CHEM 110 Chapter 1-5: Zumdahl textbook notes
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Chemistry is the study of the compositions, preparations, properties of substances and its applications. The scientific method: observation (qualitative and quantitative, hypothesis, prediction. 4. test by experiments->new observation->back to observation again. 5. law- summarizes what happens: theory- explain what happens (may change) M k h da d c m miu n p f a. 10^-13 pre x giga mega kilo hecto deka deci centi mili micro nano pico femto atto femto second- used to measure velocity of laser. Precision- the degree of agreement among several measurements error for precision- random error or indeterminate error. Accuracy- agreement with the true value error for accuracy- systematic error or determinate error. Zeros: leading zeros don"t count(0. 001) , captive zeros count(1. 008), trailing zeros don"t count(2400) Multiplication and division: same as least precise measurement(least number of signi cant gures) Addition and subtraction: same as least number of signi cant gures(least decimal places) Ancient greeks: what is the nature of this world.
