Chemistry > EXAM REVIEW > Edexcel Level A - Chemistry (Latest Chemistry AS Questions and Answers) (All)
Edexcel Level A - Chemistry (Latest Chemistry AS Questions and Answers)
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Edexcel Level A - Chemistry (Latest Chemistry AS Questions and Answers) - Each question or incomplete statement is followed by four suggested answers, A, B, C or D. Select the best answer in each cas... e.The answers are given, with some commentary, after Question 10. 1 The definition of the mole is A the number of atoms in exactly 12 grams of the isotope 12C B the number of molecules in 24 dm3 of a gas at 273K and 1 atm C the number of molecules in 24 dm3 of a gas at room temperature and 1atm D the amount of any substance containing the same number of elementary entities as there are atoms in exactly 12grams of the isotope 12C 2 Which of the following equations is associated with the definition of the standard enthalpy of formation of carbon monoxide? A C(s) – 1O2 (g) CO(g) B C(graphite) – 1O2 (g) CO(g) C C(s) O(g) CO(g) D C(g) – 1O2 (g) CO(g) [Show More]
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