How many grams of cuso4.5h2o are require to prepare 100ml of 500ppm cu

Answer 1

500E-6*100grams=50E-3grams=.05grams Cu

Now, grams of copperIIsulfate pentahydrate..
mass=.05*formulamass/atomicmassCu
= .05*250/63.4 grams

Answer 2

8g