You've asked your friends to define the terms "chemistry" and "chemical." with which definitions do you agree? check all that apply. check all that apply. a chemical is a substance that has the same composition but different properties wherever it is found. chemistry is the study of the composition, structure, properties, and reactions of matter. chemistry is a natural science concerned with the study of life and living organisms, including their structure, function, growth, evolution, distribution, and taxonomy. a chemical is a substance that has the same properties but different composition wherever it is found.

Explanation:

A chemical is made up of one or more chemical compounds that allow it to fulfill a particular function, because a chemical is a substance that has the same composition and properties wherever it is found.

Already Chemistry is a branch of the Natural Sciences that studies the matter, its properties, constitution, transformations and the energy involved in these processes. Matter, and all that composes it, is the main object of study of chemistry.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-