Why are vials made from vapor glass stronger then typical vials? I. they contain aluminum instead of boron.
II. They submerged in hot salt bath.
III. They formed out of long glass tubes.

A) I
B) I and II
C) I and III
D) I, II, and III

2

Explanation:

I'm not that sure plz tell me if this is right

  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-