Chemistry 105 Week 2, Part 2
Chemistry 105 Week 2, Part 2 CH 105- 1E
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This 2 page Class Notes was uploaded by Jazelyn Little on Sunday January 24, 2016. The Class Notes belongs to CH 105- 1E at University of Alabama at Birmingham taught by Steven R. Harville in Spring 2016. Since its upload, it has received 66 views. For similar materials see Introductory Chemistry 1 in Chemistry at University of Alabama at Birmingham.
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Date Created: 01/24/16
2.7 Density Density is basically the relative heaviness of an object The formula is D = m/v A deviation that might have to be used is M = D x V Density is a physical property of matter. The density of water @ 4 ° Celsius is 1.00 g/ml Use density to calculate mass from volume Example 1: Mercury has a density of 13.6 g/ml. What size bottle will contain 13.6 g/ml? 13.6 x 1ml = 8.35 ml 13.6 g 3 Example 2: Gold has a density of 19.3 g/ cm . What’s the mass of a gold cube with 1.27 cm sides (a ½ inch cube). ** This problem will use the deviation I listed in the bullets above** cm V = (1.27 ¿¿3 = 2.05 3 cm 3 3 M = 19.3 g/ cm (2.05 cm ¿ = 39.6 g APPLICATIONS 1. An empty beaker with a mass of 42.3 g is filled with a liquid. The resulting mass is 62.87 g. The volume of the liquid is 19 ml. Beaker + liquid 62.81g - beaker - 42.3 g Liquid 20.57 g Liquid mass = 20.6 g volume = 19 mL D= M/V D= 20.6 g = 1.0842 g/ml =1.1 g/ml 19 ml 2. What is the mass of 1.0 L of air? Air has a density of 0.0012 g/ 3 cm . 1000ml 1cm3 0.0012g 1.0 L ( )( ) ( 3 ) = 1.2 g L 1ml cm
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