Recent content by lucky_star

Never mind. I found out the correct answer. I am sorry if I bother you.

Homework Statement Simplify the following. Write all trigonometric functions in terms of t. Homework EquationsThe Attempt at a Solution I know that: sec(t+2pi)=sec(t) 1+tan(t+3\pi)= 1+tan(t) What about: csc(t-6\pi)? Will it be equal to csc(t). Can anyone please help me with this? Thank you...

Yes, that makes sense to me! Thank so much!

Thanks! Yes, and that's how it get me confused. A solvent is what we have more of, and a solute is what we have less. This appears violating the common rule. I think this is an exception right? what do you think?

Homework Statement Determine the molality of a solution of water dissolved in methanol for which the mole fraction of water is 0.25. Hi all, I just want to ask if water in this problem is a solvent or a solute!? Is water always a solvent even though they say "a solution of water dissolved...

Oh, please ignore this message because I got the answer already. After talking with my friend for awhile, I finally understand how to work this problem out. I am sorry if I ever bother you.

Yes, that what I meant symbolipoint. Thank you everybody! I need to pay more attention on how I write it properly.

First Order Decomposition -> % of compound. Please help! Homework Statement In a first order decomposition, the constant is 0.00313 sec-1. What percentage of the compound has decomposed after 7.17 minutes? Homework Equations rate = ln[A]o - ln[A]t = kt The Attempt at a Solution I...

Thank you!

Hi, I have a log problem. Can anyone please check if I did it correctly!? Homework Statement Evaluate the following using the laws of logarithms. Simplify your answer as much as possible. (Note: These should be done without a calculator). [log(5)+log(2)] / log2(cubic root of 10) =...

I don't know if this is the right place to post this ebook. Please move it to the appropriate section, thanks. American BookWorks Corporation “CliffsTestPrep PCAT: 5 Practice Tests” Cliffs Notes | 2006-03-27 | ISBN: 0764595865 | 304 pages | PDF | 2,2 MB Your guide to a higher score on...

You're welcome!

Try this link: http://chemistry.dortikum.net/en/home/ Click the download link on the left panel of the website. It's a very cool and FREE application. Hope this helps.

Oh, Thanks again :)

Hi Nick, You have an Oxygen molecule and it asks you for the delta Hf of Oxygen atom ONLY. So, i would suggest you to halve the bond energy of O2. Any other suggestions or am I right?