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Old March 22nd, 2006, 13:37
Carib eyez Carib eyez is offline
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[quote="asutoshsahu"]In Na2S4O6
Na +1
O -2
Then 1x2+4S+(-2)x6=0
Soving this we get O.N. of S=2.5[quote]

That's how I work it out thusthe answer is 2.5