| Subject | Date Asked |
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| science | 12/11/2007 |
Q: what is a physical change and a chemical change
A: A physical change is one in which the state of a substance is changed. for example liquid water ...
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| Polarity and Chromatography | 12/10/2007 |
Q: Our class recently did a lab on chromatography using plant chlorophil and ether as a solvent. One ...
A: Chromatography is a rather large discipline in lab work. A simple chromatography example would be ...
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| Magnesium and Hydrochloric Acid | 6/26/2006 |
Q: For my chemistry coursework i am writing about the reaction between magnesium and hydrochloric acid. ...
A: the Magnisium which is a metal has the chemical energy levels 2 8 2 with the later being the valence ...
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