Chem 1211 1st Edition Lecture 3 Outline of Last Lecture I States of Matter II Definitions III Phase Changes IV Properties Outline of Current Lecture I Substances II Mixture III SI Units IV Numbers V Arithmetic Functions VI Unit Conversions Current Lecture I Substances a Pure substance matter with both definite and constant composition with distinct chemical properties i Element cannot be chemically interconverted or broken down into simpler substances II Mixture a Compound a thing that is composed of two or more separate elements a mixture i Homogeneous mixture uniform in composition can t tell that it s a mixture These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute ii Heterogeneous mixture made up by two or more different substance which are mixed together but are not combined chemically III SI Units Quantity a Length d Mass g Time j Current m Temperature p Amount substance IV Numbers a Mega 1 000 000 b Kilo 1 000 c Deka 10 d Deci 0 1 e Centi 01 f Milli 001 g Micro 000001 h Nano 1x10 9 i Pico 1x10 12 V Arithmetic Functions Unit b e h k n q Symbol Meters Kilograms Seconds Ampere Degrees Kelvin Mole c f i l o r M Kg S A K mol a Use numbers with all significant figures b Do the math c Apply rule i When multiplying dividing the final answer should have the smaller of significant figures ii When adding subtracting the answer should have the least number of digits behind the decimal IV Unit Conversion a 13 37 cm inches b We know 2 54 cm 1 inch EXACTLY c 13 37 cm x 1 inch 2 54 cm 5 26 inches
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