transport chain, how does it become a molecule of water? ie where does the hydrogen come from? In chemiosmosis, protons are pumped against their concentration gradient across the

    asked by JJ on April 23, 2008
  84. Chemistry

    1. How do intermolecular forces differ in different alcohols? 2. Why does oxaloacetic acid has a higher Ka than succinic acid? a. fewer carboxyl groups b. a less polar structure c. addtional functional groups that make it more soluble in water d. fewer

    asked by anonymous on May 14, 2009
  85. chemistry

    Match the correct mole ratio to the substances in the reactions below. carbon monoxide to iron in the reaction: Fe2O3 + CO ==> Fe + CO2 water to manganeese(II) chloride in the reaction: HCl + MnO2 ==> H2O + MnCl2 + Cl2 sodium to oxygen in the reaction: Na

    asked by joshua on February 29, 2008
  86. Law

    Assume state of Kansas passes a law requiring all inline skates sold in Kansas to have disc brakes. Assume that there are no federal regulations covering inline skate design. Assume also, that the required disc brakes would make inline skates earier to

    asked by Shekhar on April 12, 2007
  87. Chemistry

    The odor of pineapple is due to the compound ethyl butyrate, which contains hydrogen, carbon, and oxygen. When 3.70g of ethyl butyrate are burned, 8.41g of carbon dioxide and 3.43g of water are the only products. Determine the empirical formula of ethyl

    asked by Steward on December 9, 2010
  88. Chemistry

    The odor of pineapple is due to the compound ethyl butyrate, which contains hydrogen, carbon, and oxygen. When 3.70g of ethyl butyrate are burned, 8.41g of carbon dioxide and 3.43g of water are the only products. Determine the empirical formula of ethyl

    asked by Steward on December 9, 2010
  89. english paragraph 8 - 12 sentences long

    Your favorite cousin has moved to your town and is looking for a job. Her previous experiences are working as a cashier and sales clerk at two department stores. You know she plans to apply at similar stores in your town. But you also know she is a perfect

    asked by kay on March 26, 2012
  90. English

    I am writing an argument essay on school uniforms and I need some help writing the introduction. I am arguing in favor of school uniforms.. My thesis is ..School uniforms should be required in all public schools because not only do they cut down on the

    asked by Kayla on October 20, 2010
  91. MATH

    I am stuck in this question. "amortization payments" What amortization payments would be required every 6 months, at 14% interest, to off a $35,000 loan within 4 yrs. Since u are good at explaining, please do so. What is the periodic payment required to

    asked by Haydee on August 31, 2006
  92. chemistry

    lets just say that 5g of solid benzoic acid burns under gaseous oxygen atmoshphere. Temperature increases from 20c to 50c. So is this exothermic so the sign is negative? how is it not the same as 2 mol of solid iron (C = 25.1 J/(mol K)) is heated from 20C

    asked by eng on March 10, 2010
  93. Honors Chemistry

    I have to fill in the blanks of these questions with the elements H (hydrogen), Co (cobalt), Ga (gallium), and O (oxygen), but different sources are telling me different things: 7. Its most common oxidation state is -2 8. A metal with more than one

    asked by Emily (different from one before me) on September 28, 2009
  94. Management

    The Helping Hands League does not have a lot of money to spend on technology. The league wants to keep records on each client and volunteer for tax purposes and have the ability to create schedules for volunteers to ensure the needs of each client are

    asked by Sweetpea on June 2, 2007
  95. maths

    whats 3.05 litres to millilitres Isn't there 1000 milliliters in each liter? 305 milliliters Are you sure? The original question was: "whats 3.05 litres to millilitres" BobP's response was: "Isn't there 1000 milliliters in each liter?" (This is correct.)

    asked by danielle on August 27, 2006
  96. finance

    Here are data on $1,000 par value bonds issued by Microsoft, Ford, and Xerox at the end of 2008. Assume you are thinking about buying these bonds as of January 2009. Answer the following questions: a.) Calculate the values of the bonds if your required

    asked by Yatie on August 29, 2015
  97. chemistry

    A mixture of Ar and N2 gases has a density of 1.361 g/L at STP. What is the mole fraction of each gas? not sure on really where to start Work this as the classic mixture: the mass of 22.4 liters of the gas is 1.361*22.4 grams. molmassargon*Far +

    asked by UTramos on June 19, 2006
  98. chemistry

    Both aluminum and zinc are used in "air batteries", those that use oxygen from the air as an oxidizing agent. These reactions take place in one type or the other: 4Al(s) + 3O2(g) --> 2Al2O3(s) 2Zn(s) + O2(g) --> 2ZnO(s) a) Calculate DeltaG^o for these

    asked by Anonymous on May 1, 2010
  99. Economics

    Use the concepts of marginal cost and marginal revenue to derive an optimal capital budget for Company X, which has identified 7 possible investment projects and determined its cost of capital as shown below. Table A: Alternative Projects, Required

    asked by Damian on April 8, 2013
  100. science

    When substances such as sugar and table salt are dissolved in water, the freezing points of the new solutions are lower than the freezing point of water. Also, the more material dissolved, the lower the freezing point. The boiling points of these

    asked by kayci on May 12, 2010