Iron has a density of 7.9 g/cm³.What is the mass of a cube of iron with the length of one side equal to 55.0 mm? A)2.1 × 10⁴ g B)4.3 × 10² g C)1.3 × 10³ g D)1.4 g E)2.3 × 10^-2 g

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Quizplus · Accepted Answer

First, convert the side length from mm to cm: 55.0 mm = 5.5 cm. The volume of the cube is (5.5 cm)^3 = 166.375 cm³. The mass is then density × volume = 7.9 g/cm³ × 166.375 cm³ = 1,314.3625 g, which is approximately 1.3 × 10³ g.

Iron Has a Density of 7