Chemistry 1151, week 2 notes
Chemistry 1151, week 2 notes CHEM 1151
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This 4 page Class Notes was uploaded by Jessica Harbin on Monday August 29, 2016. The Class Notes belongs to CHEM 1151 at Columbus State University taught by Rajeev Dabke in Fall 2016. Since its upload, it has received 4 views.
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Date Created: 08/29/16
Chemistry 1151 Week Two Notes Review Week One notes Counting Significant Figures Side Notes Ex. Pg 33 2.28 Counting significant figures 5.08g + 25.1g = 30.18g round to 30.2g c) 24.568mL – 14.25mL = 10.318mL = 10.32mL Prefixes Table 2.4 Pg. 34 Ex. 9 9 G giga 1,000,000,000 10 10 m = 1Gm 6 6 Don’t switch up mega M mega 1,000,000 10 10 g = 1Mg and micro 3 3 K kilo 1,000 10 10 g = 1Kg -6 -6 m micro 0.000001 10 10 g = 1mg -9 -9 n nano 0.0000000001 10 10 g = 1ng Extra Pg. 37 2.33 cL = centiliters kg = kilograms ms = millisecond Gm = gigameters Chemistry 1151 Week Two Notes Conversions Side Notes Pg. 42 2.9 164lb = ?kg Equation: 1kg = 2.20lb To choose the right factor, use DUN Factor 1: (x/y) Factor 2: (y/x) Desired 1kg = x 2.20lb = y Unit in Factor 1: (1kg/2.20lb) Factor 2: (2.20lb/1kg) Numerate Choose the right one 164lb x (1kg/2.20lb) Pounds cancel each = 74.5kg other out Ex. 2 81.2kg = ?lb Use same equation 81.2kg x (2.20lb/1kg) = 178.64lb Round = 179lb or 1.79 x 10 lb Ex. 3 pg 45 2.51a Random info: Specific gravity has no 175cm = ?m units Equation 1m = 100cm SG= density of a substance over density of 175cm x (1m/100cm) water = 1.75 Study check 2.13 pg 48 Try on your own Chemistry 1151 Week Two Notes Pg 53 2.71 Side Notes Count to 3 Significant figures 0.00001258L 0.0000126L 3.528 x 10 kg 3.53 x 10 kg 125111m 1.25111 x 10 m5 First change then round it 5 1.25 x 10 m Pg. 54 2.85 Water in a test tube sits at 215mL, an object gets Density = mass/ volume dropped in and the water goes up 285mL. How much is the object? 285mL - 215mL 70mL object volume Lead 11.3g/mL Density Mass= Density x volume Mass = 11.3g/mL x 70mL = 791g Pure Substance: Matter fixed/definite substance Mixture: 2 or more diff substances physically Pure Substance Mixture mixed together Can I get something simpler Homo Hetero Homogenous: uniform composition Heterogeneous: non- No Yes uniformed composition Element Compound Chemistry 1151 Week Two Notes States of Matter pg. 62 3.1 Solid – tightly compacted Definite shape and volume. Move slowly. Liquid – med. Definite volume, indefinite shape. Moderate. Gas – loose Indefinite shape and volume. Move fast. Physical Property: measured w/o affecting the identity of the substance Chemical Property: ability of a substance to change into a new substance Physical Change: No change in composition (chemical make up) Chemical Change: Change in composition (chemical make up)