1. Physics

    A projectile is launched with 200kg m/s of momentum and 1000 J of kinetic energy. What is the mass of the projectile. The answer is said to be 20 kg but I can't get it. I tried this but it didn't work: p=mv=200 m=200/v I plugged that into this equation:

    asked by Marisol on October 23, 2007
  2. physic

    A 57 kg boy and a 42 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.4 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in

    asked by Wendia on September 22, 2010
  3. physics

    a ray of light strikes a rough surface such that the angle of incidence is 40.0. what is the angle of reflection 1. 0 degrees 2. 20.0 degrees 3. 40.0 degrees 4. the angle of reflection cannot be determined. I am confused between 3 and 4 but I think the

    asked by paul on January 9, 2018
  4. science, physics

    A 4 μC point charge is on the x-axis at 1.1 m, and a 3 μC point charge is on the x-axis at 2.7m. Find the magnitude of the net electric field at the point on the y-axis where y = 3.7 m . The value of the Coulomb constant is 8.98755 × 109 N · m2/C2.

    asked by Jami on July 22, 2014
  5. Algebra

    A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

    asked by Casey on April 23, 2013
  6. Calculus

    A ladder 8 meters long is leaning against a wall. If the top of the ladder is slipping down at the rate of 8 meters per second, how fast is the bottom moving away from the wall when it is 7 meters from the wall? Please give your answer in , enter it

    asked by TraiShaun on October 24, 2011
  7. Math

    PLEASE HELP: A bathtub has a capacity of 42 gallons and is completely full of water. Ten gallons of water are drained out. Enter the percentage of gallons of water left in the bathtub. Round your answer to the nearest hundredth.

    asked by jwalkerjess on September 17, 2015
  8. Algebra

    A ranger spots a forest fire while on a 45-meter observation tower. The angle of depression from the tower to the fire is 12 degrees. To the nearest meter, how far is the fire from the base of the tower? IS THE ANSWER 212 meters

    asked by Anna on February 18, 2012
  9. Algebra

    A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

    asked by Casey on April 23, 2013
  10. Finance

    Saturated Meat Corporation preferred stock is currently selling for $22 per share. The preferred dividend is $2.50 per share. If Jennifer requires a return of 10% on the preferred stock, should she invest in this stock? You must empirically support your

    asked by Teresa on January 30, 2011
  11. College Algebra

    The length of a rectangle is 3 times the width . If the perimeter is to be at least 48 meters, what are the possible values for the width? (If the perimeter is at least 48 meters, then it is greater than or equal to 48 meters.) Enter the expression for the

    asked by Nancy on April 18, 2011
  12. Trig

    Use the fundamental identities to simplify the expression: cot beta sec beta I used 1+tan^2u=secu since cot is the inverse of tan. I flipped the tangent, then so it was 1+ (1/tan). But the book's answer is the cosecant of beta. Where did this come from??

    asked by Tara on January 4, 2010
  13. Health

    Body fat is defined as the proportion of fat that is in your body compared to your bone and muscle. True or False My answer is true because to me its the component that refers to the ratio of fat to lean body mass.

    asked by Faye on August 18, 2014
  14. maths

    The enrollment of Kennedy High School dropped from 1200 to 1000 over a three-year period. What the percent of decrease during this time? A. 20 B 16 2/3 C. 25 D. 200 E. 2 My answer is 1200-1000=200 200/1200= 1/6 ( some wrong )

    asked by Tomas on August 15, 2013
  15. Physics

    A 0.48 kg soccer ball approaches a player horizontally with a velocity of 18 m/s to the north. The player strikes the ball and causes it to move in the opposite direction with a velocity of 24 m/s. What impulse was delivered to the ball by the player?

    asked by Michael N. on January 24, 2011
  16. physics

    A 58 kg boy and a 38 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.1 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl. Answer in

    asked by Shareka on September 13, 2013
  17. Chemistry - Thermodynamics

    Which one of the following reactions would you expect to have highest ΔS°? Answer A. C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(g) B. C2H4(g) + 3O2(g) → 2CO2(g) + 2H2O(g) C. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g) D. C2H6(g) + 7/2O2(g) → 2CO2(g) + 3H2O(g)

    asked by Anonymous on April 15, 2012
  18. Precalc

    Find the values of x between (or equal to) 0 and 360 degrees to satisfy each equation. arcsin1/2=x I got 30 degrees as one angle, but how do I find the second one? arccot1=x Is the answer 45 degrees? Also, Find each value: arccos(-1/2) and sin(2 sin^-1

    asked by George on February 13, 2008
  19. Physics

    A 57 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.5 m/s2, determine the magnitude of the acceleration of the boy toward the girl. Answer in

    asked by Jessica on October 14, 2012
  20. Physics

    Can you help me through this one? I don't want just the answer: A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at

    asked by Logan on September 15, 2011
  21. Chemistry(Please check)

    Which of the following four processes are accompanied by an increase in entropy? 1. I2 (s) -> I2 (g) 2. 2 I (g) -> I2 (g) 3. 2 NH3 (g) -> N2 (g) + 3 H2 (g) 4. Pb2+ (aq) + 2 OH – (aq) -> Pb(OH)2 (s) Answers: a. 1 & 2 b. 1 & 3 c. 3 & 4 d. 2 & 4 e. only 3 I

    asked by Hannah on April 23, 2012
  22. Spanish help

    In spanish why are the present-tense verbs for yo complete considered to be stem-changing verbs? 1.Because in some of them, when the e is stressed, it is changed to ie 2.Because in some of them, when the o is stressed, it is changed to we 3. Because in

    asked by Alexander Dennis on September 14, 2014
  23. Biostats

    I am having problems in this course with following the professor. Can anyone help me with this problem Thanks need to calculate 99% CI for true mean with the following data: n=100, mean is 126 with sample variance of 402. I have to know the answer,

    asked by Grace on June 7, 2007
  24. Chemistry

    O.k. I am confused. So here is what I did. Mass of empty flask plus stopper: 37.34g mass of stoppered flask plus water: 63.67g Mass of stoppered flask plus liquid: 52.01g Mass of water: 63.67 - 37.34= 26.33 Volume of Flask(density of H20 at 25*C, 0.9970

    asked by Sara on August 22, 2007
  25. Pork in World Religions

    Which religions ban the eating of pork? What is the reasoning behind each religion's decision not to eat pork? How has this effected the worldwide distribution of pork-related products?

    asked by Chris on May 30, 2007
  26. Microeconomics

    We consider an exchange economy and i have to show in an edgeworth box that an allocation can be individually rational (meaning that no consumer prefers the initial bundle to the bundle obtained in the allocation) and pareto optimal without being a walras

    asked by Ansi on April 12, 2007
  27. statistics

    if the null hypothesis is that the mean is 3218, the alternative hypothesis is that the mean > 3228, and the sample mean is x= 3342, the sample standard deviation is s=287, the sample size is n= 42, and α= 0.01 a. calculate the z test statistic. b. what

    asked by emily on April 29, 2012
  28. science

    a hunter aims his gun and fires a bullet directly at a monkey in a tree. at the instant the bullet leaves the barrel of the gun,the monkey drops. will the bullet hit the monkey .substantiate your answer with proper reasoning.

    asked by jo1 on July 1, 2012
  29. Physics

    A computer hard drive rotates at 5400 revolutions per minute. Starting from rest, what torque will get the hard drive up to that speed in just 150 revolutions? The moment of inertia of the hard drive is 1.3×10^-2 kg·m^2. I know the answer is 2.2 N.m, but

    asked by Devon on December 5, 2014
  30. physics

    The density of liquid carbon dioxide is about 0.8 g/cm^3. What volume fraction inside the fire extinguisher (when full) is occupied by CO2? The density of CO2 gas is negligible compared to the density of liquid CO2. My answer was 75%. Please verify.

    asked by Alice on December 23, 2013
  31. physics

    A 66.5 kg ice skater moving to the right with a velocity of 2.72 m/s throws a 0.104 kg snow- ball to the right with a velocity of 40.3 m/s relative to the ground. What is the velocity of the ice skater after throwing the snowball? Disregard the friction

    asked by Jill on December 5, 2012
  32. Physics

    An 82.9 N box of clothes is pulled 28.2 m up a 20.7◦ ramp by a force of 117 N that points along the ramp. The acceleration of gravity is 9.81 m/s^2. If the coefficient of kinetic friction between the box and ramp is 0.29, calculate the change in the

    asked by Josh on December 10, 2014
  33. math

    points) You arrive home to find that your 55 foot by 20 foot basement has 6 inches of water in it. a) If 1 cubic foot of water is about 7.48 gallons, how much water will you be pumping out of your basement? Express your answer rounded to the nearest tenth

    asked by joie on September 23, 2017
  34. math

    San falls from a conveyor belt at the rate of 10 m^3/min onto the top of a conical pile. The height of the pile is always three-eighths of the base diameter. How fast are (a) height and (b) radius changing when the pile is 4 m height? Answer in cm/min.

    asked by ibranian on August 12, 2012
  35. Physics (URGENT)

    Three wire-wound resistors have the following values: 30 ohms, 80 ohms, and 100 ohms. Each resistor has a voltage rating of 100V. If these three resistors are connected in series, can they be connected to a 240V circuit without damage to the resistors?

    asked by Anonymous on September 24, 2013
  36. physics

    The density of a sample of air is 1.235 kg/m3, and the bulk modulus is 1.42 · 105 N/m2. a) Find the speed of sound in the air sample. b) Find the temperature of the air sample. Give answer in °C. Do not enter unit. Yanlýþ. Denemeler

    asked by Urgent on April 1, 2011
  37. please help

    The Everton college store paid $1859 for an order of 49 calculators. The store paid $11 each for scietific calculators. The others, all graphing calculators, cost the store $55 eaach. How many of each type of calculator ws ordered? Please answer in detail

    asked by Shelly on July 26, 2011
  38. Physics

    The co-efficient for static friction for a 5 kg box on a floor is .72. How much force if required to start the box sliding? I worked it as follows: Force of friction=Force normal * co-effic. of friction which is .72*5*9.8=35.28 but answer in back of my

    asked by CC on March 31, 2009
  39. Math

    Please explain to me how to solve: A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

    asked by Jane on January 25, 2012
  40. Math

    A square, where s is an odd integer, is divided into unit squares. All the unit squares along the edges and the 2 diagonals of a square are discarded. Find a fully simplified expression, in terms of s, for the number of unit squares remaining answer.

    asked by Jamie on July 5, 2016
  41. Geometry

    Jonathan is 3 ft from a lamppost that is 12 ft high. The lamppost and it's shadow form the legs of a right triangle. Jonathan is 6 ft tall and Is standing parallel to the lamppost. How long is Jonathan's shadow? I don't get how the answer is square root

    asked by Anonymous on January 11, 2012
  42. Physics

    An electron is acted upon by a force of 3.50×10−15 N due to an electric field. Find the acceleration this force produces in each case: The electron's speed is 6.00 km/s . =3.84*10^15 The electron's speed is 2.60×108 m/s and the force is parallel to the

    asked by Bob on October 30, 2017
  43. History

    I need HELP on my history homework about Christianity in Rome. The section is "The Missionary Work of Paul": 1. Why did Paul's early life contradict what he ended up doing later in life? I think the answer to 1 might be: In Paul's early life, he explicitly

    asked by Riona on May 14, 2018
  44. Probability.. HELP!

    Three men were walking down a street talking when they met a fourth man. If the fourth man knew that two of the men always lied and the third always told the truth and he asked the three men a question, what is the probability that he got a truthful answer

    asked by KG on November 12, 2014
  45. Chemistry

    What mass of KIO3 is needed to convert the copper in 0.200g of CuSO4.H2O to Cu(IO3)2? my answer is: 0.828g Cu(IO3)2 x (2*214.003 MolarM KIO3/ 413.36 MolarM Cu(IO3) = 0.857g KIO3 could you please check if i got it right

    asked by xavier on July 17, 2013
  46. chemistryyy

    Answer the following two questions about the equivalence point for the titration of 27.8 mL of 0.235 M hypobromous acid (pKa = 8.64) with 0.214 M KOH. 1)Predict if the solution will be acidic, basic or neutral at the equivalence point. 2)Calculate the pH

    asked by Rachel on September 21, 2011
  47. first steps in using a personal computer

    alphonus and larry are discussing start menu commands.alphonus will go to the control panel to see a display of all local and remore drives.larry will go to computer to make changes to some computer settings.who is correct a.neither b.both c.alphonus

    asked by susue on November 13, 2013
  48. physics

    A loaded elevator with very worn cables has a total mass of 2200kg, and the cables can withstand a maximum tension 28 000N a) what would be the maximum upward acceleration for the elevator if the cables are not to break? b) what would be the answer to part

    asked by colleen on August 22, 2009
  49. chemistry

    Which of the following properties is a chemical property of phosphorus? Answer a) it burns in air b) it is a white waxy solid c) it melts to form a viscous liquid at 44.1 oC d) Both a and c are both examples of chemical properties. e) a, b, and c are

    asked by Jack on September 6, 2010
  50. maths

    A water tank has the shape of a rectangular prism of base 50 cm2. This tank is being filled at the rate of 12 liters per minutes. Find the rate at which the height of the water in the water tank increases; express your answer in millimeters per second.

    asked by LARA on February 3, 2014
  51. physics

    An 85.7 N box of clothes is pulled 26.2 m up a 31.7 ◦ ramp by a force of 112 N that points along the ramp. The acceleration of gravity is 9.81 m/s 2 . If the coefficient of kinetic friction between the box and ramp is 0.24, calculate the change in the

    asked by Anonymous on November 29, 2012
  52. chemistryyy

    Answer the following two questions about the equivalence point for the titration of 27.8 mL of 0.235 M hypobromous acid (pKa = 8.64) with 0.214 M KOH. 1)Predict if the solution will be acidic, basic or neutral at the equivalence point. 2)Calculate the pH

    asked by Rachel on September 21, 2011
  53. Math

    A square, where s is an odd integer, is divided into unit squares. All the unit squares along the edges and the 2 diagonals of a square are discarded. Find a fully simplified expression, in terms of s, for the number of unit squares remaining answer.

    asked by Jamie on August 15, 2016
  54. Math

    Please explain to me how to solve: A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

    asked by Jane on January 26, 2012
  55. Math

    From a sample set of 10 colored balls--5 green, 3 red and 2 yellow-- 5 are chosen at random WITH replacement. What is the probability that the result will be: green, red, yellow, red, green? Write your answer as a four place decimal number. p(G,R,Y,R,G)

    asked by Jazz on March 13, 2016
  56. chemistry

    A sample of Nitrogen(N2)& Helium has a volume of 250mL @ 30degrees celsius & a total pressure of 745 mmHg a)If the pressure is 32mmHg what is the partial pressure of the Nitrogen? b) What is the volume of the Nitrogen at STP? Did not understand previous

    asked by Connie on March 24, 2011
  57. Math differentiation

    1. y = x^x 2. y = (sin^2xtan^4x)/(x^2+1)^2 3. y = x^(1/x) 4. y = 2^(-x^3) Okay, so I'm pretty sure 1 is done easily: ln y = ln (x^x) ln y = x ln x d/dx ln y = d/dx x ln x y'(1/y) = x(1/x) + ln x(1) = 1 + ln x y'(1/y) = ln x + 1 y' y(1/y) = (ln x + 1)y y' =

    asked by Marissa on August 27, 2008
  58. english

    I have to make this sentence nonracist and nonagist can you help? 1. She is a very capable black woman. here is my answer: She is a very capable African American. 2. It's hard to believe that a woman her ago could accomplish so much. I think it is correct

    asked by jessica on August 23, 2006
  59. COM 220

    in what ways are full sentence outlines more beneficial than topic outlines? if someone asked wouldnt it be simplir just to write your paper then to create a full sentence outline? how would you answer?Explain your response what steps will you take your

    asked by Stacie on May 7, 2009
  60. chemistry

    A definite amount of nh4cl was boiled with 100ml of 0.8N naoh for complete reaction. After the reaction, the reactant mixture containing excess of naoh was neutralized with 12.5ml of 0.75N nh2s04. Calculate the amount of nh4cl takedn The answer 3.78g who

    asked by Fai on February 10, 2013
  61. Ed. Tech

    Which definition below best describes the definition of theme within poetry? A. It is the pattern of rhyming lines within a poem. B. It is the underlying message that a poem conveys. C. It is the pattern of stressed and unstressed syllables in a poem. D.

    asked by Gwen on September 10, 2014
  62. math

    A mobile shop sold one phone set everyday in the month of February and March of 2013. If each set costs $102, which of the following is closest to the money the shop earned in these two months? pick an answer that is right :/ (counfuesd) $5,000 $6,000

    asked by samantha on October 16, 2013
  63. chemistry

    Concentrated hydrochloric acid has specific gravity 1.18 and 36% hcl weight. What volume of concentrated hcl must be diluted to give 50gm of 10 percent My calculation 50gm x 10% = 5gm 5gm x 36.46 =182.3/ 0.36 = 506 / 1.18 = 429 ml I am not sure answer. Who

    asked by Fai on August 11, 2012
  64. Physics

    A pilot flies an airplane in a vertical circular loop at a constant speed õ = 160 m/s. If the pilot’s apparent weight at the top of the loop is one-third of his true weight when he is on the ground, find the radius R of the plane’s circular path.

    asked by Drew on March 19, 2010
  65. college algebra

    An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 2,500 + 400 ln a (a ¡Ý 1) How many units are sold after spending $1,000?

    asked by Tichie on March 8, 2013
  66. Chemistry

    First two hw of 50 that I am trying to get a handle on. Any help would be appreciated. 3.What gaseous substance is driven off of succrose when it is heated? is the answer CO2? 7.What gaseous substance is driven off of succrose when it is reacted with acid?

    asked by Bobby on August 8, 2010
  67. physics

    A 23.1 kg block is dragged over a rough, horizontal surface by a constant force of 95.0 N acting at an angle of angle 29.3 ° above the horizontal. The block is displaced 5.50 m, and the coefficient of kinetic friction is 0.341. Find the magnitude of the

    asked by Elisabeth on September 15, 2011
  68. Physics

    A markman fires a .22 caliber rifle horizontally at a target the bullet has a muzzle velocity with magnitude 750 ft/s. How much does the bullet drop in flight if the target is (a) 50.0 yd away and (b) 150.0 yd away? for this question i was given the

    asked by Sarah on June 7, 2009
  69. pre lab Q on chromatography

    suppose that there are two components, A and B, in a mixture. The chemical affinity of A for the stationary pahse is less than that of B and the chemical affinity of A for the mobile phase is greater than that of B. If the mixture is subjected to paper

    asked by Natash on April 19, 2009
  70. supply chain

    Supply Chain Risk: Research information on the Internet to assess the risks of a global supply chain. How have companies in the Microsoft supply chain been affected by disruptions to the supply chain due to events like strikes and natural disasters?

    asked by v on November 19, 2014
  71. The Curriculum

    Which of the following is not a good technique for stimulating children to value the arts? A. Talking with children about beauty in nature and the arts B. Creating and sharing your own artistic projects C. Integrating art and music into the curriculum D.

    asked by Daniela on August 23, 2014
  72. Physics

    A cube of mass m1 = 6.8 kg is sitting on top of another cube of the same size and mass m2 = 0.7 kg while they are both in free-fall. Ignoring any air resistance, what is the magnitude of the normal force with which the bottom cube is acting on the top

    asked by anon on February 23, 2015
  73. Chemistry

    Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(ℓ) −→ 2 HNO3(ℓ) + NO(g) If 916 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same

    asked by Anonymous on May 1, 2015
  74. Calculus

    The rate of growth dP/ dt of a population of bacteria is proportional to the square root of t with a constant coefficient of 9, where P is the population size and t is the time in days (0¡Üt¡Ü10). The initial size of the population is 700. Approximate

    asked by Beth on November 9, 2015
  75. Literature (Ms. Sue)(or Writeacher)

    The short story is called Chicoria by Rudolfo A. Anaya. How does the server respond when Chicoria says he expects to be fed well at the rancher's table? My answer: The servant becomes rather surprised by Chicoria's statement, causing him to explain to

    asked by Anonymous on May 14, 2013
  76. Physics

    A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.80 m. (i)What was the average acceleration of the driver during the collision? Express the answer

    asked by Oisin on July 20, 2010
  77. Physics

    A car, of total mass 1200 kg, is travelling at 90 km/h and strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.80 m. (i)What was the average acceleration of the driver during the collision? Express the answer

    asked by Oisin on July 20, 2010
  78. Art

    The picture is of colorful clogs. Through this collection, you can gain a better understanding of all of the following except. A. The history and traditions of a group of people. B. The diversity of a group of people during a specific time period. C. The

    asked by Gwen on September 12, 2014
  79. L.A

    In the diary of anne frank act 2 why wont Mr. Frank answer the telephone A. he doesn't speak dutch very well. B. he is afraid that the caller will give him bad news. C. he prefers to speak to people face to face D. he doesn't want anyone to know that the

    asked by anonymous on March 24, 2015
  80. Algebra

    An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 1,500 + 200 ln a (a ¡Ý 1)How many units are sold after spending $1,000? (Round

    asked by Jim on May 14, 2013
  81. math Steve for your solution

    0.224g sample that contained only bacl2 and kbr required 19.7ml of 0.1M ango3 to reach the end point. Calculate the percentage of each compound present in the sample. The right answer bacl2 32.4% KBR 67.7% You need to use 3 solution of drug H containing

    asked by Fai on December 28, 2013
  82. Algebra

    An advertising agency conducted a survey and found that the number of units sold, N, is related to the amount a spent on advertising (in dollars) by the following formula: N = 6,500 + 400 ln a (a ≥ 1) How many units are sold after spending $1,000? (Round

    asked by Larry on May 9, 2013
  83. Physical Science

    I need help answering these two questions, can someone please help? 1.How does energy transfer by waves differ from energy transer my moving objects? 2.Define amplitude and frequency as they relate to a wave. [I know amplitude is the height of a wave and

    asked by mysterychicken on May 4, 2009
  84. physics

    A ball is projected horizontally from the edge of a table that is 1.2 m high, and it strikes the floor at a point 1.11 m from the base of the table.The acceleration of gravity is 9.8 m/s2 .How high is the ball above the floor when its velocity vector makes

    asked by monica on September 20, 2011
  85. MATH

    A tree is "x"meters high. The angle of elevation of its top from a point P on the ground is 23degrees. Form another point Q, 10meters from P and in line with P and the foot of the tree, the angle of elevation is 32degrees. Find "x". (Please don't give me

    asked by Nazharia on March 5, 2008
  86. trig

    The number of revolutions made by a figure skater for each type of axel jump is given. Determine the measure of the angle generated as the skater performs each jump. Give the answer in both degrees and radians. a. single axel: 1.5 b. double axel: 2.5 c.

    asked by meg on September 6, 2008
  87. chemistry

    Nitric acid can be produced by the reaction of gaseous nitrogen dioxide with water. 3 NO2(g) + H2O(ℓ) −→ 2 HNO3(ℓ) + NO(g) If 900 L of NO2 gas react with water, what volume of NO gas will be produced? Assume the gases are measured under the same

    asked by Anonymous on December 3, 2016
  88. Math

    There's a question I've been having difficulty solving, and I would really appreciate if you can show he steps to how I can achieve the answer. QUESTION: The numbers 1, 4, 10, 20, and 35 are called tetrahedral numbers because they are related to a four

    asked by Sarah on July 27, 2015
  89. Chemistry

    In the process of separating pb2+ ions from cu+2 ions as sparingly soluble iodates, what is Pb2+ concentration when Cu+2 begins to precipitate as sodium iodate is added to a solution that is initially 0.0010M Pb(NO3)2 (aq) and 0.0010M Cu(NO3)2 (aq)? I know

    asked by Anonymous on January 29, 2015
  90. Chemistry

    What is the pH of a solution prepared by mixing 50.0 mL of 0.010 mol/L HCl(aq) and 50.0 mL of 0.010 mol/L Ca(OH)2(aq)? Assume the temperature is 25 degrees Celsius. Additional information given: Kw = 1.0×10^−14 at 25 degrees Celsius. The possible

    asked by allie on May 4, 2016
  91. The Curriculum

    Which of the following is not a good technique for stimulating children to value the arts? A. Talking with children about beauty in nature and the arts B. Creating and sharing your own artistic projects C. Integrating art and music into the curriculum D.

    asked by Daniela on September 12, 2014
  92. college math

    The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your

    asked by joyce on July 10, 2011
  93. History

    All of the following are examples of how a local jurisdiction may have tried to inhibit African-Americans from voting prior to the Voting Rights Act, except: Poll Taxes Literacy Tests Intimidation and Violence Skin Color Comparison Tests Is the answer poll

    asked by Jim on May 8, 2009
  94. 7th grade math

    Jared wants to save $100 to buy a tennis racket. He saces $8 each week, and his mother gives him a extra $0.25 for each dollar he saves. Determine the number of week it will take Jared to save $100. I am pretty sure the answer is 12 weeks and he would have

    asked by Peyton on August 25, 2009
  95. statistics

    A multiple choice exam has 20 questions; there are four choices for each question. A student guesses the answer to every question. Find the chance that he guesses correctly between four and seven times. Find the minimum score the instructor can set so that

    asked by m on February 10, 2014
  96. chemistry

    Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a

    asked by jessie on September 11, 2016
  97. statistics

    What is the alternative hypothesis for a null hypothesis stating that the average time a person keeps a cell phone is at most three years. Answer: Ha: mu > 3 State the null and alternative hypotheses for the following: You are investigating a complaint

    asked by Anonymous on January 26, 2012
  98. math

    RATES OF CHANGE QUESTION A spherical balloon is being blown up so that its volume is increasing by 0.6 m^3 s^-1. Find the rate at which the radius is increasing when the radius is 0.1 m. So what I did was that I determined dV/dt =0.6 and dV/dr = 4/3 r^3

    asked by tina on June 13, 2010
  99. Microeconomics

    Medical doctors earn higher incomes than people who have a Ph.D. in economics. This is partly because A. Medical doctors are more likely to face malpractice lawsuits. B. The costs of receiving necessary medical education are higher. C. A relatively small

    asked by Anthony on May 27, 2015
  100. algebra

    The formula b=27a, is used in New England to estimate the minimum furnace output, b, in BTUs, for a modern house with a square feet of flooring. What is the minimum furnace output for BTUs? What is the answer to A? I have searched and listened to all kinds

    asked by Demi on January 8, 2011

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