A piece of filter paper has an area of 12.5 cm2. Which of these expressions shows the correct setup for converting this area to square millimeters (mm2) ? What is the area of the filter paper in square millimeters?

Question

Chelsea Kent

Chemistry

6 December, 06:54

A piece of filter paper has an area of 12.5 cm2. Which of these expressions shows the correct setup for converting this area to square millimeters (mm2) ? What is the area of the filter paper in square millimeters?

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Answers (2)

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Clinton Lam · Answer 1

Hello there.

A piece of filter paper has an area of 12.5 cm2. Which of these expressions shows the correct setup for converting this area to square millimeters (mm2) ?

12.5 cm² x (10 mm / 1 cm) ² = 1250 mm²

Cullen Mcbride · Answer 2

We are given with the area of a filter paper in cm² and we need to convert this to mm². We can do this by dimensional analysis.

12.5 cm² x (10 mm / 1 cm) ² = 1250 mm²

Notice that the ratio of the conversion between mm and cm is squared including the values and not just the units.