A chemist repairs a solution of nickel chloride by measuring out 181. umol of nickel chloride

4.02x10^–4 mol/L

Explanation:

Data obtained from the question. This includes:

Mole of NiCl2 = 181 μmol = 18x10^–6 mole

Volume = 450 mL = 450/1000 = 0.45L

Molarity =?

Molarity is defined as mole of solute per unit litre of the solution. Mathematically, it is a represented by:

Molarity = mole /Volume

With the above formula, we can easily find the molarity of NiCl2 as follow:

Molarity = 181x10^–6 /0.45

Molarity of NiCl2 = 4.02x10^–4 mol/L

Therefore, the concentration of NiCl2 is 4.02x10^–4 mol/L