Other questions in this quiz

2. why are hydrogen fuel cells good for the environment?

  • cheap
  • fewer dangerous chemicals
  • lower energy use
  • does not require electrical energy

3. why can fuel cells run continuously?

  • open system - reactants in, products out
  • closed system - reactants are in the same system as products
  • closed system - reactants can flow in, but do not escape
  • open system - reactants and products stay in the same place

4. why are some cells non-rechargeable?

  • the chemical reactions stop after one of the reactants is used up
  • they can only be used once
  • the reactants do not stay in the cell after being used

5. why are other cells rechargeable?

  • the chemical reaction involved is reversible
  • they can be reused
  • there are always free ions available

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