In your chemistry class, your instructor fills three different flasks with three different gases. She tells you that one gas is carbon dioxide (CO2), one is oxygen (O2), and one is simply the mixture of the gases in the atmosphere (air).
She removes the stopper from each flask and quickly performs a splint test as shown in this video. You notice that the ember continues burning in the first flask, it reignites but does not blow itself out or pop in the second flask, and it is completely extinguished in the third flask.
Which gas was in each flask?
air
oxygen
carbon dioxide
Drag the name of each gas to the correct flask.