URGENT QUESTION CHEMISTRY PLEASE HELP!!!!!!?

A "canned heat" product used to warm chafing dishes consists of a geneous mixture of ethanol, C2H5OH, and paraffin that has an average formula C24H50. What m of C2H5OH should be added to 656 kg of the paraffin in formulating the mixture if the vapor pressure of ethanol at 35�C over the mixture is to be 8 torr? The vapor pressure of pure ethanol at 35�C is 100 torr.