The diagram below shows the different phase transitions that occur in matter. which arrow would most likely represent the phase change that occurs when silver is poured into a mold and cools to become a solid bar? 1345

Arrow 5

Explanation: When liquid silver is poured into a mold and cools down to become solid bar is a transition in which liquid phase is converting into solid phase which is known as freezing and is represented by arrow 5.

Arrow 1 represent the vaporization process where liquid state changes to gaseous state.

Arrow 2 represent the Fusion process where solid state changes to liquid state.

Arrow 3 represent the sublimation process where solid state changes to gaseous state by escaping liquid state.

Arrow 4 represent the condensation process where gaseous state changes to liquid state.

Arrow 5 represent the freezing in which liquid changes to solid state.

Arrow 6 represent the deposition process where gaseous state changes to solid state by escaping liquid state.

  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-