a hydrocarbon is burnt in 175cm3 of oxygen. The mixture is cooled. The volume of the remaining gasses is 125cm3. The carbon is removed. This leaves 25cm3 of unreacted oxygen.
*Determine the volume of oxygen used
* Determine the volume of carbon dioxide formed
*Deduce a possible formula for the hydrocarbon
* Write a balanced equation for the reaction of this hydrocarbon with oxygen
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