Suppose that, from measurements in a microscope, you determine that a certain layer of graphene covers an area of 3.00μm2. Convert this to square meters and express the area in square meters to three significant figures.
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Conversion....
3.00 μm² x (1 m² / (10^6)²μm²) = 3.00x10^-12 m²
Based on 1 m = 1x10^6 μm