Methane and hydrogen sulfide form when hydrogen reacts with carbon disulfide. Identify the excess reagent and calculate how much remains after 36 L of H2 reacts with 12 L of CS2 .
4H2 (g) + CS2 (g) -> CH4 (g) + 2H2 S(g)a. 3 L CS
b. 6 L CS
c. 9 L CS
d. 12 L H
Answer: A