Determine the classes of matter described by each question. Each question may describe more than one class of mater. In which of these classes must two or more substances be present?Which of these classes could not possibly have a variable composition?For which of these classes is separation into simpler substances by physical means possible? Answer bank: pure substances, homogenous mixtures, heterogenous mixtures

Question
Asked Sep 24, 2019
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Determine the classes of matter described by each question. Each question may describe more than one class of mater. 

In which of these classes must two or more substances be present?


Which of these classes could not possibly have a variable composition?


For which of these classes is separation into simpler substances by physical means possible?
 
Answer bank: pure substances, homogenous mixtures, heterogenous mixtures
 
 

 
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Expert Answer

Step 1

Homogeneous mixture is defined as a mixture in which all components are present in the same phase and having uniform composition.

 

Heterogeneous mixture is defined as a mixture in which all components are present in the different phases and having non-uniform composition.

 

Pure substance is defined as a chemical substance having definite and constant composition of all constituent particles from which it is formed.

Step 2

Homogeneous and heterogeneous mixture is obtained by mixing two or more substance which signifies both of these contain two or more substances in them which is described by the first statement.

 

Hence, the first statement describes the homogeneous and heterogeneous mixture.

Step 3

The composition of all the constituent particles of a pure substance is constant and definite, so that its composition cannot var...

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