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Methane (CH4) burns in air to form carbon dioxide and water as shown below. CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) If a sample of methane occupies 400. mL at 5.03 atm, what pressure (in atm) of oxygen gas with the same temperature and volume is required to complete the reaction? Answer: 10.06 =