Wednesday
June 19, 2013

# Posts by Megan

Total # Posts: 854

chemistry
What is the molarity of each kind of ion in a solution of magnesium chloride that contains 29.0 g of magnesium chloride dissolved in enough water to make 1.73 L of solution? MgCl2 Mg2+ + 2 Cl-

ap chemistry
A voltaic cell made of a Cr electrode in a solution of 1.0 M in Cr 3+ and a gold electrode in a solution that is 1.0 M in Au 3+ . a) Provide the half cell reactions for each of the electrodes. b) Which is the anode and which is the cathode? How did you decide? c) Give an overa...

Geometry
Find the center of the circle using the equation provided. Please show work! x^2 + y^2 = 16

geometry
Give an example of an infinite set.

physics
Elena, for some reason I'm getting an answer of -3 (8.00 x 10^-12) x (d-x)^2 = (6.00 x 10^-12) x (x^2) (d-x)^2/x^2 = 7.5 x 10^-1 (d-x)(d-x)/x^2 = 7.50 x 10^-1 x^2-x+0.25/x^2= 7.50 x 10^-1 then I get x = -3 Can you help! I'm not sure where i am going wrong.

physics
Two spheres with charges of 4.00nC and 3.00nC are placed 0.500m apart. At what point between the two charges must the third charge of 2.00cN be placed so that the net electrostatic force acting on this charge is zero?

Precalc
Evaluate Tan[(3pi-70000pi)/2]

BioChem
Write the chemical equation for the reaction that occurs when you add NaOH solution to NaH2PO4/Na2HPO4 buffer solution

chemistry
Hydorgen peroxide may be prepared by the following reactions: 2NH4HSO4 ---> H2+(NH4)2S2O8 (NH4)2S2O8+2H2O ----> 2NH4HSo4+H2O2 What mass of ammonium hydrogen sulfate, Nh4HSo4 is initially required to prepare 2.00 mole of H2O2? What mass of H2O is required? I have checked ...

Chemistry
What is the equilibrium equations that result when solid NH4F is dissolved in sufficient water to produce 5.0 mL of 0.5M NH4F solution? How would the addition of 5 drops of 0.1M HCl affect the equilibrium system. Give an explanation. How would the addition of 5 drops of NaOH a...

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