A class took a field trip to a music studio. The students watched through thick glass as the musicians played music inside the studio. The students could only hear the music when the studio door was open. The glass separating the musicians from the students is made with two layers of thick glass. The space between the glass layers has had all the air removed, creating a vacuum. Which statement best explains why the students were able to see the musicians even while they were unable to hear them? PLS HELP The frequency of light is much greater than the frequency of sound.

The speed of light is much greater than the speed of sound.

Light travels through glass while sound does not.

Sound requires a medium while light does not.

  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-

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

answer: mole of the gas

answer: mole of the gasexplanation: