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Why do protease-producing cells of the stomach and of the pancreas produce only the precursors to active proteolytic enzymes?
What is the reducing agent and what has been reduced. What quantity of iodine can be obtained if 20.0g of NaI is mixed with 10.0g of MnO2
125 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
A sample of nitrogen of mass 3.12 g at 23 C is allowed to expand reversibly and adiabatically from 400 cm^3 to 2 dm^3
the mass of an evacuated 255ml flask is 143.187g. the mass of the flask filled with 267torr of an unknown gas at 25c is
the solution diluted in half by water ( 1mL of X and 1mL of H2O) has an absorbance at 425 nm of 0.8 and a molar extinction coefficient of 1.5 x 10^3 M^-1 cm^-1. what is the molar concentration of the original solution of X
For the reaction I_2(g)+Br_2(g)=2IBr(g), K_c=280 at 150 degrees Celsius. Suppose that .5 mol of I_2 and .5 mol of Br_2 is placed in a 1 L flask and allowed to reach equilibrium at this temperature. What are the equilibrium concentrations of I_2, B..
If the volume of the gas sample is decreased to 15.3 L holding the temp constant, the average molecular speed will increase, decrease or remain the same?
An ingot of copper with a mass of 48.00kg is drawn into a wire with a diameter of 0.8440cm. The density of the copper is 8.960 grams per cm3.
What types of intermolecular forces would you expect to exist among molecules of 1-butanol?
What is the enthalpy for reaction 1 reversed. Reversed equation: CO2-->CO+(1/2)O2 Express answers in kJ per mole.
What must be the initial temperature of 22g of steam that is mixed with 90g of water at 68 degree celcius in an adiabatic calorimeter with a heat capacity of zero and that produces
At 46 C a sample of ammonia gas exerts a pressure of 4.27 atm. what is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature
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