Answer to Question #112069 in General Chemistry for Carol

Question

how many moles of insulin are needed to make 45mL of 0.0050M of insulin solution

Answer 1

Solution:

Molarity is the number of moles of solute per liter of solution.

Molarity = mol solute / L of solution.

Therefore,

Moles of insulin = Molarity of insulin × Volume of solution

Moles of insulin = (0.0050 M) × (0.0450 L) = 0.000225 mol

Moles of insulin = 2.25×10^-4 mol.

Answer: 2.25×10^-4 mol of insulin are needed.