A-LevelChemistryAtoms, molecules and stoichiometryFeb/Mar 2021Paper 1 Q41 Mark
Originally, chemists thought indium oxide had the formula InO. By experiment they showed that 4.8 g of indium combined with 1.0g of oxygen to produce 5.8 g of indium oxide. The Ar of oxygen was known to be 16. Which value for the Ar of indium is calculated using these data?
A38
B77
C115
D154
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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...
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