Plz ! 54 !
the jackson prairie is a temperate grassland region in mississippi, spread over an area of fertile soil. what could be a reason why this grassland is disappearing rapidly?
a) changing into farmlands
b) encroachment by the forest
c) grazing by herds of buffalo
d) occasional outbreaks of fire

The flame produced by the burner of a gas (propane) grill is a pale blue color when enough air mixes with the propane (c3h8) to burn it completely. for every gram of propane that flows through the burner, what volume of air is needed to burn it completely? assume that the temperature of the burner is 195.0°c, the pressure is 1.05 atm, and the mole fraction of o2 in air is 0.210.