Homework Help: AP Bio - same question

Posted by muffy - still stumped on Sunday, September 13, 2009 at 11:31am.

My teacher said this is a very hard question, but I'm trying to make an attempts. Can you guide me?

A biologist places a plant in a closed chamber. A sensor in the chamber maintains the carbon dioxide level at the normal atmospheric concentration of 0.03%. Another sensor allows the biologist to measure the amount of oxygen produced by the plant over time. If the plant produces 0.001 mole of oxygen in an hour, how much Carbon dioxide had to be added to the chamber during that hour to maintain the atmospheric concentration of 0.03%?

AP bio - bobpursley, Saturday, September 12, 2009 at 2:48pm
look at the balanced chemical reaction...

6CO2+ 6H2O >>6 O2 + C6H12O6
So for each mole of oxygen produced, one mole of carbon dioxide was used.

AP bio - muffy, Saturday, September 12, 2009 at 3:02pm
Thanks, but I'm still really confused (that seems to be my mantra lately). I haven't had chemistry for 2 years and I'm at a loss, where to next?

AP bio - muffy - still stumped, Saturday, September 12, 2009 at 7:31pm
Help! I'm not sure where you got that equation from.

AP Bio - same question - bobpursley, Sunday, September 13, 2009 at 11:35am
That equation is the photosynthesis equation.

so if .001 mole of O2 is oxygen/hr is being used, .001 mole of CO2 has to be pumped in to maintain the concentration.

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