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:
![Casio FX-991ES Plus Non-Programmable Scientific Calculator, 417 Functions : Amazon.in: Computers & Accessories Casio FX-991ES Plus Non-Programmable Scientific Calculator, 417 Functions : Amazon.in: Computers & Accessories](https://m.media-amazon.com/images/I/51QI3mh9FIL._AC_UF1000,1000_QL80_.jpg)
Casio FX-991ES Plus Non-Programmable Scientific Calculator, 417 Functions : Amazon.in: Computers & Accessories
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