Question

A 0.09 mg/L IV solution =

0.9%

9%

90%

900%

Answer 1

None of the above.

Calculation:
0.09 mg/L = 0.00009 g/L. Percent (w/v) = g per 100 mL = (g/L) / 10 = 0.00009/10 = 0.000009% (9 × 10^-6 %).

For reference: 0.9% = 9 g/L = 9,000 mg/L, so 0.09 mg/L is far smaller than 0.9%.