math
exam rose from 20.8 to 21.1 what percent increase was this nearest to the tenth?
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
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