標題:
關於alkanes and alkenes的簡單化學問題
發問:
1. Why is it dangerous to add cold water to a tray containing molten wax at a high temperature? (1 mark)2. Cracking of naphtha gives alkane A (relative atomic mass 58), alkene B (relative molecular mass 42) and other products.(a) Deduce the molecular formula A. (2 marks) 3. Balance the... 顯示更多 1. Why is it dangerous to add cold water to a tray containing molten wax at a high temperature? (1 mark) 2. Cracking of naphtha gives alkane A (relative atomic mass 58), alkene B (relative molecular mass 42) and other products. (a) Deduce the molecular formula A. (2 marks) 3. Balance the equation. C4H10(g) + O2(g) → CO2(g) + H2O(I)
最佳解答:
1) When water is added molten wax, water will vaporize immediately. It leads to spillage of hot molten wax. 2)since A is alkane, A can be expressed as CnH2n+2 12(n) + 1 (2n+2) = 58 n= 4 A is C4H10 Similar procedure to B(is it B part?) B is C3H6 3) C4H10(g) + 13/2 O2(g) → 4CO2(g) + 5H2O(I)(Multiply both side if it is CE level)
關於alkanes and alkenes的簡單化學問題
發問:
1. Why is it dangerous to add cold water to a tray containing molten wax at a high temperature? (1 mark)2. Cracking of naphtha gives alkane A (relative atomic mass 58), alkene B (relative molecular mass 42) and other products.(a) Deduce the molecular formula A. (2 marks) 3. Balance the... 顯示更多 1. Why is it dangerous to add cold water to a tray containing molten wax at a high temperature? (1 mark) 2. Cracking of naphtha gives alkane A (relative atomic mass 58), alkene B (relative molecular mass 42) and other products. (a) Deduce the molecular formula A. (2 marks) 3. Balance the equation. C4H10(g) + O2(g) → CO2(g) + H2O(I)
最佳解答:
1) When water is added molten wax, water will vaporize immediately. It leads to spillage of hot molten wax. 2)since A is alkane, A can be expressed as CnH2n+2 12(n) + 1 (2n+2) = 58 n= 4 A is C4H10 Similar procedure to B(is it B part?) B is C3H6 3) C4H10(g) + 13/2 O2(g) → 4CO2(g) + 5H2O(I)(Multiply both side if it is CE level)
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