Infinite Significant Figures in Exact Numbers

What's an EXACT NUMBER, and why are we uncertain about so many other number? Learn how to recognize exact numbers and how to deal with their sig figs. 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. Watch the whole playlist: https://www.youtube.com/playlist?list=PLvUW25kBaMMs9m0GL4dz8jSs0K4PWfqCp Playlists to ACE Chemistry: https://www.youtube.com/playlist?list=PLvUW25kBaMMssGHFrR4Ee7_-8cFBvBkgN https://www.youtube.com/playlist?list=PLvUW25kBaMMvs5nsG1VUQA0wsP9LGEQha Can you solve it? https://www.youtube.com/playlist?list=PLvUW25kBaMMuKRkW9gDV7vlAk4Y9WRU7c https://www.youtube.com/playlist?list=PLvUW25kBaMMuHwUffHLOozSFQ0Cz_iTnC https://www.youtube.com/playlist?list=PLvUW25kBaMMv7_3jTEAe3vVZqPhsjf5Oy Educating entertainment https://www.youtube.com/playlist?list=PLvUW25kBaMMtc45U4K2b0Dm88L9D7d0EE PATREON: https://www.patreon.com/c/ChemistryinaNutshell 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