Homework Help: chemistry

Posted by auburn on Thursday, May 17, 2012 at 2:30pm.

a candle was 27.9 grams. the mass of the candle that burned in 3 minutes was 7.2 grams.

a) How many moles of wax were in the candle before it burned ?

b) How many molecules are in the candle before it burned?

c) How many moles of wax were used up during the burning?

d) How many molecules were used up during the burning?

e) How long would it take to burn 1 mole of candle?

chemistry - DrBob222, Thursday, May 17, 2012 at 2:32pm
You need to show some kind of work OR explain in detail exactly what you don't understand.
chemistry - auburn, Thursday, May 17, 2012 at 2:39pm
how do you turn grams into moles/molecules?
chemistry - DrBob222, Thursday, May 17, 2012 at 3:52pm
mols = grams/molar mass
mols = #molecules/6.022E23
chemistry - auburn, Thursday, May 17, 2012 at 4:03pm
thank you

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