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Chemistry — Second Secondary

Chemistry — Second Secondary

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Chemistry — Second Secondary 2026/2027

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Quiz

Question bank: Chapter 1 — Chemical Calculation

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1.
The molar mass of hydrated copper(II) sulphate CuSO₄·5H₂O is
159.5 g/mol
177.5 g/mol
249.5 g/mol
321.5 g/mol
2.
The mass of 0.25 mol of carbon dioxide is
11 g
22 g
44 g
5.5 g
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