CHEM 1610 Chapter Notes - Chapter 1: Kelvin, Melting Point, Celsius
4 Oct 2018
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Is international system: si syst me international (france) Intensive does not depend on amount of material present. Extensive does depend on the amount of material. Uncertainty of measurement: precision degree of reproducibility, accuracy how close measurements are to true value. Sig figs: 9(cid:1006). (cid:1005)(cid:1009)(cid:1008) = (cid:1009) sig figs, (cid:1004). (cid:1004)(cid:1004)9(cid:1006)(cid:1004)(cid:1010)(cid:1011) = (cid:1009) sig figs, start from left and count toward right, use scientific notation. 12. 4335 when rounded to 6 sig figs if next number after last sig =. 5 round to even number. Ex: round the following to 2 sig figs. Keep number of decimals in the result that occur in the least precise number. Keep sig figs = to least number of sig figs. 34. 6x12. 1x1. 2 = 502. 392 (cid:1006) sig figs so (cid:1009)(cid:1004)(cid:1004) doesn"t work. 1. 31x10-2 wrong bc should be one sig fig after subtraction it = . 008, which is one sig fig so round to . 01 or 1x10-2. Known with infinite precision, ex: number of people in the room.
