Where I can find the solutions to the preparatory problems for ICHO 2022?

Started by dolphinsea14 | Last post by dolphinsea14 March 08, 2022, 03:44:57 PM

Chemical formula of tooth erosion

Started by Dihiya | Last post by Dihiya May 09, 2021, 04:10:28 AM

Latin American Chemistry Competition (2nd edition)

Started by nicomanno | Last post by nicomanno February 16, 2021, 06:29:20 PM

Flemish chemistry olympiad question

Started by yuheng_wu | Last post by AWK December 17, 2020, 03:11:12 AM

Can someone tell me what I'm doing wrong here? (calculation)

Started by yuheng_wu | Last post by yuheng_wu December 17, 2020, 02:50:55 AM

Question about coordinate covalent bond

Started by yuheng_wu | Last post by yuheng_wu December 16, 2020, 02:06:23 PM

Ideal gas law question

Started by yuheng_wu | Last post by AWK December 16, 2020, 05:16:36 AM

Baltic Chemistry Competition (online)

Started by Kaspijs | Last post by Kaspijs October 11, 2020, 02:55:06 PM

d orbital splitting

Started by bluebunny2020 | Last post by bluebunny2020 March 09, 2020, 03:55:59 PM

Fast method to determine if a compound is polar or non polar

Started by kooryan | Last post by Fish200398 January 24, 2020, 10:51:04 AM

How can I find Taiwan Chemistry Olympiad past papers?

Started by Ev3r3sT | Last post by Ev3r3sT July 02, 2019, 01:00:41 PM

2020 US National Chemistry Olympiad

Started by trienebutdiene | Last post by trienebutdiene June 23, 2019, 11:00:06 AM

NO2 problem

Started by oque | Last post by mjc123 May 03, 2019, 07:55:23 AM