chemistry lab

These are the four video links for Part one:https://youtu.be/olGOFHZXS_Yhttps://youtu.be/5RY7fJ0EOUEhttps://youtu.be/E6QSDEDXvB8https://youtu.be/1kLsNRPiqcoHere is a link for Part two’s first question’s articlehttps://www.npr.org/2020/09/23/915723316/1-in-7-americans-have-experienced-dangerous-air-quality-due-to-wildfires-this-ye