If the LEL for hydrogen = 4% and the UEL = 74% what mass of hydrogen was contained in the tin when it exploded? (conditions at the time of the experiment were 23oC and 750 mmHg)

If the LEL for hydrogen = 4% and the UEL = 74% what mass of hydrogen was contained in the tin when it exploded? (conditions at the time of the experiment were 23oC and 750 mmHg)

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