Sulfur hexafluoride, a dense gas, is held in two separate containers in a storage room at an atmospheric pressure of 755 mmHg and 20.3 °C. The volume of container 1 is 2.09 L, and it contains 7.61 mol of the gas. The volume of container 2 is 4.46 L. Determine the moles of F atoms in container 2 and the density of the gas at the conditions in the room

Respuesta :

Explanation:

As it is given that both the given containers are at same temperature and pressure, therefore they have the same density.

So, mass of [tex]SF_{6}[/tex] in container- 1 is as follows.

    5.35 mol x molar mass of [tex]SF_{6}[/tex]

            = 7.61 mol x 146.06 g/mol

             = 1111.52 g

Therefore, density of [tex]SF_{6}[/tex] will be calculated as follows.

            Density = [tex]\frac{mass}{volume}[/tex]  

         density = [tex]\frac{1111.52 g}{2.09 L \times 1000 ml/L}[/tex]

                       = 0.532 g/mL

Now, mass of [tex]SF_{6}[/tex] in container- 2 is calculated as follows.

        4.46 L x 1000 mL/L x 0.532 g/mL

            = 2372.72 g

Hence, calculate the moles of moles [tex]SF_{6}[/tex] present in container 2 as follows.

  No. of moles = [tex]\frac{mass}{\text{molar mass}}[/tex]  

                        = [tex]\frac{2372.72 g}{146.06 g/mol}[/tex]

                        = 16.24 mol

Since, 1 mol [tex]SF_{6}[/tex] contains 6 moles F atoms .

So, 16.24 mol  [tex]SF_{6}[/tex] contains following number of atoms.

                = [tex]16.24 mol \times 6[/tex]

                = 97.46 mol

Thus, we can conclude that moles of F atoms in container 2 are 97.46 mol.