khadijah

Most popular questions and responses by khadijah
  1. Chemistry

    How many moles of benzoic acid, a monoprotic acid with Ka=6.4×10^-5, must dissolve in 250mL of H2O to produce a solution with pH=2.04

    asked on April 3, 2017
  2. Arwachine public

    the diagonal of a quadrilateral is 28 cm in length and the perpendicular to it from the opposite vertices are 6.8cm and8cm respectively find the area of the quadrilateral

    asked on December 2, 2015
  3. World History

    What did Michelangelo think of his job painting the ceiling of the Sistine chapel?

    asked on November 10, 2014
  4. Maths help!

    Please help! ln(3e½)

    asked on February 5, 2019
  5. Math

    The sum of 16 terms of an AP is -504,while the sum of its 9 terms is -126.find the sum of its 30 terms

    asked on October 21, 2018
  6. Physics Experiment

    In the experiment Standing Waves,if you continue to lwer the water level after recording l(m) at the first sound resonance at fixed tuning fork frequency, you will hear the sound again but sound gets louder (second resonance). At this point, by what factor

    asked on July 11, 2013
  7. chemistry

    1. calculate the volume of concentrated HNO_3 (68%)that is needed to prepare stock solution 0.25M in 1000mL volumetric flask. (density HNO_3 = 1.513 g/cm^3) 2. from above stock solution, determine volume needed to dilute to 500mL volumetric flask that

    asked on July 10, 2013
  8. Algebra/Trigonometry

    Simplify the expression: 1/y - 1/y-3

    asked on November 18, 2007
  9. Helpp!!! physic...

    In the experiment Standing Waves,if you continue to lwer the water level after recording l(m) at the first sound resonance at fixed tuning fork frequency, you will hear the sound again but sound gets louder (second resonance). At this point, by what factor

    asked on July 13, 2013
  10. Algebra 1

    The midpoint of xy is point m (-12, 5) if the coordinates of x are (3, -3 what are the coordinates of y

    asked on January 18, 2012
  11. World History

    List 4 problems / setbacks of the medieval age?

    asked on November 10, 2014
  12. World history

    Explain the big shift after the medieval age

    asked on November 10, 2014
  13. World history

    Giorgio vocari and Leonard da vanci share what nickname? And why?

    asked on November 10, 2014
  14. physics

    Objects that allow bulbs to light when inserted in a circuit

    asked on December 9, 2010
  15. English

    SIMPLE SENTENCE-> Complex Sentence How can i make a complex sentence, out of these sentences: Tom is a boy. He is eight years old. He goes to school in Philadelphia.

    asked on November 13, 2007
  1. algebra

    A basic cellphone plan costs $20 per month for 60 calling minutes. Additional time costs $0.40 per minute. The formula 𝐶 = 20+0.40 (𝑥 −60) gives the monthly cost for this plan, C, for 𝑥 calling minutes, where 𝑥 > 60. How many calling minutes

    posted on January 8, 2019
  2. Algebra please help out

    A collector has 120 movie posters And 100 band posters. She wants to sell 24 movie posters but still have her poster collection miantain the same ratio of 120:100. If she sells 24 movie posters how many band posters should she sell? Explain.

    posted on January 10, 2017
  3. world geography

    this answer is not up to date

    posted on September 8, 2015
  4. Chemestry

    Sn+2

    posted on August 23, 2015
  5. help me pls geometry

    After drawing four squares, Chen completed this chart showing the length of the sides of each square and the area of each square. According to Chen’s chart, if A is the area and s is the length of a side, what can you conclude is the formula for the area

    posted on December 9, 2013
  6. Chemistry

    metals are .ductile and malleable .shiny .sonorous .have high melting and boiling points .mostly hard .mostly dense every metal have these qualities but there are some exceptions to

    posted on December 26, 2011
  7. physics

    the ans of part (c) is: the fate of the lost energy is that it will make the surroundings warm

    posted on December 26, 2011
  8. Mathematics : Arithmetic Sequence

    common difference=3,1st term=6and general term=3+3n

    posted on June 20, 2011
  9. physics

    objects that allow bulbs to light when inserted in a circuit

    posted on December 9, 2010