Chemical Forums
Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: johnnyjohn993 on October 20, 2014, 06:33:41 AM
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1.375g of Mannitol completely reacted with oxygen thus producing 1.993g CO2 and 0.9519g water what is the empirical formula of Mannitol.
umm I really don't know where to start. pls help
all i know is the oxygen has a mass of 1.5699g
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all i know is the oxygen has a mass of 1.5699g
Really? That's pretty good. How did you get that number. Begin with a balanced reaction. You don't know the formula for a reactant, so put a place holder [mannitol]. But can you see where the carbon dioxide and what came from? How much carbon and hydrogen is that? Careful, mannitol may provide some of its own oxygen.
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I got the answer now, I use the mole concept that is, our reactant have the same total amount of mole to the sum of the moles of the the product :D cool :D