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July 31, 2014

Homework Help: Chemistry

Posted by Anya on Thursday, December 13, 2012 at 1:10am.

Is this done right?

White phosphorous, P4, spontaneously bursts into flame in Oxygen gas. if 6.5 g of white phosphorous reacts completely with oxygen to form 11.54g of a phosphorous oxide, what is the empirical formula of this oxide?

this is what i did:

total = 11.4 g , P4 = 6.5 g , therefore O2= 5.04 g

converted P4 and O2 to moles and divided by the smallest # of moles (which was moles of P4= 0.0525)

so the empirical formula would be PO3


however this isn't one of the options for the answers :S

did i do smthg wrong?

thanks for help in advance!

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