Final answer:
The powder volume in the vial is calculated by subtracting the volume of sterile water added (4.3 mL) from the final total volume (5 mL), which results in a powder volume of 0.7 mL.
Step-by-step explanation:
To determine the powder volume in the vial, we need to use the information provided about reconstitution. The vial is reconstituted with 4.3 mL of sterile water to reach a final volume of 5 mL. This implies that the powder itself has some volume that, when combined with the 4.3 mL of water, will increase the total volume to 5 mL. Thus, the powder volume is essentially the final volume minus the volume of the water added.
Calculating this, we have:
- Total final volume after reconstitution: 5 mL
- Volume of sterile water added: 4.3 mL
- Powder volume: Total final volume - Volume of sterile water added = 5 mL - 4.3 mL = 0.7 mL
Therefore, the powder volume in the vial is 0.7 mL.