Raul

Most popular questions and responses by Raul
  1. Chemistry

    A 0.464 gram sample of a metal, M, reacts completely with sulfuric acid according to: M(s) +H2SO4(aq)=MSO4(aq)+H2(g) A volume of 211 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level.

    asked on March 9, 2013
  2. science

    1. Identify the phase or phases of matter (solids, liquids, and gases) that apply to each statement. More than one phase of matter may apply to each statement. a. Molecules do not move around, but vibrate in place b. Has volume but no particular shape c.

    asked on January 29, 2013
  3. Chemistry

    A 250 g sample of water with an initial temperature of 98.8 c loses 7,500 joules of heat. What is the final temperature of the water ?

    asked on October 3, 2015
  4. Calculus

    The position of a particle moving on a horizontal line is given by s(t)=2t^3-15t^2+24t-5, where s is measured in feet and t in seconds. a: What is the initial position of the particle? b: What is the average velocity of the particle on the interval

    asked on March 4, 2013
  5. Chemistry

    2M +6HCl–>2MCl+3H2 Delta H= -638.0 Kj HClg—>HCl aq= Delta H -74.8 Kj H2+Cl2–>2HCl Delta H -1845.0 Kj MCl3s–> MCl3 aq Delta H -249.0 Kj Use the information above to determine the enthalpy of the following reaction. 2M +3Cl2–>2MCl3 Delta H =???

    asked on March 22, 2013
  6. history

    what do you think contributed to the jump in productivity among american workers during world war 2?

    asked on February 2, 2013
  7. science

    A boat of mass 40 kg is at rest; A dog of mass 4 kg moves in the boat with a velocity of 10 m/s. what is the velocity of boat? a) 4 m/s b) 2 m/s c) 8 m/s d) 1 m/s

    asked on June 19, 2013
  8. Chemistry

    One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) ? FeCl2(aq) + H2(g); (Delta)H°= –87.9 kJ How much heat is liberated at constant pressure if 0.215 g of iron reacts with 40.4 mL of

    asked on March 24, 2013
  9. geometry

    Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?

    asked on May 8, 2013
  10. history

    what conditions were present in the united states after world war 1?

    asked on December 18, 2012
  11. Thermodynamics and Heat Transfer

    A steam pipe is 75 mm external diameter and is 80 m long. It conveys steam at a rate of 1000 kg/h at a pressure of 2 Mpa. The steam enters the pipe with a dryness fraction of 0.98 and is to leave the pipe with a dryness of not less than 0.96. The pipe must

    asked on April 21, 2010
  12. history

    why did the national debt rise so quickly during world war 2?

    asked on February 2, 2013
  13. physics

    A current I = 16 A is directed along the positive x-axis and perpendicular to a magnetic field. A magnetic force per unit length of 0.15 N/m acts on the conductor in the negative y-direction. Calculate the magnitude and direction of the magnetic field in

    asked on March 8, 2010
  14. chemistry

    How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr

    asked on April 29, 2012
  15. Math

    Describe in your own words how to solve a linear equation or inequality

    asked on July 27, 2011
  16. science

    Silvering of mirror is done by a) AgNO3 b) Ag2O3 c) Fe2O3 d) Al2O3

    asked on June 19, 2013
  17. chemistry

    what minimum mass of copper ii nitrate must be added to 70 ml of a .0594 M phosphate solution in order to completely precipitate all the phosphate as solid copper ii phosphate. 2PO4^-3+3Cu(NO3)2-->Cu3(PO4)2+6NO3^-1 I can not come up with the correct answer

    asked on March 1, 2013
  18. 3rd grade math

    A parking lot near the sports field holds a total of 52 vehicles. There are 42 cars parked there now. Half of these cars are red, 10 are blue, and the rest are silver. What fraction of the cars are silver?

    asked on February 27, 2015
  19. science

    The most malleable metal is a) Sodium b) Lead c) Steel d) Gold

    asked on June 19, 2013
  20. science

    Solar energy is mainly caused due to a) Burning of hydrogen in the oxygen b) Fission of uranium present in the sun c) Fusion of protons during synthesis of heavier elements d) Gravitational contraction

    asked on June 19, 2013
  21. Chemistry

    At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)?

    asked on March 22, 2013
  22. history

    how did the navajo code-talkers aid marines in battle?

    asked on February 5, 2013
  23. Maths

    solve the equation: 4cos2*theta + 3cos*theta + 3 = 0 for values between 0 and 180 degrees If that is cosine squared in the first term, you have a quadratic equation. Normally cosine squared would be written in ASCII as cos^2 Theta.

    asked on November 26, 2006
  24. science

    Hydraulic press is based on a) Archimedes principled b) Bernoulli’s solution c) Pascal/s law d) Reynold’s law

    asked on June 19, 2013
  25. science

    4.4 g of CO2 contains how many liters of CO2 at STP ? a) 2.4 litre b) 2.24 litre c) 44 Litre d) 22.4 litre

    asked on June 19, 2013
  26. reading

    Renee has a research paper due in three days. She has set aside two hours to complete this task. What is wrong with this study goal? A. It is not significant and can’t be rewarded. B. The goal is not concrete and specific. C. The time she has allotted is

    asked on April 26, 2013
  27. math

    use mental math to find each value cost of 8 items at $12.98 each

    asked on August 17, 2011
  28. philosophy

    write a 350-700 word response describing how Socrates’, Plato’s, and Aristotle’s philosophies relate to each other

    asked on November 9, 2008
  29. Math

    Write two different numbers that when rounded to the nearest tenth will give you 18.3

    asked on March 9, 2017
  30. 3rd grade math

    Justin took photographs during a trip to the mountains. He used one roll of color film and one roll of black-and-white film. He took 1/3 of the pictures in color during a picnic with his family. If he took 36 pictures in all, how many color pictures did he

    asked on February 27, 2015
  31. science

    The heaviest naturally occurring element is a) Uranium b) Iron c) Silica d) Aluminum

    asked on June 19, 2013
  32. history

    who was the republican candidate who won the election of 1920?

    asked on December 18, 2012
  33. Intermediate Algebra

    Hi another question I have please. Find the midpoint of F A B? A(6,10) B(-20,14)

    asked on April 1, 2012
  34. Chemistry

    which is more concentrated a 1 liter solution containing 30 g of NaCl or a 1 liter solution containing 30g of KCl

    asked on April 4, 2011
  35. algebra

    what does x equal in the equation 3x-35=9x-59

    asked on August 24, 2010
  36. Computers

    What are the particular hardware elements that have a direct memory access device?

    asked on May 27, 2017
  37. Math

    Surface area of each solid .round to THE nearest tenth if necesaria. 6cm 5.2cm 7cm 6c

    asked on April 26, 2015
  38. math fractions

    Rogelio has 3 one-dollar bills, 5 quarters, 4 dimes, 2 nickels, and 9 pennies. What fraction of the coins are quarters?

    asked on February 27, 2015
  39. 3rd grade math

    A pile of index cards has a mixture of white, pink, yellow, red, and blue cards. Some cards are lined, and some are unlined. The total number of cards is 150. 2/5 of the cards are blue, 10 cards are white, and 10 cards are red. Half of the remaining cards

    asked on February 26, 2015
  40. MAth

    Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument?

    asked on February 26, 2015
  41. 3rd grade math

    Two thirds of the musicians in a 16-piece band are girls. the 16 musicians include 12 brass players. what fraction of the band plays brass instrument?

    asked on February 26, 2015
  42. algebra 2

    solve each system by substitution 1. 6x-3y=-33 2xty=-1 2. 2x-y=7 3x-2y=10 3. 4x=8y 2x+5y=27

    asked on January 8, 2013
  43. algebra 2

    solve each system by substitution 1. y=xt1 2x+y=7 2. x=y-2 3x-y=6 3. y=2xt3 5x-y=-3

    asked on January 8, 2013
  44. Intermediate Algebra

    The average cab ride cost per mile(x) is given by f(x)=2x+3.50, where x is miles and f(x) is money. A. Find the cost of a 5 mile ride. B. Find the cost of a 3/4 mile ride. C. How many miles can you go in $50?

    asked on April 1, 2012
  45. Geometry

    wats the areas of a rectangle... base of : 5m high of: (4a+b)m

    asked on October 3, 2011
  46. science

    the length of the string is 9.984cm.What is the length of the string to the nearest tenth of a centimeter

    asked on September 22, 2010
  47. algebra

    how do i graph this quadratic funtion y=x(squared) + 4x - 4

    asked on March 11, 2008
  48. Math

    Familling new carpet and wants to know how much carpert they need , but they olso know that carpet is sold by the square yard. 23feetx9feetx6feet x 3feetx10 feetx19feet

    asked on February 9, 2015
  49. Calculus

    At what value of x does the graph of y=9x^(1/3)+x^2 have a point of inflection?

    asked on March 4, 2013
  50. history

    1.who was the commander of the u.s. navy in the pacific? 2.where did the japanese strike after pearl harbor?

    asked on February 5, 2013
  51. science

    how much work was accomplished by the fall?

    asked on January 9, 2013
  52. us government

    how is compromise and majority rule a part of congressional politics?

    asked on November 5, 2012
  53. complete subject and complete predicate

    this gold ring once belonged to my grandmother

    asked on September 23, 2012
  54. Us History

    The Lousiana Purchase removed a major point of contention between the United States and a European power but left many others. Which areas of possible conflict remained, and what were the sources of these potential conflicts?

    asked on October 16, 2008
  55. I donth Get it !...US History

    Did the differing circumstances of Maryland and Virginia's founding affect the course of their respective development? If so, how?

    asked on September 7, 2008
  56. Us History

    What problems dogged the early settlements of the Chesapeake region?

    asked on September 7, 2008
  57. hystory

    Why did Europeans press westward during this period, instead of concentrating in the more easily defended coastal towns?

    asked on September 6, 2008
  1. math

    I need help please I just got homework and I don't understand are all my problems 7/10 2/5 2/3 3/9 8/22 1/2 16/24 12/29 15/45 I have more but I think its a waste of time for you

    posted on February 21, 2019
  2. Help SS!

    Thank you

    posted on December 19, 2018
  3. vocabulary

    dull

    posted on April 28, 2018
  4. vocabulary

    Cruel

    posted on April 28, 2018
  5. Finance

    543.98

    posted on October 9, 2017
  6. Geometry

    65.3

    posted on September 3, 2017
  7. science

    don't know

    posted on November 14, 2016
  8. Political Science

    yes

    posted on June 9, 2016
  9. FINANCE

    Q1. FV= (1000*.09)+1000= 1090, PV= -1000, n=6, pmt= 140. Cpt I/y= 15.027%. They should be happy because they were making a less (14%) than the 15.027%. Q3. The current yeild is $80 (the coupon) divided by $901.40 (The current market value). Sorry my

    posted on April 30, 2016
  10. Finance

    fv= (1000*.09)+1000= 1090, PV=-1000, n=6, pmt= 140 cpt i/y= 15.027%

    posted on April 30, 2016
  11. Chemistry

    The following system is at equilibrium: A(s)+4B(g)⇌C(g) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. (Add more A)(Remove some A)(Double the

    posted on April 21, 2016
  12. physics

    Polarized light is incident on a sheet of polarizing material and only 22% of the light gets through. Find the angle between the electric field and the transmission axis

    posted on April 4, 2016
  13. science

    I also go to connexus

    posted on February 16, 2016
  14. History on Middle Ages(PLEASE HELP NOW)

    Me TOO.

    posted on February 8, 2016
  15. Maths

    20,00 will be the answer to the question

    posted on November 11, 2015
  16. social studys

    i think is 3

    posted on October 2, 2015
  17. Math

    Oh I'm stupid, I actual answer is the hundredths is divided into 2000 peices, and then you take something and another something, put those poopies together and boomshakalaka!

    posted on September 16, 2015
  18. 4th grade math

    24r1

    posted on May 14, 2015
  19. algebra (check my answers?)

    looks good

    posted on February 27, 2015
  20. 3rd grade math

    36 / 1.3 =27.69(round up) 28 color pictures

    posted on February 27, 2015
  21. 3rd grade math

    11/42

    posted on February 27, 2015
  22. math

    8 x .50 =4 + 8= $12 12 x .20 =2.4 -12= $9.60 9.60 x .15 = 1.44 + 9.60= $11.04 11.04 x .60 = 6.62 -11.04= $4.42 final price.

    posted on February 27, 2015
  23. math

    You have to multiply the 20 min by the number of student in the class which are 25. Then take the minutes and devide them by the number of minutes in an hour. 20 x 25 = 500 minutes 500/60 = 8.3333 (round down) 8 hrs

    posted on February 27, 2015
  24. 3rd grade math

    Thank you Reed and Nour

    posted on February 27, 2015
  25. 3rd grade math

    :) lol. Thanks again

    posted on February 27, 2015
  26. Accounting

    $273.49 x .35= 95.7215 273.49 + 95.7215=$369.21

    posted on February 27, 2015
  27. Accounting

    $5.12 plus 55%= $7.94 price per square yard.(rounded up) 5.12 x .55= 2.816 2.816 + 5.12= 7.94

    posted on February 26, 2015
  28. 3rd grade math

    I mean the 2/3 of the musicians are girls.

    posted on February 26, 2015
  29. 3rd grade math

    Steve, Thank you. THat is part of the question that is not needed to solve the problem.

    posted on February 26, 2015
  30. English

    is this correct parallel sentence: When the movie Star Wars premiered in 1977, it was both surprising and revolution in its special effects.

    posted on January 29, 2015
  31. Math

    Sorry for 2 messages. I accidently hit the send button while i was typing!XD

    posted on September 23, 2014
  32. Math

    the hundredths grid is divided into 100 pieces. Now, you shade a whole grid completely. Then , you shade in 65 pieces of another grid to show 1.65. Then, show another grid with 98 pieces shaded in. Don't forget to put in the subtraction sign!! And now your

    posted on September 23, 2014
  33. Math

    the hundredths grid is divided into 100 pieces. Now, you shade a whole grid completely. Then , you shade in 65 pieces of another grid to show 1.65.

    posted on September 23, 2014
  34. math prob.

    Why is 72 on monday

    posted on December 9, 2013
  35. geometry

    im still not sure on how to do this

    posted on May 8, 2013
  36. geometry

    Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?

    posted on May 8, 2013
  37. Accounting

    $24000

    posted on April 27, 2013
  38. Chemistry

    kj/C not cal/g that's another question I'm working on

    posted on March 22, 2013
  39. Chemistry

    At constant volume the heat of combustion of a particular compound is -3378.0 kj/mol.When 1.563 g of this compound ( molar mass of 126.88 g/mol )was burned temp rose 6.991 C. What's the heat capacity of the calorimeter(calorimeter is constant)? Sorry the

    posted on March 22, 2013
  40. chemistry

    13.5 mols C X(1 m C3H8/ 3m C)=4.5 m c3h8 4.5 miles c3h8 x 11 atoms in c3h8= 49.5 moles of atoms

    posted on March 1, 2013
  41. history

    i need concrete answer please

    posted on February 5, 2013
  42. history

    thank you!

    posted on February 2, 2013
  43. history

    thank you!

    posted on February 2, 2013