[فراولة حمراء]

لو سمحتوا ممكن احد يشرحلي دي المسأله ..

4. What volume, in mL, of a 3.89 x 10-2 M solution is required to provide 2.12 g of KBr?
(Atomic weights: K = 39.10, Br = 79.90).

a) 520
b) 458
c) 389
d) 325
e) 425

بلييز =(