A nurse is preparing to administer heparin 5.000 units subcutaneous every 12 hr to a client who is pregnant and has atrial fibrillation. Available is heparin solution for injection 7.500 units/mL. How many mL should the nurse administer? (Round the answer to the nearest hundredth. Use a leading zero if it applies. Do not use a trailing zero.)

Given: Prescribed dose: 5,000 units of heparin Available concentration: 7,500 units/mL Steps to solve: Determine the volume to be administered: Set up a proportion to solve for the unknown volume (X): 7,500 units/mL = 5,000 units/X mL Cross-multiplying gives us: 7,500 units x X mL = 5,000 units x 1 mL Simplifying: 7,500X = 5,000 Solving for X: X = 5,000 / 7,500 = 0.67 mL