help!! Chemistry. . . . . . what are the properties of mixture?? and the properties of compound??

Question

thanks in advance!! =)
god bless u all

Answer 1

the definitions of those are operational. a mixture can be physically separated into different compounds by various means - fractional distillation, crystallisation, etc. a compound can't be further purified although it can be chemically modified. in terms of atomic theory, a compound consists of identical molecules with fixed ratios between the number of atoms of each type, while a mixture contains a mixture of different molecules.

Answer 2

A CHEMICAL combination of elements is called a ‘COMPOUND’.

Compounds - These are formed from a chemical combination of two or more Elements in definite proportions, as in Common Salt.... Sodium and Chlorine (NaCl).
Water is a compound of Hydrogen and Oxygen gases (H2O)and, these compounds have many different properties to those of the Elements of which they are composed.
The list of compounds found on earth is almost endless. Compounds cannot be separated by mechanical means - only by chemical reaction.

Mixtures - These are physical combinations of any number of materials (or compounds) and have no definite proportion. Mixtures can be separated by mechanical means - such as filtration, solution, distillation, ..etc.

E.g.: A mixture of salt water and sand can first be separated by filtering out the sand particles. The salt water can then be separated by distillation i.e. vaporisation and re-condensation of the water which will leave the salt in the bottom of the distillation apparatus.
Atmospheric Air is a mixture of Oxygen, Nitrogen, CO2 and other gases, all of which can be separated by physical means. (Liquefaction and distillation of air).

Answer 3

compound is a pure substance made of one or more DIFFERENT types of atoms chemically bonded together.
mixture is a substance made of one or more types of atoms physically bonded, can be homogeneous or heterogeneous