Mass of candle 0.72 g before burning. What is the mass of the products of this reaction? Would that be the same thing as weighing the candle again (the mass is 0.27 g after burning)?
Refer to explanation
Reweighing the candle before and after burning just shows how much fuel was burnt.
Typical candle wax is an alkane such as hentriacontane, so write a chemical formula for the combustion of this alkane.
Work out the moles for this alkane.
The mole ratio of the alkane to
Multiply the moles of
Hence for water, do 0.0511 moles times by its formula mass, 18.
#0.0511*18= 0.92g of water.
(I may have overcomplicated it a bit)