A mixture of iron, salt and sand can be separated using a magnet, water, a filter and a hot plate. Think about this separation. The separation of this mixture

Explanation:

This is an example of a mixture which can be separated with simple separation techniques based on the physical properties of the mixtures.Magnetism, and filtration and evaporation

Iron is a magnetic material,but salt and sand are not,Therefore,the iron can be separated from the mixture with the use of magnet.

Salt and sand are mixable.But salt is soluble in water,but sand is not.Therefore by adding the sand and salt to water,the salt will  dissolve,in the water(solvent) to form a salt solution. But the sand can be separated out of the solution by  filtration with the  filter paper inserted into a funnel which allows the salt solution to pass through,while restricting the sand.

The sand would be removed by the filter paper,while solution passes through.

The salt solution and some sand residues is placed in evaporating dish and heated at low temperature. The water from the solution evaporates,leaving the salt behind.

the answer is 100% density i've answered this question before and done the quiz myself.