The complete combustion of methane, CH4, can be represented by the equation CH4 (g) + 2 O2 (g) ---> CO2 (g) + 2H2O (g) 1. How many grams of CO2 are formed from the combustion of 129 g methane? a. 43.6 g b. 54.5 g c. 264 g d. 330 g 2. How many litres of O2 are needed to produce 20 L CO2 at STP? a. 10 L b. 20 L c. 22.4 L d. 40 L 3. How many grams of water are produced from the combustion of 56 L CH4 at STP? a. 45 g b. 63 g c. 90 g d. 126 g

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