A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2013 · Q131 Mark
Use of the Data Booklet is relevant to this question. Magnesium nitrate, Mg(NO₃)₂, will decompose when heated to give a white solid and a mixture of gases. One of the gases released is oxygen. 29.7 g of anhydrous magnesium nitrate is heated until no further reaction takes place. What mass of oxygen is produced?
A3.2 g
B6.4 g
C12.8 g
D19.2 g
✓ Correct answer
A: 3.2 g
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