A-LevelChemistryAtoms, molecules and stoichiometryOct/Nov 2024Paper 1 Q31 Mark
A 0.216g sample of aluminium carbide reacts with an excess of water to produce methane gas. This is the only carbon-containing product formed in the reaction. This methane gas burns completely in O2 to form H2O and CO2 only. The volume of CO2 produced at room temperature and pressure is 108 cm³. What is the formula of aluminium carbide?
AAl2C3
BAl3C2
CAl3C4
DAl4C3
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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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