Thursday
December 5, 2013

# Posts by Zach

Total # Posts: 294

Physics
an 88kg cardboard box is being pulled along a level floor. the coefficient of static friction between the box and the floor is 0.23, and the sliding friction is 0.12. What is the weight of the box? What force is needed to start the box moving? What force is needed to keep the ...

Chemistry
I have done the calculation for this multiple times and I keep getting over 100% for the sodium carbonate in soda ash. I have no idea what I am doing wrong. I did it the way that you explained.

Chemistry
I used bromophenol blue as the indicator, and the molarity of HCl is 0.2M.

Chemistry
I titrated 0.25g of soda ash mixed with 25mL of deionized water and it took 43.7mL of hydrochloric acid to complete the titration. I am trying to figure out how to find the moles of sodium carbonate in the soda ash and then the percent of sodium carbonate in the soda ash. How ...

future job
thanks

future job
what do thet mean when they say Outlook:stable,increasing Job Openings: large number and very small number

Chemistry
I am trying to figure out how to calculate the reaction rate. In my question the reaction rate is: 1/2x molarity of sodium thiosulfate/reaction time Then I have to compare the rates of runs 1-3 and determine the orders of the reaction. Do I only find the reaction rate based of...

Chemistry
So I would multiply 3% by 20 mL which equals 0.6. Then I would divide 0.6 by 30% to get the volume of 30% hydrogen peroxide?

Chemistry
How would I find the volume of 30% hydrogen peroxide solution from 20mL of 3% hydrogen peroxide solution?

chemistry
Explain why the urea in particular, or amides in general, are much weaker bases than amines?

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