Pearson Edexcel International GCSE Wednesday 9 January 2019

(iii) Substance B has the empirical formula C 2 H 5 and an M r value of 58. Determine the molecular formula of substance B. (2) (c) Substance X is also covalently bonded, but its structure is different from that of A and B. It has a boiling point of 2230 °C. Explain, … ................
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