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The basicity test differentiates aromatic and aliphatic amines based on their solubility in a pH 5.5 buffer. Given that Kb for aniline is 4.2e-10, calculate the ratio of amine salt to dissolved amine for aniline in such a buffer.
How many distinct terminal alkynes exist with molecular formula C5H8?
In photosynthesis, plants form glucose and oxygen from carbon dioxide and water. calculate delta H, delta S and delta G of the reaction. Delta H is 2800.
Calculate the concentrations of all species in a 0.700 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
A conducting sphere of radius 10 cm has an unknown charge. If the electric field 20 cm from the centre of the sphere is 1.5 × 103 N/C and points radially inward
Weight and volume measurements on a sample of pure cadmium showed its density to be 521 lb/ft3 is this a 3.5% error?
The first ionization energy, E, of a lithium atom is 0.860 aJ. What is the wavelength of light, in nm, that is just sufficient to ionize a lithium atom
To obtain the formation constant of a 1:1 complex, absorbance data in a 10.0 cm pathlength cell at various ligand concentrations (in M) and a metal concentration of 1.67e-03 M were obtained.
What mass of ethanol, CH3CH2OH, should be dissolved in 450. g of water to obtain a freezing point of 4.5°C?
How much heat energy is needed to raise the temperature of 2.01 Kg of this oil from 23 C to 191 C?
In which of the following complexes are geometric isomers possible, [Co(H2O)4Cl2]+, [Co(NH3)3F3], [Pt(NH3)Br3]-, [Co(en)2(NH3)Cl]2+, if isomers are possible draw their structures and label them as cis or trans
Find the mass fraction and mole fraction of each component, the molar mass of mixture, and it's gas constant.
consider two cells the first with al and ag electrodes and the second with zn and ni electrodes each in appropriate
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