Saturday
December 7, 2013

# Posts by Bianca

Total # Posts: 189

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.

Math
The sum of the reciprocal of 5 and the reciprocal f 7 is the reciprocal of what number?

Statistics
Given that the Number of Grantees of a Driver's License in a small country in the month of April are .... 1,200 for professionsl 3,350 for non-professional 2,450 for students If you want to make a study of the correlation between driving habits and number of vehicular acci...

Science (Microscope)
Explain why some parts are in focus and some part are out of focus when you are trying to focus an object under the microscope.

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