IChO2013国际化学奥林匹克竞赛真题及答案(英文).pdfVIP

Face your challenge, Be smart THEORETICAL EXAMINATION JULY 20, 2013 MOSCOW, RUSSIA 1 General Directions - Write down your name and code number on each page. - You have 5 h to fulfill the tasks. Failure to stop after the STOP command may result in zero points for the current task. - Write down answers and calculations within the designated boxes. Give your work where required. - Use only the pen and calculator provided. - If you need draft paper use the back side of the paper. It will not be marked. - There are 38 pages in the booklet including the answer boxes, Cover Sheet and Periodic Table. - The official English version is available on demand for clarification only. - Need to go to the restroom – raise your hand. You will be guided there. - After the STOP signal put your booklet in the envelope (don’t seal), leave at your table. Do not leave the room without permission. - You have additional 15 minutes to read the whole set. 2 Physical Constants, Units, Formulas and Equations Avogadros constant 23 – 1 NA = 6.0221  10 mol Universal gas constant R = 8.3145 J∙K– 1∙mol– 1 Speed of light 8 – 1 c = 2.9979  10 m∙s Plancks constant –34 h= 6.6261  10 J∙s Faraday constant F = 96485 C∙mol– 1 Gravity of Eart