Thursday
December 12, 2013

# Posts by Erica

Total # Posts: 486

Chemistry
thank you so much for the explanation

Chemistry
I need help please I am so confused. How much dry solute would you take to prepare each of the following solutions from the dry solute and the solvent? I know the MM of KCl is 74.55 107g of 0.535m KCl

Chemistry
thank you so very much

Chemistry
To what volume should you dilute 43.5mL of a 4.20M KI solution so that 24.0mL of the diluted solution contains 2.80g of KI? Please if you can explain it to me I am so confused.

Chemistry
A sample of 2.00 mol O2 (assumed perfect) is originally confined in a 20.0L at 273K and 2.24 atm. it undergoes reversable adiabatic expansion until the volume has increased by a factor of 3. Calculate q, w, delta u, delta h, and delta t. Cv=7/2R and cp=5/2R

calculus
Find the limit if it exist lim t-->pi/3 (tan(t)/t)+1

calculus
Find a delta for any epsilon given: x^2+x-6/x+3 and x0=-3

chemistry
write a step by step procedure explaining how you will separate the sand, potassium chloride, and iron

math
what would the following equation be in vertex form. y=-9x squared+72x+81. I have tried for hours and i cannot figure it out

Physics
The left ventricle of the heart accelerates blood from rest to a velocity of + 29.8 cm/s. (a) If the displacement of the blood during the acceleration is + 2.68 cm, determine its acceleration (in cm/s2). (b) How much time does blood take to reach its final velocity?

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