Heartsaver First Aid Part I

Progress Indicator:
Question 3 of 22

3.  The explosive range of Ethane in normal air is:

Choices:
  1. 2.12% - 9.35%
  2. 3.0% - 12.5%
  3. 2.5% - 9.35%
  4. 1.86% - 8.41%

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