[CHEM 131] - Final Exam Guide - Everything you need to know! (31 pages long)
29 Nov 2016
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Chemistry: the study of matter and the changes it undergoes. Matter: anything that has mass and takes up space. Measurement: memorize the si units for length, mass, time, temperature, and amount of substance (table 1. 2, memorize meaning of metric prefixes. Dimensional analysis: (given quantity) x (conversion factor) = desired quantity. We want 256 g converted to lb. Conversion factor = (desired quantity)/(given quantity) = (1 lb)/(453. 6 g) = 1. (256 g) x (1 lb/453. 6 g) = 0. 564 lb. A copper wire is 15. 02 meters long, what is the length of the copper wire in inches? (1 in = 2. 54 cm) (15. 02 m) x (1 in/. 0254 m) = 591. 34 in. (15. 02 m) x (1 cm/ 10-2 m) x (1 in/ 2. 54 cm) = 591. 34 in. 2453. 4ft3 x (12in/1ft)3 x (2. 54cm/1in)3 x (0. 01m/1cm)3 = 69. 47m3 = 6. 947 x 10-1 m3. 4. 8 x 10-5g/m3 x 6. 947 x 10-1m3 = 0. 0033g/m3. Dalto(cid:374)"s ato(cid:373)ic theor(cid:455: atoms, compounds, chemical reaction.
