Final answer:
The nurse should administer 1 mL of lorazepam.
Step-by-step explanation:
The nurse should administer 1 mL of lorazepam.
To calculate the amount of lorazepam to administer, we need to use the formula:
Dose (mg) = Concentration (mg/mL) x Volume (mL)
Given that the available concentration is 4mg/mL, we can rearrange the formula to solve for the volume:
Volume (mL) = Dose (mg) / Concentration (mg/mL)
Since the dose of lorazepam is not provided in the question, we cannot calculate the exact volume. However, if the dose is given, we can substitute it into the formula to find the volume in mL.