How many grams of cuso4 5 h20 are needed to make 1 liter of a 2% (w/v) cuso4. report to the nearest 1/10 g.

19.9 grams of will be needed.

Explanation:

Required strength of the solution = 2% (w/v)

This means that 2 gram of solute in 100 ml of solution.

Mass of  = 2 g

Moles of =

Volume of the solution = 100 mL = 0.1 L

Molarity of the solution:

0.08010 moles of are present 1 l of the solution.

Then mass of 0.08010 moles of will be:

0.08010 mol × 249.68 g/mol = 19.9993 g≈ 19.9 g

19.9 grams of will be needed.

anaphase.

hope this !

c is the answer because when something is left after something evaporates that shows the chemical change.