Final answer:
To calculate the volume of methane gas at STP, we need to know the number of moles of gas. At STP, each mole of gas occupies 22.4 liters.
Step-by-step explanation:
The question concerns stoichiometry and the concept of molar volume of gases at Standard Temperature and Pressure (STP). According to the provided figures, at STP, one mole of any gas occupies 22.4 liters. To determine the volume that the methane gas occupied in the Erlenmeyer flask, we would need additional information such as the number of moles of methane present. Without this information, we cannot choose an answer from the options provided (A) 22.4 L, (B) 44.8 L, (C) 67.2 L, or (D) 89.6 L.