СН3 – СН = СН2 + НCl → help help help help

СН₃ – СН = СН₂ + НCl → CH₃-CHCl-CH₃

Alkenes are unsaturated hydrocarbons that have a -C = C- double bond.

If there are 2 double bonds it is called an alkadiene, and if there are three double bonds it is called an alkatriene

General formula for Alkenes: CnH2n

addition reactions to alkenes follow Markovnikov's rule. in the addition reaction of hydrogen halide (HX), the halogen atom (X) will be bonded to the carbon atom that binds less H atom.

If the double-bonded carbon atom has the same number of H atoms attached to it, then the X atom will tend to be attached to the carbon atom with the longer alkyl group.

Addition reaction of propene compounds with HCl

СН₃ – СН = СН₂ + НCl → CH₃-CHCl-CH₃

CH - this carbon atom binds fewer H atoms, so Cl is bonded to this bond

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.