Answer:
compounds have a definite ratio for bonding (H20,where 2 hydrogen atoms combine with 1 oxygen atom) .In a compound the bonding takes place at the atomic level where the atoms bind. they cannot be separated physically they need to be separated chemically.
mixtures do not have a definite ratio at all(Fe2O3·nH2O which is rust is a mixture because the ratio of water is not definite with the ratio of Fe2O3.which is why it is denoted as
nH2O.where n can be any number ( say 1,30,40 etc) this means that any number of water molecules will bind with Fe2O3.)in a mixture the bonding takes place at a molecular level.they can be separated physically