2021-10-02

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Chemistry in a Nutshell

An exact number has no uncertainty and infinite significant figures. If there are 6 people in a closed room, 6 is an exact number. Think of it as 6.0000000...zeros on to infinity. These numbers are the result of a count or a definition, not a measurement. Learn how to recognize exact numbers and how to calculate with them.

You can find all of my sig fig videos here: https://www.youtube.com/playlist?list=PLvUW25kBaMMs9m0GL4dz8jSs0K4PWfqCp

Time Stamps:

0:00 Introduction

0:47 How to recognize exact numbers

2:05 Measured values have finite sig figs

2:48 How to recognize exact definitions

3:21 Look for "Exact" or "Exactly"

3:51 Unit Conversion with an Exact Definition (3280 m to km)

#SignificantFigures #SigFigs #Chemistry