A student was given three pieces of metal that looked like brass. Sample I had a volume of 17.3 mL and weighed 154.3 g, sample II had a volume of 28.4 mL and weighed 547.2 g, and sample III had a volume of 22.2 mL and weighed 186.1 g. Which sample(s) was (were) brass? (Brass: d $\approx$ 8 g/cm³)

Question

Quizplus · Accepted Answer

To determine if the samples were brass, we calculate the density of each sample and compare it to the given density of brass (approximately 8 g/cm³). Density is calculated as mass divided by volume. For sample I: 154.3 g / 17.3 mL = 8.92 g/cm³. For sample II: 547.2 g / 28.4 mL = 19.26 g/cm³. For sample III: 186.1 g / 22.2 mL = 8.38 g/cm³. Only sample III has a density close to that of brass, making it the correct choice.

A Student Was Given Three Pieces of Metal That Looked ≈\approx≈

A Student Was Given Three Pieces of Metal That Looked $\approx$