I need to know the equation on calculating vapor pressur ofasolution. I dont kno

I need to know the equation on calculating vapor pressur ofasolution. I dont know what to plug in for what areas. Thequestionis: Safrole is used as a topical antiseptic. Calculatevaporpressure of a solution prepared by dissolving 0.75 mol ofsafrolein 950 g of ethanol (MM = 46.07 g/mol). P^oethanol =50.0torr at 25^oC.