Pure formaldehyde gas (CH2O) is burned completely in air, using 50% excess air. a. What should be the Orsat analysis of the combustion gas? b. What should be the Orsat analysis of the combustion gas if instead of excess air, only enough were used to burn all the hydrogen to water, 25% of the carbon to CO2 and the remaining 75% to CO, the combustion being conducted that no oxygen gas whatever is left remaining in the combustion products.

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