O-LevelChemistryStoichiometry5070/11 · Oct/Nov 2021 · Q121 Mark

Methane burns in oxygen. CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) 10 cm³ of methane is reacted with 25 cm³ of oxygen. What is the total volume of gas that would be measured after the reaction? (Assume all volumes of gases are measured at room temperature and pressure.)

A10 cm³

B15 cm³

C30 cm³

D35 cm³

✓ Correct answer

B: 15 cm³

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2021 Paper 1 Variant 1, question 12.

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