Answer :
The percent composition of water : 90.2%
Further explanation
The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
mass of water = 4.6 g
mass of Copper chloride = 0.5 g
mass of solution :
[tex]\tt mass~solution=mass~water+mass~Copper~chloride\\\\mass~solution=4.6+0.5\\\\mass~solution=5.1~g[/tex]
So the percent composition of water (%mass) :
[tex]\tt \%water=\dfrac{mass~water}{mass~solution}\times 100\%\\\\\%water=\dfrac{4.6~g}{5.1~g}\times 100\%\\\\\%water=90.2\%[/tex]
