Chemistry 0620 · IGCSE · Hydrogen–oxygen fuel cells

Hydrogen–oxygen fuel cells — practice question

A hydrogen-oxygen fuel cell consumes $630\,\text{dm}^3$ of oxygen. This oxygen for the reaction is obtained from clean, dry air. What is the minimum volume of clean, dry air required to supply this amount of oxygen?

  • A$788\,\text{dm}^3$
  • B$808\,\text{dm}^3$
  • C$3000\,\text{dm}^3$
  • D$3316\,\text{dm}^3$

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