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A certain substance X decomposes. It is found that 50% of X remains after 100 minutes. How much X remains after 200 minutes if the reaction order with respect to X is zero order?
Suppose that you carry out an analytical procedure to generate a linear calibration curve like that shown in the figure below. Then you analyze an unknown and find an absorbance that gives a negative concentration for the analyte Select the true s..
The working buffer solution was warmed to 30oC and the pH of this solution was determined to be 8.03. What is the pKa of Tris under these conditions
What is the mass of a rectangular piece of copper 24.4cm x 11.4cm x 6.6cm? The density of copper is 8.92 g/cm^3.
An acetic acid solution is 6.00M and has a density of 1.04 g/Ml. What is the mass/ mass concentration of HCH3O2 (60.06g/mol)
What is the equilibrium partial pressure of N2O4? (atm) (b) Calculate the value of Kp for the reaction. (c) Calculate the value of Kc for the reaction.
The hydrated radii of sodium, hydronium, acetate, and nitrate ions are 4.5, 9.0, 3.5, and 3.0 °A, respectively what is the strength of the solution? calculate the activity coeffiecents of each speicies.
In Europe, gasoline efficiency is measured in km/L. If your car's gas mileage is 23.0 mi/gal, how many liters of gasoline would you need to buy to complete a 142-km trip in Europe?
For the reaction 2KClO3(s) --> 2KCl(s) + 3O2(g) delta H = -91.0 kJ a) what is delta h for the reaction-------------------------------2KCl + 3O2 ---> 2KClO3 b) what is the delta H for the reaction-------------------------KClO3 ------> KCl + 3/2 O2
Calculate the pH of a buffer solution made by mixing 34.2 g of sodium acetate into 1 L of a 0.09 M solution of acetic acid. Give the pH to two decimal places.
What is the electron configuration of the atom in the third row of the periodic table that has the smallest ionization energy?
The half-life for the reaction at 550C is 81.3 seconds. How long does it take for 89% of phosphine sample to decompose?
A 1.07g sample of a noble gas occupies a volume of 363mL at 35C and 678mmHg. Indentifythe noble gas in this sample
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