Most popular questions and responses by Yesenia
  1. Chemistry

    A reaction of the form aA-----products is second-order with a rate constant of 0.225 L/(mol/s). If the initial concentration of A is 0.293 mol/L, what is the molar concentration of A after 35.6 secs?

    asked on September 26, 2010
  2. chemistry

    what is the delta u when 1.00mol of liquid water vaporizes @ 100C? The heat of the vaporization, delta h, of water @ 100C is 40.66kj/mol

    asked on November 17, 2010
  3. statistics

    How heavy a load (pounds) is needed to pull apart pieces of Douglas fir 4 inches long and 1.5 inches square? Here are data from students doing a laboratory exercise: 22565 28373 25826 26468 27508 23401 24998 32436 25405 29235 29679 33661 27775 28517 30371

    asked on March 1, 2011
  4. physics

    A batted baseball leaves the bat at an angle of 35.0 degrees above the horizontal and is caught by an outfielder 370 ft. from home plate at the same height from which it left the bat.

    asked on September 22, 2011
  5. earth

    The capital letter(s) that label a rock unit (e.g., KJk) on a geologic map represents the rock unit's

    asked on July 5, 2013
  6. Statistics

    The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 119, and the standard deviation is about

    asked on March 1, 2011
  7. statistics

    The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' study habits and attitudes toward school. Scores range from 0 to 200. The mean score for college students is about 115.8, and the standard deviation is about

    asked on March 1, 2011
  8. Math

    If I listen to a 3 minute and 19 second song on repeat for 12 hours how many times did the song play?

    asked on September 6, 2019
  9. physics

    A ray of light passes from air into water. The incident angle is 30o. Find the index of refraction of water if the angle of refraction is 22o. Ans. 1.333

    asked on November 16, 2010
  10. Math

    A package weights 96 ounces what is the Weight of the package in pounds

    asked on February 12, 2019
  11. physical science

    push a box across a tablewith a force of 5 newtons and the box moves 0.5 meters. how much work is been accomplished?

    asked on January 30, 2013
  12. math

    Susan’s test scores are 93, 85, 88, and 90. What does she need to score on the next test to raise her average to 90?

    asked on July 21, 2014
  13. algebra

    How do i solve 3x+(2x-5)= 13-2(x+2)

    asked on October 30, 2010
  14. MULtiplying Binomials

    WHATS (3N+2)(N+3)

    asked on December 6, 2009
  15. life skills

    It is important to make sure that any person selling you a car has? A. physical possession of the vehicle. B. informed the motor vehicles department of the intention to sell the vehicle. C. legal title to the vehicle. D. a good reputation for honesty.

    asked on June 5, 2012
  16. ALGEBRA 1

    what is 2(x+1)+2=3x-4

    asked on August 23, 2009
  17. biology

    when a black angus has ofspring that come out brown or just spotted brown..what is the cause of it?

    asked on October 21, 2007
  18. math

    39% of 19

    asked on March 9, 2014
  19. Math

    The ratio of the weight of Philipe's gerbil to the weight of Dana's gerbil is 4:7. When both gerbils are placed on a scale, the scale reads 99 ounces. how much does Dana's gerbil weigh?

    asked on January 23, 2012
  20. science

    i want to know what is the cause of lack of oxygen in blood.

    asked on April 14, 2009
  1. math

    Catherine, Please show your work. Damon, from (n-24) - (2/7)(n-24)=n/2, how did you get "14?" What made you decide to multiple each side by 14?

    posted on June 23, 2019
  2. statistics


    posted on April 26, 2019
  3. Math check?

    Use a graphing calculator or other technology to answer the question. Which quadratic regression equation best fits the data set? A. yˆ=0.728x2+20.213x+179.246 B. yˆ=0.728x2−20.213x+179.246 C. yˆ=179.246x2−20.213x+0.728 D. yˆ=0.728x2+0.564x+179.246

    posted on April 1, 2019
  4. World history; Check:P

    hey I have a question to the one who wrote those few sentences?

    posted on January 25, 2019
  5. world history

    whats the answer

    posted on January 17, 2019
  6. Ancient history

    hey whats the answer?

    posted on January 9, 2019
  7. Algebra

    its 3.5 hours A.

    posted on September 6, 2018
  8. Math. (Please Help)

    d 281,059.48

    posted on May 8, 2018
  9. math


    posted on December 5, 2016
  10. physics

    I am very confused with this problem and as to how the answer is found but the correct answer is the following boat a wins by 42km and the average velocity of the winning boat is 0(zero). I got it right by practicing a webassign problem.

    posted on October 4, 2015
  11. physics

    general formula: V=distance/time in this problem we are looking for the time, so adjusting our general formula we need to get time as our isolated variable. time=distance/velocity time: ? distance: 1.8m velocity: 100m/s therefore: t=1.8m/100m/s using your

    posted on October 4, 2015
  12. 5th grade math

    120 people were at a park.75 people many people are at the park now?

    posted on September 30, 2014
  13. College Chem II


    posted on October 2, 2013
  14. algbrea

    a triangle has a perimeter of 23 in. the medium side is 3in more then the shortest side and the longest is twice the shortest side fine the shortest side?

    posted on August 24, 2012

    what is the mat method?

    posted on April 4, 2012

    its okay

    posted on May 9, 2011
  17. chemistry

    the answer in the back of the book says 37.56 KJ

    posted on November 17, 2010
  18. 8th grade


    posted on January 7, 2010
  19. Multiplying Binomials

    WHATS (3N=2)(N+3)

    posted on December 6, 2009
  20. science

    I am suppose to write different examples of plasma, liquid, gas ,and solid and so far I got that water is a liquid and I put you can change the volume or the shape.

    posted on October 29, 2007