A stock bottle is labeled 30. mg/mL and the order is a dose of 13.5 mg , how many milliliters will the nurse draw up in the syringe?

Answer 1

You are given that every one milliliter in the stock bottle has 30. mg.

To find the answer, let x=the number of mL you need.

Set up the ratio. x mL/13.5 mg = 1 mL/30. mg

Solving for x, you get x mL = (1 mL/ 30. mg)*13.5 mg = 0.45 mL needed. This is an exact value. Since the lowest number of significant figures given in the problem is two (from the 30. mg), this value is proper.