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A student is required to prepare 25.0 mL of ethanol using a sucrose fermentation technique. How many mL of carbon dioxide can be expected to fill a balloon used as a trap in the fermentation? (at 20 degrees C and 1.0 atm, the enzymatic system works at 65% efficiency and the solubility of CO2 in water at 20 degrees C is 88mL) The sucrose solution used in the fermentation was 0.350 M. Assume solubility of CO2 in water equivalent to the solubility in the sucrose solution. HINT: some of the CO2 obtained from fermentation dissolves in the solution, the rest goes to the balloon. Disregard water vapor pressure.
A solution is prepared by dissolving 1.50 g of compound in 25.0 mL H20 at 25 degrees Celsius. The boiling point of the solution is 100.45 degrees Celsius.
Find the pH and the concentration of each of the species of lysine in a solution of .010M lysine monohydrochloride (lysine-HCl)
The temperature of a sample of water increases from 21.9°C to 45.3°C as it absorbs 5669 J of heat. What is the mass of the sample.
M. tuberculosis, the organism that causes tuberculosis, can be completely destoryed by irradiation with UV light with a wavelength of 254 nm. What is the frequency?
An unknown consisting of a single sugar gives a negative fermentation test. Which one of the following tests would allow you to decide which of the five sugars used in this experiment you had?
Calculate the final temperature for 225 g of water, which starts at 20 degree Celcius , after 0.75 grams of biodiesel have to be burned to heat the water
Calcium in blood or urine can be determined by precipitation as calcium oxalate CaC2O4. The precipitate is dissolved in strong acid and titrated with potassium permanganate. The products of the reaction are carbon dioxide and Manganese ii ions.
If 2 volumes of 0.1 M monobasic potassium phosphate, KH2PO4, are mixed with 1 volume of 0.1 M dibasic sodium phosphate, Na2HPO4, what will be the pH of the mixture?
A 110.0 mL sample of a solution that is 3.0×10^?3 M in AgNO3 is mixed with a 220.0 mL sample of a solution that is 0.13 M in NaCN. After the solution reaches equilibrium, what concentration of Ag+(aq) remains
0.65 of sodium hydroxide (NaOH) pellets are dissolved in water to make 2.5L of solution. What is the pH of this solution
If the average kinetic energy of a gas is doubled and the volume remains constant, what is the change in pressure
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range.
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