The chemical equation below shows the combustion of propane (c3h8). C3h8 + 5o2 right arrow. 3co2 + 4h2o the molar mass of oxygen gas (o2) is 32. 00 g/mol. The molar mass of c3h8 is 44. 1 g/mol. What mass of o2, in grams, is required to completely react with 0. 025 g c3h8? 0. 018 0. 034 0. 045 0. 91.

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.