O-LevelChemistryStoichiometry5070/11 · May/June 2010 · Q381 Mark

When butanol, represented by C4HWOH, burns in air, carbon dioxide and water are formed. C4HWOH + XO2 → 4CO2 + yH2O Which values of w, x and y balance the equation?

A8, 6, 4

B9, 6, 4

C9, 6, 5

D10, 7, 5

✓ Correct answer

C: 9, 6, 5

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2010 Paper 1 Variant 1, question 38.

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