What is the volume (in mL) of a 2.00 M solution that contains 10.0 gram of KCl?

0.067L

Explanation:

Molarity of a solution, which refers to the molar concentration of that solution can be calculated thus:

Molarity = number of moles (mol) /volume (L)

According to the information given in this question, V = ?, Molarity = 2.00M, mass of KCl = 10grams.

Using mole = mass/molar mass

Molar Mass of KCl = 39 + 35.5

= 74.5g/mol

Mole = 10/74.5

Mole = 0.134mol

Using Molarity = number of moles (mol) /volume (L)

2 = 0.134/V

Cross multiply

V = 0.134/2

V = 0.067L

i believe the answer is a.

  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-