Using the single-step global mechanism given by Eqns. 5.1 and 5.2 for combus- tion of a hydrocarbon with air, compare the mass rates of fuel carbon conver- sion to CO2 for Φ-1, P = 1 atm, and T = 1600 K for the following fuels:

A. CH4-methane
B. C3Hz-propane. .
C. C8Hi8-octane.
Hint: Make sure that you include the nitrogen from the air in determining your reactants' concentrations

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Stage in which a star’s outer layers have started to cool and grow outward?

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.