# chem chapter 1

 theory A tested explanation of the results of many experiments. solution A homogeneous mixture in which all particles are of the size of atoms, small molecules, or small ions. phases A homogeneous region within a sample. mixtures Any matter consisting of two or more substances physically combined in no particular proportion by mass. millimeter (mm) 0.001 m. 1000 mm milliliters (mL) 0.001 L. 1000 mL = 1 L. liter (L) 1 dm3. 1 L = 1000 mL = 1000 cm3 law A description of behavior (and not an explanation of behavior) based on the results of many experiments. intensive properties A property whose physical magnitude is independent of the size of the sample, such as density or temperature. homogeneous mixture A mixture that has only one phase and that has uniform properties throughout; a solution. heterogeneous mixture A mixture that has two or more phases with different properties. gram (g) 0.001 kg. extensive property A property of an object that is described by a physical quantity whose magnitude is proportional to the size or amount of the object (e.g., mass or volume). density The ratio of an object's mass to its volume. (mass/volume) pico 0.000000000001 10-12 nano 0.000000001 10-9 micro 0.000001 10-6 milli 0.001 10-3 centi 0.01 10-2 deci 0.1 10-1 kilo 1,000 103 mega 1,000,000 106 60 minutes 3600 seconds 1 inch 2.54 cm 1 meter 39.37 inches 1 yard 0.9144 m 1 mile 1.609 km 1 km 0.6215 mi 1 lb 453.6 g 1 kg 2.205 lb 1 oz 28.35 g 1 gal 3.785 L 1 L 1.057 qt 1 qt 946.4 mL 1 oz (fluid) 29.6 mL Celsius to Fahrenheit (9/5)temp in celsius + 32 fahrenheit to celsius (5/9)temp in fahrenheit - 32 Celsius to Kelvin celsius temp+273.15 Sig fig rules for zeros Zeros to the right of a decimal point are always counted as significant. Zeros to the left of the first nonzero digit are never counted as significant. Zeros on the end of a number without a decimal point are assumed not to be significant. sig fig rules for multiplication and division or multiplication and division, the number of significant figures in the answer should not be greater than the number of significant figures in the least precise measurement. sig fig rules for addition and subtraction For addition and subtraction, the answer should have the same number of decimal places as the quantity with the fewest number of decimal places Authorchemnut ID35893 Card Setchem chapter 1 Descriptionchemistry Updated2010-09-20T02:13:57Z Show Answers