Question

hydrogen gas is explosive within range of 4%- 75%. Assuming that each student in your class produces 6L of H2 and that the lab is not ventilated, is there danger of an explosion?

Answer 1

What is the volume of the classroom?

Answer 2

But H2 alone is not explosive. You also need enough O2. O2 is 20% in the air. So write the equation for combustion down.