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Daily Problem·Friday, 23 October 2026Back to today

Balance an equation

GCSE · Combined Science · OCR · C3.1 — Introducing chemical reactions: balancing equations, conservation of mass, formula mass and percentage by mass

Question

OCR Paper C1 (Foundation)

Balance the equation for the combustion of propane:

C₃H₈ + ___ O₂ → ___ CO₂ + ___ H₂O

Insert the missing numbers. (2 marks)

2 marks · take your time before peeking.

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