A gas has a volume of 10.0 mL when measured at 250 psi. If the pressure were changed to 500 psi, what would the new volume be?

5 mL

Explanation:

(m1 x v1) = (m2 x v2)

(10 mL x 250 psi) = (500 psi)X

2500 / 500 = 5

  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-