Question

12.60 mg KI in 109.9 mL of solution

Answer 1

Answer: Molarity (M) = 6.897 x 10-4 (exponent)

Explanation: Atomic weight of KI is 166.028

12.6 mg = 0.126g/ 166.028 = 7.58 x 10-5 mol

Molarity (M) = concentration

M = moles(n)/Volume (in liters)

M= 7.58 x 10-5 mol/0.1099L = .0006897 M = 6.897 x 10-4 (exponent)