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Any number of green plants can photosynthesize glucose (C6H12O6)from carbon dioxide and water, producing oxygen as the remainingproduct. in an experiment in a biochemistry lab, 500 ml of oxygenwas produced in such experiment. the oxygen was collected overwater at 27C and at pressure of 786 Torr. the vapor pressure ofwater at 27 C is approximately mm Hg.
1)what mass of glucose was produced?
2) how many grams of water were used in this biosynthesis?

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Any number of green plants can photosynthesize glucose (C6H12O6)from carbon dioxide and water, producing oxygen as the remainingproduct. in an experiment in a biochemistry lab, 500 ml of oxygenwas produced in such experiment. the oxygen was collected overwater at 27C and at pressure of 786 Torr. the vapor pressure ofwater at 27 C is approximately mm Hg.
1)what mass of glucose was produced?
2) how many grams of water were used in this biosynthesis?

Fermentation of glucose produces ethyl alcohol and carbon dioxide.

C₆H₁₂O₆ (l) ------->2C₂H₅OH (l) + 2CO₂ (g)

What is the delta H (rxn) (in Kilojoules) if 678.5mL ofCO₂ was collected over water at 12degrees Cand 764.68 mm Hg? The vapor pressure of wateris 10.52 mm Hg.

Species delta H_f,KJ/mol

C₆H₁₂O₆ (l)-1,260.0

C₂H₅OH (l) -277.7

CO₂ -393.5

So I began by subtracting the water vapor from thetotalpressure.

764.68 mm Hg - 10.52 mm Hg = 754.16 mmHg

convert to atm: 754.16/760 = 0.992atm

n = PV/RT

n = (.992)(.6785 L) / (0.0821)(285K)

n = 0.0288 moles

delta H rxn = [ 2(-277.7) + 2(-395.5)] - [-1260]

= -86.4 KJ/mole

delta H rxn = -86.4 KJ/mole x 0.0288moles

= -2.49 KJ

Perform all calculations to the correct number of significantfigures and show all work. Vapor pressures of water are given inthe table in the experiment.

Question:1
If an Alka-Seltzer tablet contained 316 mg of aspirin, 1.927 x10⁰³ mg of sodium hydrogen carbonate (also known assodium bicarbonate), and 1.0008 x 10⁰³ mg of citric acidand nothing else, what is the percent, by mass, of sodium hydrogencarbonate in the tablet?

Question:2
Using the tablet information from Question 1, calculate the molesof CO₂ you would theoretically expect from 0.273 gramsof an Alka-Seltzer tablet at 720. torr and 286 K.

Question:3
You conduct an experiment where N₂ is collected overwater in a 2.33 L flask at 18^oC. At the conclusion ofthe experiment, the total pressure in the flask is 412 torr. Whatis the pressure of N₂ in the flask?

Question:4
A student reacted a sample of NaHCO₃ with acid under thesame conditions that will be used in lab. The total volume of gascollected plus the correction factor was 53.8 mL at a totalpressure of 674 torr and 21^oC. How many moles ofCO₂(g) were produced?

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