Nitrate solution d adding dilute sulfuric acid to

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Unformatted text preview: 12 Metals usually have high melting temperatures and boiling temperatures because there are A strong attractions between the ions. B strong attractions between the delocalised electrons. C strong attractions between the ions and the delocalised electrons. D strong intermolecular forces. (Total for Question 12 = 1 mark) 13 In 2006, the concentration of carbon dioxide in the atmosphere was 382 ppm. This is equivalent to A 0.00382% B 0.0382% C 0.382% D 3.82% (Total for Question 13 = 1 mark) 14 A hazard that is particularly associated with alkanes is that they are A corrosive. B flammable. C toxic by inhalation. D toxic by skin absorption. (Total for Question 14 = 1 mark) TOTAL FOR SECTION A = 20 MARKS 8 *N37962A0824* BLANK PAGE *N37962A0924* 9 Turn over SECTION B Answer ALL the questions. Write your answers in the spaces provided. 15 The relative atomic mass of an element is determined using a mass spectrometer. (a) Define the term relative atomic mass. (2) . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (b) The mass spectrum of rubidium is shown below. 80 – 70 – 60 – 50 – Relative 40 – abundance 30 – 20 – 10 – – 86 86.5 Mass/charge ratio – 85.5 – – 85 – – – 0– 84.5 87 87.5 (i) Explain why there are two peaks in the spectrum. (1) . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ............................... .............................................................. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
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This note was uploaded on 09/22/2013 for the course CHEMISTRY Organic Ch taught by Professor Yang during the Fall '12 term at British School Of Washington.

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