While you are home enjoying yet ANOTHER snow day, it would be very beneficial for you to do some practice on counting atoms and elements in chemical formulas. You can find some practice below.
http://www.wlhs.wlwv.k12.or.us/cms/lib8/OR01001812/Centricity/Domain/1638/counting%20atoms%20practice.pdf
https://quizlet.com/65263082/counting-atoms-in-compounds-flash-cards/
https://www.youtube.com/watch?v=kqy78NIV5RM
http://www.wlhs.wlwv.k12.or.us/cms/lib8/OR01001812/Centricity/Domain/1638/counting%20atoms%20practice.pdf
https://quizlet.com/65263082/counting-atoms-in-compounds-flash-cards/
https://www.youtube.com/watch?v=kqy78NIV5RM