1) A copper penny has a mass of 3.1 g and a volume of 0.35 cm³. What is the density of copper?
2) A student finds a shiny piece of metal that she thinks is aluminum. In the lab, she determines that the metal has a volume of 245 cm³ and a mass of 612 g. Calculate the density. Is the metal aluminum?
3) A bar of silver has a mass of 68.0 g and a volume of 6.48 cm³. What is the density of silver?
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