Lesson: Chapter 17 — Rate of Reaction

17.1. Surface area of the reactants 2 of 6 Reset answers

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Question 2

What is the total surface area of a cube of limestone 2 cm along each edge?

A 8 cm² B 24 cm² C 48 cm² D 12 cm²

The right answer is the one marked above.

24 cm². One face has an area of 2 cm × 2 cm = 4 cm², and a cube has 6 faces: 4 cm² × 6 = 24 cm².

8 cm³ is the volume of the cube, not its area. 48 cm² is what you get after cutting it into 8 small cubes.

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