International Chemistry Olympiad - IChO - For the competition purposes, all the competitors will be given a calculator Casio fx-991EX. The manual for the calculator can be downloaded from the following link:
![Found this incredible function on my Fx991EX if you press shift and Option button on left corner it creates a QR code that can be scanned with a phone to see graphing Found this incredible function on my Fx991EX if you press shift and Option button on left corner it creates a QR code that can be scanned with a phone to see graphing](https://preview.redd.it/b4afcauvzvw51.jpg?auto=webp&s=9b4abf91b2abf20d9b1f9207ae41abe199c48a58)
Found this incredible function on my Fx991EX if you press shift and Option button on left corner it creates a QR code that can be scanned with a phone to see graphing
![FX-991ES Plus 2nd edition | Technical & scientific calculator | School and graphic calculators | Products | CASIO FX-991ES Plus 2nd edition | Technical & scientific calculator | School and graphic calculators | Products | CASIO](https://www.casio-europe.com/resource/images/sgr/detail/fx991esplus.jpg)
FX-991ES Plus 2nd edition | Technical & scientific calculator | School and graphic calculators | Products | CASIO
![Amazon.com : Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Office Products Amazon.com : Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Office Products](https://m.media-amazon.com/images/I/51PZjkVrE4L._SY350_PKmb-play-button-overlay_.jpg)