Final answer:
The mole ratio in the chemical equation 8H2 + S8 → 8H2S indicates for every mole of sulfur reacted, eight moles of hydrogen gas are needed, producing eight moles of hydrogen sulfide.
Step-by-step explanation:
Based on the balanced chemical equation provided, 8H2 + S8 → 8H2S, the mole ratio can most likely predict the quantities of reactants and products in a chemical reaction. For every mole of sulfur (S8) reacted, eight moles of hydrogen gas (H2) are required, and this reaction will produce eight moles of hydrogen sulfide (H2S). Therefore, when utilizing mole ratios, one can predict that starting with one mole of sulfur, eight moles of H2 would be needed, and this would result in the formation of eight moles of H2S, assuming complete reaction without any limiting reactants.