A-LevelChemistryAtoms, molecules and stoichiometryOct/Nov 2018Paper 1 Q61 Mark
Exactly 1.00 g of a metallic element reacts completely with 300 cm³ of oxygen at 298 K and 1 atm pressure to form an oxide which contains O²⁻ ions. The volume of one mole of gas at this temperature and pressure is 24.0 dm³. What could be the identity of the metal?
Acalcium
Bmagnesium
Cpotassium
Dsodium
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The correct answer is A. 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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