colin

Most popular questions and responses by colin
  1. Chemistry

    The equilibrium constant for the reaction: 2NO(g)+Br2(g)2NOBr(g) Kc=1.3x10^-2 at 1000 Kelvin Calculate Kc for: NOBr(g)NO(g)+ 1/2Br2(g)

    asked on February 26, 2012
  2. AP CHEM HELP

    When NH3 is added to solid Hg2Cl2, some of the mercury ions are oxidized and some are reduced. A reaction where the same substance is both oxidized and reduced is called a disproportionation reaction. Write equations for each of these half-reactions. HELP

    asked on April 9, 2013
  3. AP Chemistry

    The Synthesis of an Iron Oxalato Complex Salt (“Green Crystals”) In this experiment you will synthesize a compound that will contain the elements potassium, iron, carbon, hydrogen, and oxygen. Carbon and oxygen will be present in the compound as

    asked on October 17, 2012
  4. chemistry

    A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 400 mL of a solution that has a concentration of Na+ ions of 1.00 M?

    asked on October 13, 2011
  5. maths

    Marie can afford a $250 per month car payment. She’s found a 5 year loan at 7% interest. a. How expensive of a car can she afford? b. How much total money will she pay the loan company? c. How much of that money is interest?

    asked on July 18, 2012
  6. Chemistry

    If you mix 50.0 mL of a 0.500 M solution of calcium nitrate with 150. mL of a 0.250 M solution of potassium nitrate, what would be the resulting molarity of nitrate ions in the final mixed solution ?

    asked on January 24, 2016
  7. chemistry

    calculate the pH of 20.00mL of 2.00 M HCl diluted to 0.500 L

    asked on February 26, 2012
  8. math

    The height, h(t), of a projectile, in metres, can be modelled by the equation h(t) = 14t – 5t2, where t is the time in seconds after the projectile is released. Can the projectile ever reach a height of 9m? Explain.

    asked on October 14, 2012
  9. Maths

    I divide exactly by 100 my first two digits are equal the sum of my four digits is 8

    asked on February 25, 2013
  10. Physics

    a driver sees a horse on the road and applies the brakes so hard that they lock and the car skids to a stop in 24 m. the road is level and the coefficient of kinetic friction between the tires and the road is 0.7. How fast was the car going when the brakes

    asked on October 23, 2012
  11. Physics II

    Jose, whose mass is 75 kg, has just completed his first bungee jump and is now bouncing up and down at the end of the cord. His oscillations have an initial amplitude of 11.0 m and a period of 4.0 s. From what height above the lowest point did Jose jump?

    asked on March 1, 2011
  12. maths

    How much would you need to deposit in an account now in order to have $20,000 in the account in 4 years? Assume the account earns 5% interest.

    asked on July 18, 2012
  13. math

    write this number in word form 310,763,136 write this number in expanded form 20,484,163

    asked on September 1, 2015
  14. Chemistry

    assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and is equal to 1.86 C/m .

    asked on January 27, 2012
  15. chemistry

    A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) ----->K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in

    asked on October 14, 2011
  16. physics

    A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to 2.6 times her weight as she goes through the dip. If r = 20.0 m, how fast

    asked on November 23, 2010
  17. maths

    You deposit $1000 each year into an account earning 8% compounded annually. a. How much will you have in the account in 10 years? b. How much total money will you put into the account? c. How much total interest will you earn?

    asked on July 18, 2012
  18. Chemistry

    Calculate the [OH-] for a solution in which [H+] is 1000 times greater than [OH-]? and will the final result be acidic, basic, or neutral?

    asked on February 25, 2012
  19. chemistry

    In the following experiment, a coffee-cup calorimeter containing 100 mL of H20 is used. The initial temperature of the calorimeter is 23.0 C . If 3.60 g of CaCl2is added to the calorimeter, what will be the final temperature of the solution in the

    asked on October 20, 2011
  20. Chemistry 101

    A solution of .12 L of 0.160 M KOH is mixed with a solution of .3 L of 0.230 M NiSO4. the equation for this reaction is: 2KOH (aq)+NiSO4 (aq) ----->K2SO4 (aq)+Ni(OH)2 (s) .89 grams of Ni(OH)2 precipitate form I need to know the concentration remaining in

    asked on October 14, 2011
  21. physics

    a 5-kg crate is resting on a horizontal plank. the coefficient of static friction is .5 and the coefficient of kinetic friction is .4. after one end of the plank is raised so the plank makes an angle of 25 degrees with the horizontal, the force of friction

    asked on October 26, 2010
  22. science

    What is the ratio of sulfur atoms to oxygen atoms in SO2?

    asked on November 17, 2007
  23. history

    which economic activities are most dependent on georgia's climate? a lumber and mining b imports and exports c agriculture and tourism d transportation and telecommunications

    asked on March 15, 2019
  24. Chemistry

    2 moles of helium (He) are pumped from a gas canister into a weather balloon. The balloon at this point has a volume V1. 1 mole of nitrogen gas (N2) is added at the same temperature and pressure. The volume of the balloon changes to V2. How will the new

    asked on April 17, 2013
  25. AP Chem

    (MnO40- + (C2O4)2- + H+ = CO2 + H2O + ? OR (MnO4)- + (C2O4)2-+ OH-=CO2 n+ H2O +? Can somebody please help me predict the products? I can balance it i just need help determining what to balance.

    asked on October 23, 2012
  26. maths

    How much money will I need to have at retirement so I can withdraw $60,000 a year for 20 years from an account earning 8% compounded annually? a. How much do you need in your account at the beginning b. How much total money will you pull out of the

    asked on July 18, 2012
  27. Chemistry

    Determine the volume (in mL) of 0.844 M hydrochloric acid (HCl) that must be added to 38.0 mL of 0.650 M sodium hydrogen phosphate (Na2HPO4) to yield a pH of 6.92. Assume the 5% approximation is valid and report your answer to 3 significant figures. Look

    asked on March 9, 2011
  28. Gr.7 - math

    4. The dimensions of a king-size waterbed are 2.1m, 1.8m, and 23 cm. Find the volume and mass of the water it contains when full.

    asked on January 5, 2010
  29. science

    You have a pulley 13.9 cm in diameter and with a mass of 1.7 kg. You get to wondering whether the pulley is uniform. That is, is the mass evenly distributed, or is it concentrated toward the center or the rim? To find out, you hang the pulley on a hook,

    asked on October 22, 2013
  30. math

    if 400 customers come to a grand opening and every 5th customers receives a coupon for jeans and every 7th customers receives a coupon for a free sweater. how many customers will leave with both

    asked on November 1, 2012
  31. science

    how many atoms of S are there in 3 (NH4)2 SO4

    asked on October 27, 2015
  32. magnetism

    A charged particle with charge q is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendiculuar to the same magnetic field. The time to complete one full circular revolution for

    asked on December 18, 2013
  33. Math

    The area A of a triangle is given by the formula A=1/2bh If the base of the triangle with height 12 inches is doubled, its area will be increased by 48 square inches. Find the base of the orignial triangle.

    asked on February 10, 2010
  34. 10th grade

    Whatis the difference between the Hudson Bay Lowlands and the Arctic Lowlands?

    asked on November 12, 2008
  35. Algebra

    Okay i have a few function questions im gonna post. Im completely confused with these so any help would be great. Minimum or maximum value of: f(x)=2x^2+4x+1 and f(x)=x^2-3x+2 then if f(x)=x^2+9 and g(x)=x-4, find (g*f)(-3) next is if f(x)=x^3+x^2-x-1 and

    asked on December 12, 2007
  36. Physics

    You would like to shoot an orange in a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. On your first try, you fire the arrow at 32.0 m/s at an angle of 30.0° above the horizontal from a height of 1.10 m while standing 52.0 m

    asked on September 30, 2015
  37. chemistry

    the molarity of a solution composed of 25.4g KHCO3 diluted with water to a total volume of 200 mL

    asked on October 18, 2011
  38. Chemistry

    Determine the molarity (in mol/L) of NO2− ions in solution when 9.77×101 g of sodium nitrite is added to enough water to prepare 3.94×102 mL of the solution.

    asked on March 2, 2011
  39. Chemistry

    A mixture containing CH3OH, HF, CH3F, and H2O, all at an initial partial pressure of 1.04 atm, is allowed to achieve equilibrium according to the equation below. At equilibrium, the partial pressure of H2O is observed to have increased by 0.43 atm.

    asked on March 9, 2011
  40. chemistry

    The mole fraction of an aqueous solution of sodium dichromate is 0.367. Calculate the molarity (in mol/L) of the sodium dichromate solution, if the density of the solution is 1.42 g mL-1.

    asked on February 25, 2011
  41. Chemistry

    chemistry question. How many grams of silver sulfide can be produced by heating 45 grams of silver excess sulfer?

    asked on January 9, 2011
  42. Math

    The area A of a triangle is given by the formula A=1/2bh If the base of the triangle with height 12 inches is doubled, its area will be increased by 48 square inches. Find the base of the orignial triangle.

    asked on February 10, 2010
  43. math

    Find the slope of the line passing through the points A(-4, 3) and B(4, 2)

    asked on August 30, 2011
  44. Physics

    a 10kg table needs to be pushed across the floor (µ=3). u stand behind it and push it at an anjgle of 30 degrees down with a force of 60N. wats the acceleration of the table?

    asked on April 7, 2008
  45. Algebra (word problems)

    1) a small pipe can fill a tank in 16 min more time than it takes a large pipe to fill the same tank. Working together, both pipes can fill the tank in 6 min. How long would it take each pipe working alone to fill the tank? 2) a car travels 240 mi. a

    asked on December 12, 2007
  46. Algebra

    a cessna can fly at a rate of 220 mph in calm air. traveling with the wind, the cessna flew 780 mi in the same amount of time as it flew 540 mi against the wind. find the rate of the wind. how do i set this problem up? please explain in detail cuz i don't

    asked on October 15, 2007
  47. math

    write the number in two other forms 6,007,200 and 32,005,008

    asked on September 1, 2015
  48. math

    sam makes $400 per week plus $20 commission on each new cell phone plan she sells. Write an equation to determine how many plans she sold to earn $680 last week.

    asked on October 20, 2014
  49. Magnetism

    A circular wire loop of mass M and radius R carries a current I. It hangs from a hinge that allows it to swing in the direction perpendicular to the plane of the loop. A uniform magnetic field B exists everywhere in space pointing upwards. What angle θ

    asked on December 18, 2013
  50. magnetis

    A metal spring can be used as a solenoid. The spring is stretched slightly, and a current is passed through it. The resulting magnetic field will cause the spring to a. collapse (shorten) b. stretch (lengthen) c. not change (nothing happens) d. ranslate

    asked on December 18, 2013
  51. Physics

    Vector A has a magnitude of 5.00 units, vector has a magnitude of 5.00 units, and the dot product A·B has a value of 16. What is the angle between the directions of A and ?

    asked on January 20, 2013
  52. Math

    A toy train has 20 cars- blue, purple and orange. There are 4 times as many blue cars as purple cars. There are 5 times as many orange cars as purple cars. How many of each color are there?

    asked on September 12, 2012
  53. math

    whats 17.50x30

    asked on November 21, 2011
  54. CHEMISTRY URGENT!!!

    Determine the pH (to two decimal places) of the solution that is produced by mixing 30.3 mL of 1.00×10-4 M HBr with 829 mL of 5.77×10-4 M Ca(OH)2.

    asked on March 23, 2011
  55. 7th grade

    5. What is the mass of the water? a. that fills a 1m^3 tank b. that fills a 2L bottle c. that would fill you empty classroom Thanks for your help!

    asked on January 5, 2010
  56. Geography

    What is happening to the distance between Canada and Europe? Which plates meet near the west coast of Canada? In whihc direction are they moving?

    asked on November 13, 2008
  57. algebra

    simplify (numbers AFTER the variable represent exponents) ALSO these are all fractions, theres just no way to put the line x2-64 . x2-x-6 _ 1 x2-4x-12 x2+5x-24 x-6

    asked on October 15, 2007
  58. Physics

    I know how to get the speed if it accelerated the whole time. How do I calculate the cruising speed? Starting from rest, a car travels 1,350 meters in 1 min. It accelerated at 1 m/s^2 until it reached its cruising speed. Then it drove the remaining

    asked on September 7, 2007
  59. Math

    Airport control tower measures the distance to one plane taken off at 500m and distance to second plane coming for a landing at 1050m. If the angle between the lines of observation on radar screen is 86 degrees> how far apart are the two planes?

    asked on January 16, 2017
  60. math

    write the number in two other forms 6,007,200 and 32,005,008

    asked on September 1, 2015
  61. physics

    At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.1 m until, at t = 1.64 s, it is traveling east. The car does not alter its speed during the turn. (a) Find the car's speed. (b) Find

    asked on January 28, 2014
  62. chemistry

    The mole fraction of an aqueous solution of magnesium chlorate is 0.371. Calculate the molarity (in mol/L) of the magnesium chlorate solution, if the density of the solution is 1.39 g mL-1.

    asked on February 28, 2012
  63. 5th grade

    how do you break apart to divide: 648 by 6 using compatible numbers to break apart the dividend.

    asked on August 31, 2010
  64. science

    what is a ernmeyer flask and a granulated cylander used for?

    asked on September 27, 2009
  65. math

    what is the gcf of 24,32

    asked on November 5, 2008
  66. Algebra

    an amtrak trainand a car leave new york city at 2 PM and head for a town 300 miles away. the rate of the amtrak train is 1 1/2 times the rate of the car. the train arrives 2h ahead of the car, find the rate of the car

    asked on October 15, 2007
  67. physical science

    two cars 200meters apart drive towards one another. If one car travels at 12 meters/s and the other at 26 meters/s how long does it take for them to collide?

    asked on April 7, 2013
  68. Maths

    How do yo calculate a number to the power of 2.08 i.e. not a whole number. so 4 to the power of 2.08 Thanks.

    asked on May 11, 2012
  69. math

    we have a problem that my parents cant help with. 846*2=(...+40+...)*2=(800 over ...+...over2+6 over...)=(400+...+3)...=... ...means blank space for a number. Can you help with this problem, so that I can figure out the rest of the problems.Thanks

    asked on August 31, 2010
  70. Music

    I need a new written add on verse of bob dylan chimes of freedom song has to be 8 lines long and the last line is An' we gazed upon the chimes of freedom flashing.

    asked on May 29, 2010
  71. algebra

    Need help showing me the steps without using the carrot function: Find the product. (2y + 2z)(2y - 3z)

    asked on February 23, 2010
  72. Reading

    What is the definition of the word embers?

    asked on October 21, 2009
  73. Friedman test: Can !?

    I have 28 participants. Each completed five tests. The maximum score a participant could receive on any one test was 4/4. The lowest score anyone could receive was zero. I will do a Friedman test for this paired data. My question: given that I have a very

    asked on August 13, 2009
  74. English

    I have 28 participants. Each completed five tests. The maximum score a participant could receive on any one test was 4/4. The lowest score anyone could receive was zero. I will do a Friedman test for this paired data. My question: given that I have a very

    asked on August 13, 2009
  75. Geography

    What is happening to the distance between Canada and europe

    asked on November 15, 2008
  76. Geography

    Name the five largest plates and on which plate Canada is located?

    asked on November 13, 2008
  77. science

    potential energy is energy of _______ or chemistry?

    asked on November 6, 2008
  1. worl geography

    It is d because a is federations that's not a type of government, b doesn't make sense and c is not in these countrys

    posted on March 5, 2018
  2. Math

    A. You basically add two numbers together to get 60. So it's basically __ + __ = 60, and you can put in any two numbers that equal 60 when added. B. It's almost the same as what I said for the first problem, except it's __ x __ = 60, so you find two

    posted on October 17, 2017
  3. math

    1. If each person gets 1 serving, then you would need to get 4 cakes, and have 23 servings left over. If you get 3 cakes, one person won't get any servings of cake, so you need 4 cakes. 2. For this one, you need the time it takes her to complete her

    posted on October 9, 2017
  4. American Government

    lol dad

    posted on March 9, 2017
  5. Physical Science

    88.89 km/hr

    posted on February 10, 2017
  6. Algebra with pizzazz

    it has diabetes

    posted on September 9, 2016
  7. nuclear chemistry

    I know this is too late for you Nancy and you Andrew, but I thought it might be useful for other students out there. So, to solve this problem we: First convert 1.0 MW to W then to J/s 1.0 MW x 10^6 W/MW x ((1.00 J/S)/W) = 1.0 x 10^6 J/s Next we use the

    posted on August 26, 2016
  8. chemistry

    agreed

    posted on February 2, 2016
  9. math

    1/3

    posted on January 7, 2016
  10. 5th grade religion

    poooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooopppppppppppppppppppppoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo

    posted on September 15, 2015
  11. math

    write this number in two forms 6,007,200 and 32,005,008

    posted on September 1, 2015
  12. physics

    2465

    posted on January 20, 2015
  13. Physics

    A boat beguins on the best side of a river and heads straight east across the river with a speed of 1.9 Ft/s (relative to the water). the river water flows NORTH at the speed of 2.^ Ft/s (relative to the shore). The resultant veliocty of the boat (

    posted on November 19, 2014
  14. geometry

    Eg if EF=13cm

    posted on September 4, 2014
  15. Chemistry

    2.00x10^-3

    posted on March 18, 2014
  16. PHYSICS

    work out the velocity from right hand rule. Remember what current means in terms of conventional current.

    posted on December 17, 2013
  17. electricity and magnets

    Think about conventional current.

    posted on December 17, 2013
  18. magneismt

    what statements?

    posted on December 17, 2013
  19. Physics

    not yet

    posted on December 16, 2013
  20. Physics

    So did this work out Lora?

    posted on December 16, 2013
  21. PHYSICS

    That seems really small.

    posted on December 16, 2013
  22. PHYSICS

    whats h? is that the height 10 cm?

    posted on December 16, 2013
  23. PHYSICS

    There are two things in life, physics and everything else is stamp collecting.

    posted on December 5, 2013