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

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Multiple Choice

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

Explanation:
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.

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