Thursday
May 23, 2013

Posts by Bianca


Total # Posts: 169

math
Gina cut a piece of ribbon into 3 equal pieces. Then she cut 2 inches off one piece to make a piece 3 inches long. How long was Gina's original piece of ribbon?

science
please give me 10 examples of suspension

6th grade science
i actulay think it is b. :)

6th grade science
i think itg is c. :)

Chem II
Calculate the pH of 500. mL of 0.100 M acetic acid, CH3COOH, which also contains 0.100 mole of sodium acetate, NaCH3COO. How do you set this up step by step?

Chem II
Is it something like PH=pKa +log [base]/[acid] 3.40=?? How do I find the pKa?

Chem II
Find the mass of sodium formate that must be dissolved in 200.00cm^3 of a 1.0M solution of formic acid to prepare a buffer solution with pH=3.40? I have no clue how to work this out. Please help me.

Chem II/College
Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of water is 40.7 kJ/mol. How do you solve this?

Math
The perimeter of a rectangular soccer field is 20/3 meters. If the width of the soccer field is the reciprocal of the length, find the dimensions of the soccer field.

Math
If a certain number, x, is added to 4/(x+1), the result is 3. Find the number.

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