The normal concentration range of lactate in blood serum is 0.6–1.8 mmol/L. What is the molarity of lactate in serum that contains 1.2 mmol of lactate per liter? The serum concentration of cortisol, a...

The normal concentration range of lactate in blood serum is 0.6–1.8 mmol/L. What is the molarity of lactate in serum that contains 1.2 mmol of lactate per liter? The serum concentration of cortisol, a hormone, is expected to be in the range 8–20 mg/dL. What is the part per million concentration of cortisol in serum that contains 10 mg of cortisol per deciliter?