Gases emitted during volcanic activity often contain high concentrations of hydrogen sulfide and sulfur dioxide.These gases may react to produce deposits of sulfur according to the equation:
For the complete reaction of 6.41 mol of hydrogen sulfide:

Question

Gases emitted during volcanic activity often contain high concentrations of hydrogen sulfide and sulfur dioxide.These gases may react to produce deposits of sulfur according to the equation: 
For the complete reaction of 6.41 mol of hydrogen sulfide:

Quizplus · Accepted Answer

According to the balanced chemical equation, 1 mol of hydrogen sulfide (H2S) reacts with 1 mol of sulfur dioxide (SO2) to produce 1 mol of sulfur (S) and 1 mol of water vapor (H2O). Therefore, for the complete reaction of 6.41 mol of H2S, we need 6.41 mol of SO2 and we will produce 6.41 mol of S and 6.41 mol of H2O.

To find the mass of sulfur (S) produced, we need to use the molar mass of sulfur (32.066 g/mol).

6.41 mol of S x 32.066 g/mol = 205.6 g of S

Therefore, the closest answer choice is A) 308 g of sulfur, which is approximately 1.5 times the calculated amount. None of the other answer choices can be obtained from the given information.

Gases Emitted During Volcanic Activity Often Contain High Concentrations of Hydrogen