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The solubility of benzoic acid in water is 5.9 g/100 mL at 100°C; 0.30 g/ 100 mL at 25°C; and 0.17 g/100 mL at 0°C. Can a mixture of approximately equal amounts of benzoic acid and salicylic acid be separated by recrystallization? Explain.
How can you visually demonstrate that a substance is insoluble or just slightly soluble. Some solid remains in both cases.
Define they hydrogen atom is not actually electronegative enough to form bonds to xenon. Explain were the xenon-hydrogen bond to exist, Define what would be the structure of XeH4
a mixture of these these gases has a total pressure of 1380 mmhg at 298 k. the mixture is analyzed and is found to
25.0 mL of a calcium chloride solution is added to an excess of aqueous silver nitrate. The resulting precipitate has a mass of 1.25 grams. If the percent yield of this reaction is known to be 85%, calculate the concentration in molarity of the or..
A H atom emitts a photon with a wavelength of 4.34 × 102 nm. If the energy of the initial state of the H atom was -8.72 × 10(-20) J, calculate the energy of the final state. Express answer in scientific notation.
Calculate the energy required to heat 1.30 kg of ethane gas (C2H6) from 27.0°C to 78.0°C first under conditions of constant volume and then at a constant pressure of 2.00 atm.
Diethyl ether C4H10O(l), a flammable compound that has long been used as a surgical anesthetic has a structure
Penicillase is an enzyme secreted by bacteria to inactivate the antibiotic penicillin. The enzyme has a molar mass of 30,000 and a single active site. The catalytic rate constant is 2000 s-1 and the Michaelis constant is KM = 5 x 10-5 M.
Problem- in the photochemical decomposition of a certain cmpd, light intensity of 5.4 x 10^-6 einsteins s^-1 was employed. Assuming the most favorable conditions, estimate the time needed to decompose 1 mole of the compound.
Heat evolved per mole of Mg 6) Change in enthalpy for the following specific reaction. Be sure to indicate the correct sign (- or +) for the change in enthalpy. Mg(s) + 2H(aq)===>Mg(aq)+H2(g)
During the isomerization of trans-1,2-dibenzoylethylene C16H12O2 using 95% Ethanol C2H6O , and UV light irradiation. What is the overall equation for this reaction. What is the product.
Explain how many moles of solid Ba(N03)2 should be added to 300ml of 0.20 MFE(N03)2 to increase the concentration of the N03 ion to 1.0M. show steps
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