Most popular questions and responses by Na
  1. Chemistry

    Write the balanced chemical equation for the reaction of the weak acid HCN with water. Include the phase of each species.

    asked on September 3, 2015
  2. chemistry

    In the following reaction, how many grams of lead(II) nitrate Pb(NO3)2 will produce 425 grams of sodium nitrate (NaNO3)? Pb(NO3)2(aq) + 2 NaBr(aq) PbBr2(s) + 2 NaNO3(aq) The molar mass of Pb(NO3)2 is 331.21 grams and that of NaNO3 is 85 grams.

    asked on December 1, 2014
  3. math

    A circular pond 26 yds in diameter is surrounded by a gravel path 2 yds wide. The path is to be replaced by a brick walk costing $50 per square yard. How much will the walk cost?

    asked on January 12, 2016
  4. physics kinematics

    A river flows at 2m/s the velocity of a ferry relative to the shore is 4m/s at right angles to the current what is the velocity of the ferry relative to the current?

    asked on December 31, 2015
  5. Math

    45 divided by 5/11 4/7 divided by 7/8 2 1/2 divided by 4 5/7x =140 Please help Thanks

    asked on December 26, 2012
  6. Math


    asked on November 3, 2012
  7. Chemistry

    How can we recover NaNO3 from an unsaturated solution

    asked on September 25, 2017
  8. science

    what volume of benzene ( C6H6 d=0.88g/ml molar mass = 78.11) is required to produce 1.5*10^3 kj of heat

    asked on June 30, 2010
  9. physics

    A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.6 m/s and her body makes an angle of 84 degrees with respect to the horizontal surface of the water .

    asked on September 11, 2010
  10. science

    The cider is heated from an initial temperature of 4°C to a final temperature of 65°C. The steam enters the heat exchanger as 50% quality steam and exits as water condensate at 85°C. Calculate the mass of steam required to heat 150 kg of cider. (For the

    asked on July 16, 2014
  11. physics in kinematics

    ebo throws a ball in the air it's velocity at the start is 18m/s at an angle of 37° to the ground express the initial velocity in component vector form?

    asked on December 30, 2015
  12. Physics

    A 1.70-kg block slides on a rough, horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it a distance of 11.3 cm before coming to rest. If the coefficient of kinetic friction between the block and the surface is μk = 0.534,

    asked on October 26, 2012
  13. Error Analysis

    Please help me find the wrong grammar, word use and sentences structure for me.. *It's not essay. It's my homework from teacher to modify What can you do to reduce global warming in Thailand Global warming is big problem for the word. Now, the word want

    asked on April 19, 2015

    An electron is located on a pinpoint having a diameter of 2.04 µm. What is the minimum uncertainty in the speed of the electron?

    asked on April 20, 2012
  15. chemistry

    Mr. Arswan iss preparing a mixture for a science experiment. He measures 10.5 grams of wood shavings, 150 grams of iron filings, and 18.50 grams of salt. What is the total mass of Mr. Arswan`s mixture? A 30.5 grams B 179 grams C 150.5 grams D 17.9 grams

    asked on October 6, 2013
  16. algebra

    Jacob and Robert work at a restaurant. On Friday night, Jacob earns $12 per hour and Robert earns $7.50 per hour in addition to $15 in tips. Which graph shows the amount of money earned by Jacob and Robert?

    asked on December 19, 2017
  17. Algebra

    3.To estimate animal populations, biologists count the total number of animals in a small section of a habitat. The total population of animals is directly proportional to the size of the habitat (in acres) polled. a.Write an equation using only one

    asked on March 18, 2009
  18. Physics Help

    A 3.50-inch floppy disk in a computer rotates with a period of 2.02E-1 s. What is the angular speed of the disk?

    asked on November 30, 2012
  19. physics

    A drag racer accelerated from 0 to 475km/h in 4.88 s. Assuming a constant acceleration, how far did it travel?

    asked on November 8, 2011
  20. physics

    a butterfly at eye level is 20 cm in front of a plane mirror. you are behind the butterfly, 50 cm from the mirror. what is the distance between your eyes and the image of the buterfly in the mirror?

    asked on October 31, 2009
  21. Math

    The scale on a map is 1 in: 4 miles. Find the actual distance in miles for each length on the map. 1/ 2 in. Answer: d=8 2/ 7.2 in. Answer: d=288 3/ 3.5 in. Answer: d=140 4/ 11 in. Answer: 44 Write the ratio as a scale in simplest form. 3cm\15cm Answer: 1/5

    asked on March 1, 2017
  22. Math

    Sid wrote 541,309 on his paper. Using numbers and words,explain how the number would change if he exchanged the digits in the hundred thousands and ten places

    asked on September 14, 2016
  23. english grammar

    a or b) for each number as well as an explanation of why you made that choice. just need help explaining why? Answer A 4a. John has become a rather good actor. 4b John has became a rather good actor. Answer A 5a. Some athletes have taken drug tests to

    asked on January 9, 2012
  24. development

    To what extent does development mean more than than economic growth? Development of what? Please clarify your question and tell us what you think the answer is. We'll be glad to critique your ideas.

    asked on February 2, 2007
  25. Algebra

    Determine the measure of each exterior angle. The triangle looks like an upside down A with one line running longer at the point. The inside angles are A- 50 and in the next corner 75. In the bottom of the A-letter I need to solve for C and A and the extra

    asked on March 4, 2016
  26. Calculus

    evaluate each of the following integral:- I= ∫((x^2+ 1)/(x^4+ 1))dx Y=∫(sinhxcoshx)dx/√(sinhx^4+coshx^4)

    asked on December 21, 2014
  27. English

    Write the vocabulary word from the word box that matches each idea. Communicate - flick - alert- signal - chatter - grooms. 1/ make neat and clean . Answer: grooms 2/............. to tell a person or animal something. Answer: communicate 3/

    asked on February 15, 2014
  28. physics

    find the distance light travels from its starting point, S, to its final point, F, by traveling two different paths: Note: you'll need to know Pythagorean Theorem.

    asked on November 11, 2009
  29. geometry

    find the 2 missing patterns 1,2,6,24,120,.. 2,4,8,16,32,.. 1,1/4,1/9,1/16,1/25,.. 1,1/2,1/3,1/4,..

    asked on August 25, 2008
  30. geography

    what is a narrow arm of the sea at the mouth of a river where the ocean tide meets the river current called?

    asked on September 15, 2007
  31. ashford university

    Which of the following methods would be most successful for encouraging self-regulation in young children?

    asked on May 21, 2016
  32. Math

    Subtract money amounts 1/ Aidan has $5.00 to buy a can of tennis balls that cost $3.79. How much change should he get back? 2/ Sylvia has $10.00 to buy a hairbrush that cost $ 6.88. How much change should she get back?

    asked on February 19, 2014


    asked on January 31, 2011
  34. algebra

    f(x)=x+2x+3 and x=1&6

    asked on August 31, 2009
  35. geometry

    find the 2 missing patterns 1,2,6,24,120,.. 2,4,8,16,32,.. 1,1/4,1/9,1/16,1/25,.. 1,1/2,1/3,1/4,..

    asked on August 25, 2008
  1. Chemistry.

    C- O is non polar

    posted on March 2, 2018
  2. health

    BBB is correct, thx:)

    posted on February 14, 2018
  3. english


    posted on January 31, 2018
  4. Finite Mathmatics


    posted on November 15, 2017
  5. probability


    posted on September 18, 2017
  6. Education technology

    1) b 2) a 3) a

    posted on April 14, 2017
  7. Math

    Oh, I'm sorry. I forgot to write it as a new Question.

    posted on March 1, 2017
  8. Math

    Write the ratio as a scale in simplest form. 3cm / 15cm Note: /= as fraction

    posted on March 1, 2017
  9. Math

    2/ 28.8 3/ 14 5/ I don't know

    posted on March 1, 2017
  10. Math

    What are true answers .

    posted on March 1, 2017
  11. Chemistry

    i dont know

    posted on November 3, 2016
  12. calculus

    no I am trying to teach myself. however would the answer be 3843.33

    posted on May 8, 2016
  13. calculus

    but where did you the "1/2 and 1/3" from?

    posted on May 8, 2016
  14. Probability Questions - STAT

    0.2/0.8=0.25 for test positive/nodisease

    posted on January 6, 2016
  15. 11th grade physics

    physics dynamics

    posted on December 31, 2015
  16. spanish

    actually #5 is incorrect and so is #6, I just tried those two and it came up as wrong

    posted on September 12, 2015
  17. Calculus


    posted on December 22, 2014
  18. phi 208

    Individual proprietors of small businesses

    posted on July 1, 2014
  19. Math

    Q:1 and 2 3/4= 6/8=9/24=12/16=15/20=18/24........ 2/5=4/10=6/16= 8/20= 10/25 My answers true or false

    posted on February 19, 2014
  20. physics

    a. 5 b. ? c. 3 d. ?/?

    posted on October 9, 2013
  21. Chemistry...Help!!

    this answer is incorrect. The following should be switched: 0.049 L/0.03368 mole =1.455 molar should be 0.03368 mol/0.049 L =0.6873 molar the rest of the steps are correct but you would need to substitute the above number in for the remainder of the

    posted on September 18, 2012
  22. ponctuation, mechanisme, and writing

    a or b) for each number as well as an explanation of why you made that choice. just need help explaining why? Answer A 4a. John has become a rather good actor. 4b John has became a rather good actor. Answer A 5a. Some athletes have taken drug tests to

    posted on January 9, 2012
  23. math

    “Perpetrators”—students who reported at least one violent act (hitting, shoving, etc.) against their partner in their current or most recent relationship—and

    posted on January 13, 2011
  24. 7th grade Math

    I think it is 170 because the second person has the first handshake with the new teacher and its like one less.The answer is 170.

    posted on October 4, 2010
  25. chemistry

    i'm working on the same project as you. i'll post my answer once i get to this question.

    posted on September 20, 2008