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MissPhiladelphia
The balanced equation is CO2 + 4 H2 = CH4 + 2 H2O the ratio between CO2 and CH4 is 1 : 1 moles CH4 = 25.1 the ratio between H2 and H2O is 4 : 2 moles H2 = 19.1 x 4 / 2 = 38.2