Practice question · Numerical answer
Propane burns: . How many moles of are needed to burn 2 mol of propane completely?
Hints
- The balanced equation is a mole-ratio statement: 1 propane : 5 oxygen.
- Double the propane, double the oxygen.
Show the answer
10 (answers within ±0.01 count)
Why
2 × 5 = 10 mol of O₂. Balanced coefficients are exchange rates between substances, all stoichiometry is unit conversion through those ratios.
Practise Stoichiometric relationships
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