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How many grams of formic acid, HCOOH, must be added to 0.240 L of 0.110 M sodium formate, HCOONa, to yield a buffer solution with a pH of 3.50? Assume no volume change. Ka of HCOOH = 5.0 10-4
A. tetrahedral B. square planar C. square pyramidal D. trigonal bipyramidal E.octahedral F. T-shaped G. see-saw, butterfly, or unsymmetrical tetrahedron
Calculate the pH of a buffer that is 0.150 M in NaHCO3 and 0.190 M in Na2CO3.
When light of frequency 1.30x 1015 s-1 shines on the surface of cesium metal, electrons are ejected with a maximum kinetic energy of 5.2x 10-19 J. Calculate the wavelength of this light in nm.
Solutions of hexane and heptane may be considered to be ideal. At 25°C, the vapor pressure of pure hexane is 20.3 kPa and the vapor pressure of pure heptane is 6.08 kPa The activity relative to a pure liquid standard state is defined as the ratio ..
a gas has a volume of 800.0 ml at minus 23.00 degc and 300.0 torr. what would the volume of the gas be at 227.0 degc
Making this assumption, determine the number of moles of Ca2+ present in the bottled water sample titrated. enter your answer with 3 significant figures
evaluate its purity and to determine whether it might be identical to a given sample of an illegal drug, a white crystalline solid. Clearly explain what you would do, why you would do it, and how you interpret your results
At equilibrium, the flask containing the reacting mixture Ni(s) + 4 CO(g) --> Ni(CO)4(g) contains 232 torr CO, 1240 torr Ni(CO)4, and 1.82 g Ni at 510°C. What are the Kc and KP for this reaction
How many ml of oxygen is dissolved in 50 ml blood plasma at 38 degrees C, if the partial pressure of oxygen in the plasma is 13.3 kPa?
Consider the following reaction. N2(g) + 3H2(g) > 2NH3(g) The initial pressures of the H2 IS 3 atm and the pressure of the N2 IS 2 atm. Which statement is true? N2 is a limiting reagent H2 is a limiting reagent Neither gas is a limiting reagent
What functional group is a: double bonded O that is single bonded to another O and single bond CH3
What volume of 2.48 M sulfuric acid (in mL) produces 0.334 moles of H+ in the solution? Do not enter units with your answer.
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