A-LevelChemistryAtoms, molecules and stoichiometryOct/Nov 2012Paper 1 Q61 Mark
Use of the Data Booklet is relevant to this question. The volume of a sample of ammonia is measured at a temperature of 60°C and a pressure of 103 kPa. The volume measured is 5.37 × 10-³ m³. What is the mass of the sample of ammonia, given to two significant figures?
A0.00019 g
B0.0034 g
C0.19 g
D3.4 g
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The correct answer is D. This question tests the candidate's understanding of atoms, molecules and stoichiometry within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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