題組內容

Part 2. Short Answer [80 marks]

Using Mandarin to answer the short questions is allowed except question 32 and 33.

21. Urea, (H₂N)₂CO, is excreted by mammals and can be used as a fertilizer.

21e. The combustion of urea produces water, carbon dioxide and nitrogen. Formulate a balanced equation for the reaction. [2 marks]