Balancing equations!
Go to the following link: https://phet.colorado.edu/sims/html/balancing-chemical-equations/latest/balancing-chemical-equations_en.html Select the introduction option to review how to do it before the game. When you feel you are ready, go to the game option: Enter in the game and select the time. Do all the levels and take a picture of the mark you make. Send it here in comments. Try to overtake me!
