A sample of expired air is placed in a gas jar. A second gas jar holds ordinary atmospheric air. A lit candle is then put into each gas jar, as illustrated. The time for each flame to go out is recorded. While the candles burn, they consume the oxygen present in the jar. The table gives the findings from this experiment. Gas jar X: time for candle flame to go out = 15 s Gas jar Y: time for candle flame to go out = 9 s What explains the difference in the results for jars X and Y?
- AJar X contains atmospheric air which has more carbon dioxide.
- BJar X contains expired air which has more carbon dioxide.
- CJar Y contains atmospheric air which has less oxygen.
- DJar Y contains expired air which has less oxygen.