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A sample of 0.1687 g of an unknown monoprotic acid was dissolved in 25.0 mL of water and titrated with 0.1150 M NaOH. The acid required 15.5 mL of base to reach the equivalence point. (a) What is the molecular weight of the acid? (b) After 7.25 mL of base had been added in the titration, the pH was found to be 2.85. What is the Ka for the unknown acid?
Calculate the grams of SO2 gas present at STP in a 5.9 L container. A) 0.24 g B) 0.26 g C) 15 g D) 17 g E) 64 g
determine the molarity of each of the ions present in the following aqueous salt solutions.
A serum sample of a concentration of 23.0 ppm. How many mL of 0.010M EDTA solution would be added to 100 mL of serum sample to get to a final
Which two hydrogen atoms of salicylic acid are most likely to be acidic? which hydrogen atoms of methyl salicylate would you expect to be acidic
write an equat ion which, if solved,would give the average scalar momentum, , of molecules of an equilibrium gas.
how many grams of sodium lactate should be added to 1.00 l of 0.150 lactic acid or to form a buffer solution with
Determine which of the following kinds of light contain enough energy to break chemical bonds in biological molecules by calculating the total energy in 1 mol of photons for light of each wavelength.
the average ph of precipitation in rural areas is 7.00. assuming that the phnbspis controlled by the carbonate system
We add excess Na2CrO4 solution to 17.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.310 grams.
Draw Fischer projection formulas of the major product of the reaction between E-2-methyl-3-hexene and aqueous Br2.
Draw the major organic product from reaction of 1-butyne with NaNH2, then CH3Br. If no reaction occurs, write ethane, CH3CH3.
assume 2 flasks each with one litre of a saturated solution of glucosec6h12o6. one solution has one gram of
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