A-LevelChemistryAtoms, molecules and stoichiometryMay/June 2017Paper 1 Q191 Mark
A chemist took 2.00 dm³ of nitrogen gas, measured under room conditions, and reacted it with a large volume of hydrogen gas to produce ammonia. Only 15.0% of the nitrogen gas reacted to produce ammonia. Which mass of ammonia was formed?
A0.213 g
B0.425 g
C1.42 g
D2.83 g
✓ Correct Answer
The correct answer is B. 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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