Astudent obtains the following data: mass of empty, dry graduated cylinder: 25.938 g volume added of nacl solution: 6.515 ml mass of graduated cylinder + nacl solution: 39.895 g what is the density of the solution? express your answer to 3 digits after the decimal.

Density=2.142 g/mL

Explanation:

Density is defined as the mass per unit volume of a compound, the mass of the NaCl solution is given by the subtraction of the mass of the cylinder with the solution minus the mass of the empty dry cylinder.

  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-

can you list the answers so i can answer