1. Chemistry

    How many electrons does the bromine of BrF3 have in its outermost valence shell? Is it still seven like it would be when Br is by itself? Is it four because the three F would "take" one each to fill their octets? Or is it some other number?

    asked by T on April 30, 2016
  2. Science

    How does the movement of electrons and protons create large amounts of energy in oxidative phosphorylation?

    asked by EL on March 1, 2011
  3. Chemistry

    Draw the Lewis dot diagram of CO2, how many types of electrons are in the valence bond?

    asked by Cro on April 24, 2013
  4. chemistry

    In diatomic molecules of elements, the electronegativites of the two atoms are _________, so the electrons are shared ___________.

    asked by claire on April 26, 2010
  5. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 2, 2018
  6. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 2, 2018
  7. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 2, 2018
  8. ap chem

    All the electrons of this element are spin-paired. Carbon Nitrogen Oxygen Flourine Neon

    asked by Liz on September 2, 2008
  9. Physics

    An experimenter finds that no photo-electrons are emitted from tungsten unless the wavelength of light is less than 270nm.

    asked by Paul on September 23, 2014
  10. science

    what is the correct number of protons, neutrons and electrons in a neutral Cadmium-112 atom?

    asked by duane on July 14, 2014
  11. chemistry

    A cell, transferred 0.146 mol of electrons with a constant current of 1.24 A. How long, in hours, did this take?

    asked by Rishikesh on April 20, 2008
  12. chemistry

    What is the total number of valence electrons that must be shown in the Lewis structure for magnesium fluoride I think 16 but im not sure

    asked by samantha on November 29, 2010
  13. science help

    How many valence electrons does an atom of rubidium (Rb atomic number 37) have? A.One B.Five C.Six D.37 is it a pls help me ms sue or damon or anybody

    asked by Oscar on March 30, 2015
  14. chemistry

    How many electrons are in the outermost principal energy level of an atom of nitrogen in the ground state?

    asked by Sabrina on September 26, 2012
  15. chemistry

    Examine the unbalanced electrolytic reaction. Li+(aq) + Zn(s) → Li(s) + Zn2+(aq) How many electrons are transferred in the balanced equation? 4 1 2 3

    asked by madison on June 9, 2018
  16. science

    Two electrons are fiXed 2 cm apart .another eleCtron is shot from infinity and stops midway between the two .what is the initial speed?

    asked by Anonymous on July 1, 2018
  17. Chemistry

    What is the maximum number of electrons in an atom that can have the following quantum numbers? n= 4 ml= -3 ms= +1/2 How would you figure that out given those information? What's the process of that?

    asked by Ezra on November 4, 2012
  18. Chemistry

    How does BF4^- make tetrahedral structure. Because B have 3 outermost electrons. It may combine with three fluorine. But how is it combining with 4?

    asked by Noor on October 25, 2014
  19. Chemistry

    Electrons in the outermost principal shell of an atom that are involved in chemical bonding are referred to as:

    asked by Ed on November 14, 2011
  20. physical science

    is this correct or incorrect nonmetal are elements that tend to gain electrons in chemical reactions.

    asked by liz on November 3, 2007
  21. BIOCHEM

    what are the problems created by using molecular oxygen as a recipient of the electrons from the oxidation of carbon compounds.

    asked by DAN on March 14, 2011
  22. chemistry

    how many electrons are transfered in one atom of Mn in the reaction?MnO2+4HCl=MnCl2+2H2O+Cl2

    asked by Natty on December 7, 2015
  23. chemistry 1

    Predict Zeff for the outermost electrons in the Rb atom based on the calculations for Na and K using Slater's rules.

    asked by hiphop on April 10, 2014
  24. science

    true or false:: When the electrons are aligned in the magnetic domains of two materials, magnetization can occur.

    asked by Lex on February 13, 2011
  25. chemistry

    Predict Zeff for the outermost electrons in the Rb atom based on the calculations for Na and K using Slater's rules.

    asked by hiphop on April 10, 2014
  26. Chemistry

    how many electrons pairs surround an atom of boron (B,element 5) bonded in the compound BCI3?

    asked by Tal on May 31, 2009
  27. chemistry

    WOuld you expect each of the following atoms to gain or lose electrons when forming ions? What ion is most likely in each case? a. Na b. Sr c. P d. Ba

    asked by shirley on September 7, 2009
  28. physics

    What is the longest wavelength of light that will emit electrons from a metal whose work function is 3.10eV?

    asked by Anonymous on April 24, 2009
  29. Physical science

    Why is it easy for a magnesIum(mg number 12) To lose 2 electrons. Is it because the nuclear charge of the mg atom is relatively weak?

    asked by Jules on April 18, 2011
  30. physics

    The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be

    asked by Sara on March 24, 2012
  31. Chemistry

    The element in the period 2 group 6 gains/ loses ______ electrons to become a cation/ anion?

    asked by Mileena on March 6, 2017
  32. Chemistry

    In the ground-state electron configuration of Fe^{3+}, how many unpaired electrons are present? An explanation would be great, thanks.

    asked by Ezra on October 31, 2012
  33. Physics

    Two spherical objects with a mass of 2.88 kg each are placed at a distance of 2.12 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

    asked by Tanner on June 7, 2012
  34. Physics

    How much work must be done to bring three electrons from a great distance apart to within 2.1×10−10 {\rm m} from one another (at the corners of an equilateral triangle)?

    asked by Tiffany on February 6, 2011
  35. Science

    Atoms share electrons or donates and accepts them to A. bond B. become stable C. to gain mass D. both A and B I think it is C

    asked by Anonymous on October 10, 2011
  36. Gen Chem

    What is n, the number of moles of electrons transferred, in the following reaction? 2 MnO4-(aq) + 16 H+(aq) + 10 Cl-(aq) ===> 2 Mn2+(aq) + 5 Cl2(g) + 8 H2O(l).

    asked by Sarah H on March 28, 2008
  37. Physics

    Two spherical objects with a mass of 7.60 kg each are placed at a distance of 2.93 m apart. How many electrons need to leave each object so that the net force between them becomes zero?

    asked by Becky on June 6, 2012
  38. Science

    Which element has 6 energy levels and 7 valence electrons? Astatine (At) Polonium (Po) Seaborgium (Sg) Rhenium (Re)

    asked by ? on February 1, 2018
  39. Science

    I combine with two oxygen atoms to make sand. I have four valence electrons, Whar element am I?

    asked by mary k. on February 25, 2011
  40. Physical Science

    If an element has a +1 positive charge and the following chemical symbol, how many electrons does it have? 17 on top, 6 on bottom, Oxygen (O) A. 7 B. 17 C. 5 D. 18

    asked by Hannah on February 14, 2017
  41. ap chem

    in a sigma antibonding orbital where are the electrons most likly to be found in relation to the nuclei in a bond?

    asked by mary on January 2, 2013
  42. ga history

    1. 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 5. Metropolitan Atlanta's rapid growth has proven to be a major strain on the

    asked by kathy ms.sue please help asap on October 27, 2014
  43. Physics

    the wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find the magnitude and direction of the net external force on the sailboat.

    asked by tom on April 10, 2012
  44. Physics

    Find the magnitude of the gravitational force a 65.4 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 1024 kg and a radius of 6.37 × 106 m. The universal gravitational constant is 6.673 × 10−11 N · m2/kg2.

    asked by Jacky on January 29, 2013
  45. College Algebra

    The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 45 years. (Round your answer to one decimal place.)

    asked by Lexi on November 10, 2010
  46. algebra

    Write and solve an inequality to find the approximate circumference of Earth using the following information - the 4 million miles of public roads in the U.S. would: Reach to the moon and back more than eight times, circle the globe more than 157 times

    asked by Ashley on September 30, 2010
  47. beast mode question

    Beastmode Question You see me twice a minute, thrice an hour and geometrically equal to the time elapsed. If the sun rise at x m/sec and the cloud run through the sky at y m/sec, find the maximum RADIUS OF THE EARTH.

    asked by zeff on October 7, 2016
  48. Physics

    If the gravitational force on you is 670N on the earth, how strong is the gravitational force on you on the surface of a neutron star that has the same mass as our sun and a diameter of 20.0km ? Take the mass of the sun to be ms = 1.99×1030kg , the

    asked by Kaleb on February 25, 2014
  49. algebra 2

    A commercial freight carrier is flying at a constant speed of 400mi/h and is traveling 4 mi east for every 3 mi north. A private plane is observed to be 210 mi due east to the commercial carrier, traveling 12 mi north for every for 5 mi west. a.If it is

    asked by Songthan on January 2, 2011
  50. Calculus

    The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the

    asked by George on November 9, 2008
  51. physics

    A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 3.30 g at its outer end. This centrifuge is now used in a space capsule on the planet Mercury, where g mercury is 0.378 what it is on earth. How many rpm (in terms of n)

    asked by bobjahng2 on November 26, 2010
  52. Hard Calculus

    The gravitational force, F, on a rocket at a distance, r, from the center of the earth is given by F=k/r^2 where k = 10^13 newton • km2. When the rocket is 10^4 km from the center of the earth, it is moving away at 0.2 km/sec. How fast is the

    asked by George on November 9, 2008
  53. math

    Studying for a final help. Many people know that the weight of an object varies on different planets,but did you know that the weight of an object on earth aalso varies according to the elevation of an object? In oparticular, the weight of an object

    asked by tera on April 9, 2009
  54. physics

    On July 15, 2004, NASA launched the Aura spacecraft to study the earth's climate and atmosphere. This satellite was injected into an orbit 705 {\rm km} above the earth's surface, and we shall assume a circular orbit. How many hours does it take this

    asked by Amber on April 27, 2012
  55. Science

    The Environmental Defense Fund, The Friends of the Earth, and The Natural Defense Council, are all divisions of The Environmental Protection Agency. True*** False After the first Earth Day, the Sierra Club expanded to 20 states in 1970. In 1971, the

    asked by Kaai97 on June 12, 2016
  56. history

    Can someone give me links for these please? Describe the military strategy that General William T. Sherman used across Georgia and South Carolina. Explain how the strategy affected the south, as well as how southerners reacted. Explain the purpose of

    asked by Alexis on May 11, 2016
  57. Physics

    You have just discovered a planetary system consisting of a star (Dagobahr) and its two planets: Rool and Krau. Planet Rool has an average orbital radius 3 times as big as planet Krau. If planet Rool orbits Dagobahr in 2 earth years (1earth year = 365

    asked by Andrea on November 15, 2007
  58. Physics

    On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.1 times as far as he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 50 m/s at an angle of

    asked by Anonymous on September 19, 2012
  59. physics

    vector A = a displacement of 20 m due east vector B = a displacement of 30 m north find the magnitude and direction of the vector sum a+b

    asked by torrance on June 13, 2017
  60. Science

    Insolation refers to the amount of solar energy that reaches a body, such as a planet. the amount of heat energy contained in a beam of sunlight. the imaginary line that runs around Earth's middle. the spherical shape of Earth I don't know this one. The

    asked by Anonymous on April 20, 2018
  61. Science help

    India : Duck Australia : Duck South Africa : Duck, Goose Africa : Duck Cat Antarctica: Duck Goose cat If scientist wanted to argue that South Africa, Africa, and Antarctica was once connected, which animals would they use to determine that? Would it be

    asked by Chopsticks on April 2, 2009
  62. world history

    Which of the following statements is true of the Gulf of Tonkin affair? A. Johnson told Congress to pass the Gulf of Tonkin Resolution to let him expand the war. B. Congress was divided and only reluctantly passed the Gulf of Tonkin Resolution. C. The

    asked by L on July 30, 2014
  63. Algabra 2

    An airplane cruises northeast at a steady rate. Its speed can be broken down into two components:320 miles per hour due north and 40 milers per hour due north be the direction of the positive y-axis and let due east be the direction of the positive x-axis.

    asked by Raygan on December 19, 2011
  64. History

    1.Which answer best describes a reason why industries flourished in New England? A- The people in New England had more work experience. B- New England had more lakes to use for water in factories. C- The soil was better than in the South so they could grow

    asked by Emma on April 28, 2015
  65. Physics

    A 750 kg car traveling 22.0 m/s due north crashes into a 1500 kg truck traveling 20 m/s due west. The two vehicles become locked together and travel 19.0 m before stopping. Find the average frictional force (magnitude and direction) that brings the two to

    asked by Chad on August 10, 2012
  66. Engineering science

    A boat start sailing on Monday 10:00 at harbour A and sails 600km due north. Later it turns east for a further 420km to reach harbour B on Tuesday at 12:00.a)find total displacement from A-B average. b)speed of the trip.c)average velocity

    asked by Isaac B.Acheampong on May 5, 2017
  67. science

    the sun sets, fully disappearing over the horizon as you lie on the beach, your eyes 10 cm above the sand. you immediately jump up, your eyes now 130 cm above the sand, and you can again see the top of the sun. If you count the number of seconds (=t) until

    asked by john on August 31, 2008
  68. physics

    An airplane is flying above the Earth's surface at a height of 10.9 km. The centripetal acceleration of the plane is 16.7 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km. Please

    asked by Uoit student on November 30, 2016
  69. Math

    The Andromeda Constellation is the furthest object we can see with the unaided eye. It is about 22,000,000,000,000,000 km from Earth. Light travels in space at a speed of about 300,000 km/s. Calculate how many years light takes to reach Earth from the

    asked by Larry on September 15, 2008
  70. History

    1. What were the Townshend Acts? (1 point) -The British put taxes on imported goods such as tea and glass. (answer) -The British put taxes on hotels and other lodging accommodations. -The British put taxes on newspapers, magazines, and official licenses.

    asked by Anonymous on October 8, 2014
  71. physics

    A motorist A leaves a small town and drives East at 28 ms-1 . A second motorist B is driving South towards the same town at 23 ms-1 . Draw a diagram and find the velocity of motorist B relative to motorist A? ( VB REL A ) is this just phythagoras and

    asked by jp on August 22, 2014
  72. Social Studies

    What do many of the political conflicts in South Asia have in common? I think that many of the political conflicts in South Asia are based off of conflicting religions. In the past there have been many rivals between Hindus and Muslims, which causes much

    asked by Scarlet on May 7, 2016
  73. ship problem

    A [B]ship P [/B] is travelling due [B]East at 30 km/h[/B] and a [B]Ship Q[/B] is travelling due [B]South at 40 km/h. [/B] Both ships keep constant speed and course. [B]At t=0 they are each 10 km [/B] from the point of intersection of their courses and

    asked by rav on July 15, 2006
  74. physics

    a spider crawls 4.7 m at an angle of 24 degrees north of east. another spider crawls 5.2m at an angle of 24 degrees east of north. what is the eastward displacement of the spiders?

    asked by vicki on February 2, 2011
  75. physics

    Suppose you had two small boxes, each containing 1.0 g of protons. (a) If one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!) string, what would be the tension in the

    asked by Jen on January 21, 2008
  76. Exploring Space

    if a satellite were to be launched with too little speed or too much speed then what would happen? If a sattellite were to be launched with too much speed then the friction in the air would make it heat up to the point where it would burn up. Earth's

    asked by Sara on March 15, 2010
  77. History

    I need help finding 3 of the principals of economics from the passage below. The principals are people choose, all choices involve cost, and people respond to incentives. The passage: One of the first books, written in 1866, on the civil war was written by

    asked by Meg on September 18, 2017
  78. Physics

    A chain composed of four identical links is suspended by a rope and does not move. How many force vectors would be drawn on the free body diagram of each link and which direction would they point? My answer: ---------- FIRST LINK (top): Upward force from

    asked by Stanley on September 21, 2010
  79. Geography (Ms. Sue)

    1). How are the landforms of Europe both an advantage and a disadvantage to life in Europe? A: The landforms of Europe are an advantage as these landforms affect the climate in their favor. However, the mountains and uplands, for example, may be viewed as

    asked by Anonymous on September 28, 2013
  80. English

    Busan is the largest port city and second-largest city in South Korea. It lies on the southeast tip of the Korean Peninsula. It is important for transport and shipping. It is best known for Busan Port and Haeundae Beach. The port takes many ships and

    asked by rfvv on May 24, 2016
  81. trig

    a tower standing on level ground is due north of piont N and due west of point W, a distance 1,500 feet from N. If the angles of elevation of the top of the tower as measured from N and W are 8 and 11, respectively, find the height of the tower.

    asked by courtney on October 9, 2011
  82. physics

    Your English teacher can swim with a constant speed of 0.67m/s. While facing south , he attempts to swim straight across the St. Lawrence River , which moves east at 1.4 m/s a) find his velocity as seen from the riverbank. B) if the river was 175m wide How

    asked by Melissa on June 14, 2012
  83. Physics

    (II) Every few hundred years most of the planets line up on the same side of the Sun. Calculate the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line, Fig. 5–44. The masses are mV = 0.815 mE, mj = 318 mE,

    asked by clay on October 2, 2014
  84. physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-four times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites. Thank you!

    asked by Lola on June 22, 2015
  85. Physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

    asked by Anon on October 3, 2014
  86. Physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is eighty-two times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

    asked by Steve on October 3, 2014
  87. Physics

    Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-five times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.

    asked by Jackson Kerr on October 2, 2012
  88. chemistry

    If you had one mole of pennies to divide among all the people in the world, how many dollars would each person receive? Use 5thousand as the population of Earth. how do you find how many pennies are in one mole?

    asked by sh on January 12, 2009
  89. sci

    1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

    asked by ray on November 3, 2011
  90. sci

    1. A penny is dropped from the 82nd Floor Observatory of the Empire State Building. The penny will fall from a height of 320 meter (1,050 feet). (a) How long will it take to fall? (b) How fast is it going when it hits the ground? 2. Aim the Mythbuster’s

    asked by ray on November 3, 2011
  91. Social studies

    In which might the Spanish choice to claim North America land be considered controversial? A> Spanish explorers promised to free the slaves of North America. B>Spanish explorers failed to convert native people to Christianity. C> Spanish explorers seized

    asked by HELP I'M STUCK on November 20, 2017
  92. physics

    Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1500 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out

    asked by john on September 17, 2010
  93. PHYSICS-HELP!!

    Two bicyclists, starting at the same place, are riding toward the same campground by two different routes. One cyclist rides 1500 m due east and then turns due north and travels another 1430 m before reaching the campground. The second cyclist starts out

    asked by JENNA on September 17, 2010
  94. Geography

    Review the cities located within the following longitude and latitude coordinates: 70-80 West Longitude and 30-40 North Latitude. Next, consult your local newspaper or other resource for the weather in these cities. Choose one of the cities found within

    asked by surfsupmel on April 28, 2011
  95. Physics

    An airplane pilot sets a compass course due west and maintains an airspeed of 221km/h . After flying for a time of 0.490h, she finds herself over a town a distance 125km west and a distance 13km south of her starting point. FIND THE MAGNITUDE OF WIND

    asked by Jenna on September 26, 2011
  96. Physics

    A bird wants to rech its nest that is located 53 meters (35 degrees south of west) from where it is perched. If the maximum speed that the bird can fly with respect to the air is 12m/s and there is a wind blowing from a direction of east 35 degrees south

    asked by Carla on October 12, 2015
  97. Physics

    Find the energy necessary to put 5kg , initially at rest on Earth's surface, into geosynchronous orbit. Do I use the formula U=GMm/r G=6.67*10^-11 M=2.5*10^24 m=5 r=41000 Is this sort of right, any help would be greatly appreciated. Do i have to add the

    asked by Malcom on March 31, 2009
  98. algebra

    Write a formula that relates temperature t in degrees Fahrenheit at altitude h (in thousands of feet) and a ground temperature of 65ºF. State any restrictions on h. b. Find the temperature at 11,000 ft above Earth’s surface.

    asked by Hailey on October 16, 2012
  99. algebra

    You must submit your response as a file. An object’s weight depends on its height above the surface of the earth. If a man weighs 190 pounds on the surface of the earth, then the man's weight in pounds (W) x miles above the surface is approximated by the

    asked by darlene on December 1, 2014
  100. Calculus

    one ship (A) is sailing due south at 16 miles per hour and a second ship (B), 32 miles south of A, is sailing due east at 12 miles per hour. At what rate are they approaching at the end of 1 hour?

    asked by Gabby on December 7, 2010