A sample of CH4 was collected over water for use in future chemical analyses. A sample of 69.85 L of CH4 was collected over water at 20.41∘C. Total pressure in the collection vessel was 740.1 mmHg. (The vapor pressure of water at this temperature is 2.3984 kPa.) What was the pressure of the gas collected?

Explanation:

Molarity is defined as the number of moles per liter of solution.

Mathematically,         Molarity =

Since it is given that the molarity of a solution of 14.0 g and volume is 150 mL or 0.15 L.

Whereas number of moles =

So, molar mass of is 97.94 g/mol.

Thus,      number of moles =

                                            = 0.142 mol

Therefore, calculate the molarity as follows.

              Molarity =  

                             =

                              = 0.946 mol/L

Hence, we can conclude that molarity of the solution is 0.946 mol/L.