**Explanation:**

Molarity is defined as number of moles divided by volume in liter.

Mathematically, Molarity =

Since, it is known that 1 L equals 1000 ml so 65.0 mL equals 0.065 L.

Therefore, it is given that volume is 0.065 L and molarity is 2.20 M. Hence, calculate number of moles as follows.

Molarity =

Number of moles =

=

= 0.143 mol

Thus, we can conclude that **there are 0.143 moles NaOH are contained in 65.0 mL of a 2.20 M solution of NaOH in .**