CHM136H1 Lecture Notes - Lecture 1: Calcium Hydroxide, Chlorine, Manganese
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CHM136H1 Full Course Notes
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Chemistry: the study of the composition, properties, and transformations of matter. It will help prevent mistakes. x aunit measuremen t y. Example: at 20 c, the density of water is 0. 9978 g/ml. Accuracy how close the measurement is to the true value. Precision how close repeated measurements are to each other. accurate. Significant figures reflect the precision of the measurement. precise, but not. Significant figures are the total number of digits in the measurement. Significant figures in a measurement give all of the certain digits and one. (a) 0. 036653 m (b) 7. 2100 x 10 3 g. For rules for significant figures and their use in calculations, see ch. Basic definitions in chemistry: matter: anything that has both mass & volume, properties: describe or identify matter. Classification of matter called atoms: atoms of each element are identical and different from atoms of other elements, chemical compounds are made of.
