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In a hypothetical decomposition of dinitrogen pentoxide, it was found that at 344 seconds the concentration of dinitrogen pentoxide was 0.696 mol/L and at 708.1 seconds the concentration of dinitrogen pentoxide was 0.237 mol/L. What is the rate of decomposition over the specified time period in this reaction?
To keep ionic strength constant and maintain a more consistent matrix in a solution where ions could be influencing each other, another component is often added to the solution
Half-life equation for first-order reactions: (the 1/2 in t1/2 is a subscript) t1/2=0.693/k where t1/2 is the half-life in seconds (s) , and k is the rate constant in inverse seconds (s^-1).
The half-life of a reaction, is the time it takes for the reactant concentration to decrease by half. For example, after one half-life the concentration falls from the initial concentration to, after a second half-life to, after a third half-life ..
What happens if student forgets to rinse the buret with a small portion of EDTA solution. (Buret contains water droplets from washing.) If this incorrect concentration of EDTAis used to calculate the ppm CaCO3
Consider the reaction Cu2S + O2 → 2Cu + SO2. If 55.0 grams of Cu2S is heated in excess O2, what is the mass of Cu that can be produced?
compressed reversibly and adiabatically until the temperature reaches 250K. Given that its molar constant-volume heat capacity is 27.5J/Kmol, calculate final pressure and final volume.
At 700 degrees C, the total pressure of the system is found to be at 3.45 atm. If the equilibrium constant Kp for this reaction is equal to 1.52, calculate the equlibrium partial pressures of CO2 and CO gases.
An effective treatment for some cancerous tumors involve irradiation with "fast" neutrons. The neutrons from one treatment source have an average velocity of 3.3 x 10^7 m/s
The pressure of 3.0 L of an ideal gas in a flexible container is decreased to one-sixth of its original pressure, and its absolute temperature is decreased to one-ninth of the original. What is the final volume of the gas?
the calorimeter itself absorbs a negligible amount of heat, calculate combustion eneergies (change of energies) for benzene in both kj/g and kj/mol.
Draw a schematic of the flow. Clearly define and label the axes and any variables to be used. Indicate on the schematic the fluid on top and bottom of the slit.
assuming the volume of the stomach is 1.0L, what will the pH change of the stomach acid resulting from the ingestion of one regular strength strength maalox tablet?
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