mimi145
mimi145 mimi145
  • 23-10-2016
  • Chemistry
contestada

Why isn't air travel based on hydrogen popular today? A.Hydrogen is very expensive B. Hydrogen is difficult to find C. Hydrogen is flammable and dangerous D. Hydrogen is too cold for travelers to stand on long trips

Respuesta :

erto
erto erto
  • 23-10-2016
the answer is c. hydrogen is flammable and dangerous
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Аноним Аноним
  • 23-10-2016
C.hydrogen is difficult to find
Answer Link

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