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The absorbance at 540 nm of 1mM solution of cyanmethemoglobin is 11.0. What is the concentration of cyanmenthemoglobin solution whose absorbance in a 1mm cell is 0.690.
The reaction of 2,2-dimethyl-1-propanol with HBr is very slow and gives 2-bromo-2-methyl-propane as the major product. Give a mechanistic explanation for these observations
A procedure was performed on a 0.49 g sample of copper oxide and 0.40 g of dry copper metal was recovered. Show all the steps solving for the empirical formula of copper oxide and keep significant figures in mind.
Explain what is the pH of the solution when 18.30 mL of 0.137 M trisodium hemimellitalate (trisodium benzene 1,2,3, tricarobxylate) is mixed with 25.00mL of 0.274 M HNO3 (to two d.p.)
Calculate the Calorimeter Constant if 25 g of water at 50 C was added to 25 g of water at 25C with a resulting temperature of 35 C?
How many moles of HF (Ka = 6.8 10-4) must be present in 0.165 L to form a solution with a pH of 2.25?
exactly 16.9mL of EDTA are required to reach the EBT endpoint. calculate the total hardness in ppm CaCO3.
The structure of biphenyl and the numbering scheme used in naming its derivatives are indicated below. What is the major product obtained on dinitration of biphenyl (HNO3, H2SO4)
Compound A reacts with methylmagnesium bromide to give, after hydrolysis, compound B. Reaction of B with sodium dichromate gives C, C5H10O, which gives a crystalline product with 2, 4-dinitrophenylhydrazine and a positive iodoform test. Explain yo..
Strontium chloride reacts with silver nitrate according to the equation SrCl2 + 2AgNO3 → 2AgCl + Sr(NO3)2 What is the percentage yield for a reaction in which 2.50 g of AgCl is obtained from 1.50 g of strontium chloride and a slight excess of silv..
What is the molarity of Cl- ions in a solution prepared by dissolving 5.0 g NaCl (molar mass=58.44) in 1.5 L of 0.025 M AlCl3
A gaseous fuel mixture stored at 752 mmHg and 298 K contains only methane and propane . When 11.6L of this fuel mixture is burned, it produces 767kJ of heat methane : 890 kJ/mol propane : 2,220 kJ/mol
A 10.0 balloon contains gas at a pressure of 640 torr. What is the new pressure of the gas at the 22.0 liters volumes if there is no change in temperature.
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