To evaluate the use of renewable resources, an experiment was carried out with rice hulls. After pyrolysis, the product gas analyzed 6.4% CO_{2}, 0.1% O_{2}, 39% CO, 51.8% H_{2}, 0.6% CH_{4}, and 2.1% N_{2}. It entered a combustion chamber at 90 °F and a pressure of 35.0 in. Hg and was burned with 40% excess air (dry) at 70 °F and an atmospheric pressure of 29.4 in. Hg; 10% of the CO remains.

a. How many cubic feet of air were supplied per cubic foot of entering gas?

b. How many cubic feet of product gas were produced per cubic foot of entering gas if the exit gas was at 29.4 in. Hg and 400 °F?

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