|Jan19-10, 03:36 AM||#1|
Law of conservation of mass question
" In a chemical reaction matter can be neither created nor destroyed "
So does this law only apply to chemical reactions or can matter ever be destroyed or created in any way shape or form?
and do people beleive that something that has been burned can be unburned?
It says that when metal is heated it leaves behind calx and that if you want to remove the calx and combine it with charcoal you can then heat the calx will become metal again, this seems untrue, this is in a science book, not sure whether or not they are talking about a theory that existed at one time or if this is believed to be true now a days that something can be un burned ?
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|Jan19-10, 07:36 AM||#2|
ChemBuddy chemical calculators - buffer calculator, stoichiometry calculator
www.ph-meter.info - ph meter, ph electrode
|Jan19-10, 08:04 AM||#3|
It's how people have produced metal from ore for ten thousand years.
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