Treating trimethylamine with 2-chloroethyl acetate gives acetylcholine as its

Danielle Gibson Chem 115 Erin Battin Class 1 Notes 1/12/16 1/6/16 Chem 115 Notes Chapter 1  Types of Numbers Used in Chemistry o Exact Numbers  A number with a value that is exactly known  No error or uncertainty in the value  Numbers obtained by counting individual objects AND/OR defined numbers within a given measurement system. o Measured Numbers  Number with a value that is NOT exactly known due to the measuring process  Some error or uncertainty in the value  Amount of error depends on the measuring device (increment and distance between markings) and you!  Scientific Figures, and Uncertainty o Measured numbers will ALWAYS contain some uncertainty or error o This error is expressed by the number of significant figures (or digits) reported for the measured number o Something to Pay attention to:  As the number of significant figures increase, uncertainty/error decreases, and the precision of the measuring device increases  Rules for Determining Sig Figs o Rule for determining the Number of Significant Figures  (1.) All nonzero digits