Chemistry PODs 23-26

Monday, 9/7/2015 NO SCHOOL

POD #23Tue, 9/8/2015 Make sure your first and last name and the period are in the upper right hand corner of your paper. All PODs should be numbered and dated and all responses should be numbered. 1.The density of aluminum is 2.7 g/mL. What is the volume of 8.1g of aluminum? 2.An object with a mass of 7.5g raises the level of water in a graduated cylinder from 25.1 mL to 30.1 mL. What is the density of the object? Challenge: A 147-g piece of metal has a density of 7.00 g/mL. A 50-mL graduated cylinder contains 20.0 mL of water. What is the final volume after the metal is added to the graduated cylinder?

POD #24Wed, 9/9/2015 Make sure that each POD is numbered and dated. 1.Use a double bubble map to compare and contrast pure substances and mixtures. 2.What is the difference between: a.An element and a compound b.A homogeneous and heterogeneous mixture Pure substance mixture

POD #25Thur, 9/10/2015 Make sure that each POD is numbered and dated. 1.Identify each as heterogeneous or homogeneous mixture: a.tap waterb. air c. blueberry muffin d. mud 2.Identify the technique that could be used to separate… a.two colorless liquids b.a nondissolving solid mixed with a liquid

POD #26Fri, 9/11/ What is the difference between a physical and a chemical property? 2.Determine whether each of the following describes a chemical or physical property. a.Diamonds are very hard substances b.Gold metal does not react with nitric acid c.Lithium metal is light enough to float on water d.Mercury is a liquid at room temperature