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For the formation of a photchromic imine you use ammonium bromide. Give 2 reasons why you cannot use concentrated HBr.
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol).
the xy-plane and the C-atom skeleton lies on the x axis, what is the hybridization of C for the right-side CH2 group?
How much heat is required to convert 83 g of nitrogen gas to NO2 at constant temperature and pressure in the presence of excess oxygen
Find the molarity of a solution prepared by dissolving 120 g CaCl2 (MW = 111 g/mol) in 450 cm3 of solution.
An electrochemical cell was constructed from Sn/Sn2+ and Pb/Pb2+ with KNO3 as the salt bridge. The concentrations were Sn2+ =1.0M and Pb2+ = 0.1M.
What are the values of (i) the pressure, (ii) the molar fraction of benzene in the liquid phase, and (iii) the molar fraction of benzene in the vapor phase when 1/4 the initial vapor phase has condensed
basketball with a volume of 3.50 Liters is left in a car when the temperature is 298 K. What will the volume of the ball be as the car heats up to 305 K during the day?
The proteins in the mixture are separated by chromatography. You have reason to believe that your unknown protein is an enzyme which catalyzes the cleavage of phosphodiester bonds.
Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 1105 kHz (typical frequency for AM radio broadcasting) (assume four significant figures)
a researcher requires 20l if a buffer solution with pH=4.25. How many moles of formic acid, and sodium fomate, could be dissolved in the solution to make this buffer, if none of the equillibrium concentrations should be under 0.100M?
An expanding gas does 150.0 J of work on its surroundings at a constant pressure of 1.01 atm. If the gas initially occupied 68.0 mL, what is the final volume of the gas.
A 24.9 mL volule of nitric acid reacts completely with 55.0 mL of aqueous sodium sulfide. The Reaction is 2 HNO3 (aq) + Na2S (aq) --> H2S (g) + 2 NaNO3 (aq) The volume of H2S(g) formed is 141 mL at 27*C and 735 mmHg. Determine the molarity of the n..
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