khadijah
Most popular questions and responses by khadijah
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 
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 
World History
What did Michelangelo think of his job painting the ceiling of the Sistine chapel?
asked on November 10, 2014 
Maths help!
Please help! ln(3e½)
asked on February 5, 2019 
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 
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 
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 
Algebra/Trigonometry
Simplify the expression: 1/y  1/y3
asked on November 18, 2007 
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 
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 
World History
List 4 problems / setbacks of the medieval age?
asked on November 10, 2014 
World history
Explain the big shift after the medieval age
asked on November 10, 2014 
World history
Giorgio vocari and Leonard da vanci share what nickname? And why?
asked on November 10, 2014 
physics
Objects that allow bulbs to light when inserted in a circuit
asked on December 9, 2010 
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

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 
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 
world geography
this answer is not up to date
posted on September 8, 2015 
Chemestry
Sn+2
posted on August 23, 2015 
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 
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 
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 
Mathematics : Arithmetic Sequence
common difference=3,1st term=6and general term=3+3n
posted on June 20, 2011 
physics
objects that allow bulbs to light when inserted in a circuit
posted on December 9, 2010