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posted by Nae Sunday, January 30, 2011 at 6:56pm.
How many moles of O atoms are there in a sample of 86g sucrose (C12H22O11)?
342 grams/mol (add up 12C +22H +11O) 86/342 = .251 mol for every mol of sucrose there are 11 moles of O 11*.251 = 2.77 mol of O
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