May 23, 2015

Posts by Sami

Total # Posts: 111

Chem ques.
How do I know if a molecule is polar or nonpolar?
November 25, 2007

I mean how many electron groups to determine the shape of it...VSEPR
November 25, 2007

How do I figure out thr number of electron groups in a molecule? I thought it was the number of atoms around the central atom but for some cases it isnt right. For SnCl2, is it 2 electron groups. For H2O2, how would I figure that out, since both oxygens are the central atoms, ...
November 25, 2007

Chem Urgency
Can you explain what the pseudo-gas configuration is? I have the definition but I still dont understand. I have the example.. Sn([Kr] 5s24d105p2) Sn4+ ([Kr]4d10)+4e- I understand the first part but I dont understand the second.
November 24, 2007

Chem Please Help
November 24, 2007

Chem Please Help
I know the short electron config for I is 5s24d105p5....but why do I have to write e- in the first part and also isnt Xe the closest noble gas, why is Kr used instead? In the second part since did an electron become added because Iodine is -1?
November 24, 2007

Chem Please Help
I know how to write elctron configurations but I am having problems with electron config. of main group ions. Problem: Using condensed electron configurations, write reactions for the formation of the common ions of the following element: Iodine (Z=53) Solution: I ([Kr] ...
November 24, 2007

Algebra II
Can you please explain what formula I need to do to solve the following problem: If 3 laps = 5/8 mile, how many laps needs to be completed to run 3 miles? Don't look for "formulas" to do these kind of questions, use ratios, one of the most powerful tools of math ...
August 15, 2007

earth science
you need to word it better
April 14, 2007

personal finance
Donna and Sherman Terrel are preparing a budget for 2003. Donna is a systems analyst with an airplane manufacturer, and Sherman is working on a master's degree in educational psychology. The Terrels do not have any children or other dependents. Donna estimates her salary ...
March 23, 2007

Book Report
My book is "So Super Starry". I can't find any awards won by this book, The author is Rose Wilkins. How can find the awards? Lots of reviews linked in here. I can't find any awards. ...
February 16, 2007

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