Final answer:
The total volume of all gases at the end of the reaction is 300 cm3, with 100 cm3 of methane, 200 cm3 of oxygen, and the converted products, carbon dioxide and water.
Step-by-step explanation:
In this reaction, 100 cm3 of methane and 500 cm3 of oxygen react to produce carbon dioxide and water. The balanced equation for the reaction is: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) According to the stoichiometry of the reaction, for every 1 mole of methane (CH4), 2 moles of oxygen (O2) are required. So, the ratio of methane to oxygen is 1:2.
Therefore, the total volume of all gases at the end of the reaction will be 3 times the initial volume of methane, which is 3 * 100 cm3 = 300 cm3. There will be 100 cm3 of methane, 200 cm3 of oxygen, and the converted products, carbon dioxide and water.