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pyro valance

#1 CCH Concepts

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Posted 06 December 2011 - 05:03 AM

i was just reading about using the molar mass and valance to work out strochiometic rations. i was working through some examples but was a cant find is how to calculate the valances of molecules.

for instance KClO4 has a valance of -8, NH4NO3 has a valance of -2, i know this because these values were provided, but how are they calculated? and what about for more complex fuels like heximine etc?

#2 Mumbles

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Posted 07 December 2011 - 03:38 AM

Are you thinking about formal charge? By the way, nothing in KClO4 has a valence of -8, nor does anything in NH4NO3 have a valence of -2. You may want to find a better source