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1.A mixture is created when two or more different substances are physically combined and can be separated back into its original substances. A chemical reaction occurs when two or more substances are combined to form a new substance and cannot be separated back into its original substances.

2.By definition, a pure substance or a homogeneous mixture consists of a single phase. A heterogeneous mixture consists of two or more phases. When oil and water are combined, they do not mix evenly, but instead form two separate layers.

3.Particles in a suspension are usually more than 1,000 nm, while those in a colloid range from 1-1,000 nm. ... Colloids are able to scatter light, but suspensions cannot transmit light. Particles in a suspension can be seen by the naked eye, but those in a colloid must be viewed using a light microscope

4.Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material. Filtration separates solids of different sizes.

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ANSWER:

1.A mixture is created when two or more different substances are physically combined and can be separated back into its original substances. A chemical reaction occurs when two or more substances are combined to form a new substance and cannot be separated back into its original substances.

2.A homogenous mixture is that mixture in which the components mix with each other and its composition is uniform throughout the solution. A heterogenous mixture is that mixture in which the composition is not uniform throughout and different components are observed.

3.A suspension is a heterogeneous fluid containing solid particles that are sufficiently large for sedimentation. The solids get dispersed throughout the fluid through mechanical agitation with the use of certain suspending agents. Example: Chalk-water mixture, flour in water, milk of magnesia.A colloid is a kind of solution in which the size of the solute particles is intermediate between those in true solution and those in suspension. Examples of colloids are mayonnaise, milk, butter, gelatin, and jelly.

4.Chromatography involves solvent separation on a solid medium. Distillation takes advantage of differences in boiling points. Evaporation removes a liquid from a solution to leave a solid material. Filtration separates solids of different sizes.

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