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Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secreting cells. The cells secrete HCl, proteolytic enzyme zymogens, mucin, and intrinsic factor. The pH of gastric juice is acidic, between 1-3. If the pH of gastric juice is 2.1, what is the amount of energy (?G) required for the transport of hydrogen ions from a cell (internal pH of 7.4) into the stomach lumen? Assume that the potential difference across the membrane separating the cell and the interior of the stomach is -60.0 mV (inside of cells negative relative to the lumen of the stomach).
Assume that the temperature is 37 °C.
The Faraday constant is 96.5 kJ·V-1·mol-1 and the gas constant is 8.314× 10-3 kJ·mol-1·K-1. Express your answer in kJ/mol.
When steam (hot water) is passed over iron, hydrogen gas and iron (3) oxide are formed. What weight of steam would be needed to react completely with 100.0g of iron.
To determine the percent acetic acid (mass percent) in a vinegar sample, you perform a titration using a 0.2508 M NaOH standard solution. A 20.62-mL volume of the NaOH solution is required to reach the endpoint in the titration of a 7.248 sample o..
A voltaic cell consists of a Hg/Hg2^2+ electrode(E degrees=0.85V) and a Sn/Sn^2+ electrode(E degrees=-0.14V). Calculate[Sn^2+]if [Hg2^2+]=0.36 M and Ecell=1.04V at 25 degrees C.
hydrogen gas is generated when calcium reacts with water. the volume of gas collected over water at 30 degree celcius and pressure of 988 mm Hg is 641 ml. what is the mass in grams of the hydrogen gas obtained? the pressure of water vapor at 30 de..
Calculate kinetic energy of a 2 ton truck lumbering along at 60 mi/hr.
if 100 mL of 0.100 M NaCl is added to 100 mL of .01 M NaCl, what is the concentration of Na ions in the final solution?"
calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400.0g of H2O
Consider the following reaction: NH4HS(s) NH3(g) + H2S(g) An equilibrium mixture of this reaction at a certain temperature was found to have [NH3]=.278M and [H2S]=.355M.
28.98 mL of a 0.1962 mol/L EDTA solution is required to titrate a sample to the equivalence point. How many moles of divalent metal cations were in your sample?
Proceeds at a certain temperature until the partial pressure of H2O, H2, and O2 reach 0.0500 atm, 0.00200 atm, and 0.00800 atm respectively. What is the value of the equilibrium constant at this teperature?
An inert gas occupies volume of 366 ml at temperature 41 oC and pressure 354 Torr. What volume does the gas occupy at standard ambient temperature and pressure (SATP)?
What volume of 0.955 M HCl, in milliliters, is required to titrate 2.152 g of Na2CO3 to the equivalence point?Na2CO3(aq) + 2HCl(aq) ---> H2O(l) + CO2(g) + 2NaCl(aq)
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