Total # Posts: 111
How does an ionic bond form between zinc and oxygen? Zn has two electrons in its outside shell and wants to give them away (which makes the next inner shell now the outer shell but is is full with eight electrons). Oxygen has six electrons in its outside shell and want to gain...
November 24, 2006
What are the certain conditions when ionic compounds conduct an electric current? Why are ionic compounds not always used as conductors? Ionic compounds conduct an electric current when the ions are free to move about. This usally means they are in solution form (as ions) or ...
November 24, 2006
How does an ionic bond form between zinc and oxygen? Zn has two electrons in its outside shell and wants to lose those two. Oxygen has six electrons in its outside shell and wants eight; therefore, oxygen takes the two electrons form Zn making the Zn with a +2 charge and ...
November 20, 2006
The more reactive an atom, the higher its potential energy. Which atom has higher potential energy, neon or fluorine? Neon is hardly reactive at all. When it reacts, it will make news. Fluorine is a very reactive element. It is very difficult to keep it from reacting, often ...
November 19, 2006
How could you make the reaction Cu(NO3)2 + NaCO3 -- CuCo3+NaNO3 balanced? You have the formula for sodium carbonate wrong> Na2CO3 The carbonate ion is -2 valence, and Na is +1. Now it will balance.
November 5, 2006
what happens when solids, liquids, and gases are heated/cooled? Most expand if heated; contract if cooled. Solids, if heated high enough will melt and the liquid may occupy less volume than the solid. Likewise, liquids, if heated high enough, will boil and the volume of the ...
October 9, 2006
What instrument is used to determine the mass and relative ambuandaces of small atomic particles? You may be thinking of the mass spectrometer. I'm not sure how small you are talking about but the mass spec is used to determine atomic masses and relative abundance of the ...
September 26, 2006
I do not understand why Dmitri originally doubted that Smerdyakov murdered Fyodor but later changed his mind and thought Smerdyakov murdered Fyodor. Be sure to go into www.sparknotes.com/lit and find this book under the B's -- then read the section called Analysis of Major...
September 14, 2006
How are gases and vapors different? Most use gases and vapors interchangeably. I looked up both words in my copy of Webster's and found gas listed vapor as a synonym and vapor listed gas as a synonym. However, some of the definitions for vapor listed "particles as in ...
September 9, 2006
How do you find the domain and range of an equation? Since this is not my area of expertise, I searched Google under the key words "domain range equation" to get these possible sources: http://education.yahoo.com/homework_help/math_help/problem_list?id=...
August 28, 2006
Since the SI unit for temperature is Kelvin, why is the Celsius scale most often used in the science labs? I don't know that it IS the most often used. For example, almost all of the calculations require changing from C to K (gas law problems, and almost all others EXCEPT ...
August 15, 2006