What is the formula? How can density be used to identify materials?

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What is the formula? How can density be used to identify materials?

Example #1 Some liquid nitrogen has a mass = 14 grams and a volume = 36.3 mL. What is the density? D = Mass = 14 grams = .386 g/mL Volume 36.3 mL

Example #2 A substance has a mass of 24.32 kilograms and a volume of 19.8 L. What is the density? 24.32 kg = 24,320 grams 19.8 L = 19, 800 mL D = Mass = 24,320 grams = 1.23 g/mL Volume 19,800 mL

Density via Displacement

Example #3 An unknown metal having a mass of 435 g was added to a graduated cylinder that contained 40 ml of water. After the addition, the water rose to 78.1 ml. Using this info and a reference table, identify the unknown metal. Mass = ______ g Volume = 78.1 ml – 40 ml = _____ ml D = Mass Volume Identity of metal = _______ 435 38.1 g___ 435 38. 1 mL Lead