Happy Mole Day!!
![Mrs Halley and Mrs Heck Mole Day](https://prod.web-prod.swarthmore.edu/sites/default/files/styles/main_page_image/public/assets/images/chemistry-biochemistry/Mrs%20Halley%20and%20Mrs%20Heck%20300.png.webp?itok=YAEZqyAl)
Mrs Halley and Mrs Heck serving the Mole Day Cake!
Mole Day is celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m., and commemorates Avogadro's Number (6.02 x 10^23), which is a basic measuring unit in chemistry. The Mole Day Festivities included a chemistry-themed cake, guacamole, molasses cookies, and beverages. Did you know that a one liter bottle of water contains 55.5 moles of water?
![](https://prod.web-prod.swarthmore.edu/sites/default/files/styles/main_page_image/public/assets/images/chemistry-biochemistry/Students%20at%20Mole%20Day%20Celebration%2010-23_14.1%20200.png.webp?itok=qKOxfj1W)
![](https://prod.web-prod.swarthmore.edu/sites/default/files/styles/main_page_image/public/assets/images/chemistry-biochemistry/Students%20at%20Mole%20Day%202014%20250.png.webp?itok=XBYkBqP7)
![](https://prod.web-prod.swarthmore.edu/sites/default/files/styles/main_page_image/public/assets/images/chemistry-biochemistry/Students%20at%20Mole%20Day%20Celebration%2010-23_14.3%20200.png.webp?itok=gvWUZbK9)
![](https://prod.web-prod.swarthmore.edu/sites/default/files/styles/main_page_image/public/assets/images/chemistry-biochemistry/Students%20at%20Mole%20Day%20Celebration%2010-23_14.5%20200.png.webp?itok=lpzyXd78)
![](https://prod.web-prod.swarthmore.edu/sites/default/files/styles/main_page_image/public/assets/images/chemistry-biochemistry/Students%20at%20Mole%20Day%202014%20200.png.webp?itok=6XZVXlOS)