1) responde con verdadero o falso, justifica las falsas a)_ los solidos tienen masa y volumen definidos.
b)_ cada sustancia pura tiene un propio punto de fusión y ebullición.
c)_ mientras se calienta un liquido, no siempre se produce un aumento de temeperatura.
d)_ el agua hierve a 100℃ en cualquier parte del mundo.

  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-

it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.