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In the lab where we prepare N,N-Diethyl-m-toluamide from m-toluic acid, define why was the rxn mixture extracted with 10% aqueous NaOH?
how many grams of Cu2S could be produced if 100.0g of copper is heated with 50.0g of sulfur? what is the amount of excess reactant?
The pH of a 0.010 mol L-1 solution of a weak monoprotic acid is 2.09 at 25oC. What is the pKa for this acid
potassium fluoride is very soluble in glacial acetic acid and the solutions have a number of unusual properties. in an
How many kilojoules of heat must be provided to convert one gram of liquid water at 67 degrees Celsius into one gram of steam at 100 degrees Celsius?
Mesitylene is a liquid hydrocarbon. Burning 0.115 g of the compound in oxygen gives 0.379 g of CO2 and 0.1035 g of H2O. What is the empirical formula of Mesitylene?
As we have seen in the lab, potassium metal reacts explosively with water by producing hydrogen gas and leaving potassium hydroxide in solution. Explain what volume of hydrogen gas is produced when a 0.50 g piece of potassium is added to water at ..
a solution is initially 0.050m in acetate ch3coo- kb 5.6 x 10-10. 10.0ml of 0.10 m hcl is added.a write the chemical
Explain what volume of hydrogen gas is produced when 81.1 g of iron reacts entirely according to the following reaction at 25 degrees Celsius and 1atm
Which of the folowing statements relative to IUPAC nomenclature for alkenes and cycloalkenes is INCORRECT. a.the position of a double bond in a parent chain is given by a single number.
Lakes that have been acidified by acid rain (HNO3 and H2SO4) can be neutralized by a process called liming, in which limestone (CaCO3) is added to the acidified water. What mass of limestone (in Kg) would completely neutralize a 15.5 billion-liter..
A change in the primary sequence of a protein will never change how a protein is allosteric regulated. a.) True b.) False Which of the following is NOT a mechanism of enzyme regulation? a.) Feedback inhibition by a product. b.) Addition or removal..
Explain the solubility of caffeine in water in 2.2mg/mL at 25C and 670 mg/mL at 100C. Explain how mL of boiling water would it take to dissolve 23g of caffeine? Explain if the solution was cooled to 25C, Explain how many grams of caffeine would re..
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