What is the difference between and Alkane and an Alkene

Both are molecules which contain only Carbon and Hydrogen moleculesAlkanes do not contain any carbon - carbon double bonds - all bonds are single - therefore the molecules is known as saturated the empirical formula for this molecule will be CnH2n+2 Alkenes contain contain at least one carbon - carbon double bond. Therefore the molecule is unsaturatedthe empirical formula for this molecule will be CnH2n