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Consider a buffer by dissolving .139 M sodium benzoate and .081 M benzoic acid in water and adjusting the final volume of the solution to 500 mL. pKa of benzoic acid = 4.19. What is the pH of the buffer?
When 50.0 mL of 0.50 M formic acid is titrated with 0.50 M sodium hydroxide, calculate the pH for each of the following: Ka of formic acid = 1.8 x 10^-4 Be sure to account for volume changes at each step.
distinguish between an absorption spectrum and an emission spectrum. with which did bohr
At high temp, Iodine decomposes into atomic iodine. 3% of the I2 decomposes when .05 moles of iodine is placed in a .25 L flask. Calc K
Nitrogen gas when combined with hydrogen gas forms ammonia gas according to the following equation N2(g) + 3H2(g) = 2NH3(g). Delta H(rxn)=-56 kJ. The delta H(rxn) was determined using Hess's Law and the following three related reactions:
The rate law for the rearrangement of methylisocyanide (CH3NC) to acetontrile (CH3CN) at 800 K is:
NIST-JANAF table deltaG standard formation values at 5400 K for N(g), O(g) and NO(g) are 113.817 kJ/mol, -108.155 kJ/mol and 23.568 kJ/mol.
pure benezene has melting point of 5.5 degree celsius. change in heat for benzene is 9.87 kjmol. calculate the number
Find the contact time for inactivating Gardia cysts - How much contact time would be required for inactivating Gardia cysts
A 300.0cm^3 sample of the solution is then treated with excess HNO3 and boiled to remove all the dissolved gas. A total of 0.955 L of dry CO2 is collected at 298 K and 0.972 atm.
What is the concentration of acetate when 500mL of 0.47M acetic acid is added to 500mL of a pH 5.7 solution
carbon monoxide binds to hemoglobin 140 times more strongly than oxygen does. what does this tell you about the
Cyclopropane (C3H6) reacts to form propene (C3H6) in the gas phase. The reaction is first order in cylclopropane and has a rate constant of 5.87*10^-4/s at 485 C.
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