A thin sheet of iridium metal that is 2.13 cm by 6.40 cm has a mass of 82.8 g and a thickness of 2.68 mm.What is the density of iridium? A) 22.6 g/cm³ B) 2.27 g/cm³ C) 3.03 $\times$ 10³ g/cm³ D) 0.0442 g/cm³ E) 0.442 g/cm³

Question

Quizplus · Accepted Answer

The density of a material is its mass per unit volume. The volume of the sheet is:$$V = (2.13 	ext{ cm})(6.40 	ext{ cm})(0.268 	ext{ cm}) = 3.67 	ext{ cm}^3$$The density is then:$$ho = \frac{m}{V} = \frac{82.8 	ext{ g}}{3.67 	ext{ cm}^3} = 22.6 	ext{ g/cm}^3$$

A Thin Sheet of Iridium Metal That Is 2 ×\times× 103 G/cm3 D) 0

A Thin Sheet of Iridium Metal That Is 2 $\times$ 10³ G/cm³
D) 0