1.0 mg/cm2 equals how many micrograms per square centimeter?

1.0 mg/cm2 equals how many micrograms per square centimeter?

• A. 100 ug/cm2
• B. 1000 ug/cm2
• C. 10 ug/cm2
• D. 10000 ug/cm2

Answer: (B)

Converting mass units while keeping the area the same is the key idea. Since 1 mg equals 1000 micrograms, 1.0 mg per square centimeter becomes 1.0 × 1000 micrograms per square centimeter. That gives 1000 μg per cm^2. The other options would correspond to different amounts per area (for example, 0.1 mg/cm^2 would be 100 μg/cm^2, etc.), so they are not the same as 1.0 mg/cm^2.

Converting mass units while keeping the area the same is the key idea. Since 1 mg equals 1000 micrograms, 1.0 mg per square centimeter becomes 1.0 × 1000 micrograms per square centimeter. That gives 1000 μg per cm^2. The other options would correspond to different amounts per area (for example, 0.1 mg/cm^2 would be 100 μg/cm^2, etc.), so they are not the same as 1.0 mg/cm^2.