Pearson Edexcel Level 3 GCE 9CH0/03 Chemistry Advanced PAPER 3: General and Practical Principles in Chemistry

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Answer ALL questions. Write your answers in the spaces provided. 1 Relative atomic mass is an important concept in chemistry. (a) Define the term relative atomic mass. (2) .......................... ............................................................................................................................................................................................................................................................. .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... .................................................................................................................................................................................................................................................................................... (b) A sample of neon consisted of three isotopes. Isotope Percentage abundance 20Ne 84.80 21Ne 2.26 22Ne 12.94 Calculate the relative atomic mass of neon in this sample. Give your answer to three significant figures. (2 [Show More]

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