What is the volume (mL) of a 0.8 M CuCl2 solution needed to make 100 mL of a 0.36 M CuCl2 solution

it is the most commonly accepted one

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.