A-LevelChemistryAtoms, molecules and stoichiometryMay/June 2010Paper 1 Q71 Mark
Which mass of gas would occupy a volume of 3 dm³ at 25 °C and 1 atmosphere pressure? [1 mol of gas occupies 24 dm³ at 25 °C and 1 atmosphere pressure.]
A3.2 g O2 gas
B5.6 g N2 gas
C8.0 g SO2 gas
D11.0 g CO2 gas
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of atoms, molecules and stoichiometry within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
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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