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Ascorbic acid (Vitamin C, present in apples) is burned in the presence of excess oxygen, to yield 5.80 mg CO2 and 1.58 mg H2O. Knowing that ascorbic acid contains only C, H, and O, and the mass of the sample used in the combustion was 3.87 mg:
1) Determine the empirical formula of ascorbic acid.
Draw additional molecules of sulfanilamide and hypothesize the intermolecular interactions that are most important for providing a stable and selective crystal structure
What is the pH of a solution of 0.700 M K2HO4, potassium hydrogen phosphate. What is the pH of a solution of 0.450 M KH2PO4, potassium dihydrogen phosphate
how does the rate of formation of O2 compare to (a) the rate of formation of H2O and (b) the rate of disappearance of H2O2?
Calculate the ph at the equivalence point for the following titration 0.20M HCl versus 0.20M methylamine (CH3NH2). The Ka of methylammonium is 2.3x10^-11.
A hydrogen atom with its electron in the n=3 energy level absorbs light with a wavelength of 1879 nm. the final energy level of the electron is
calculate the ph of a buffer made with 0.50m phosphoric acid and 0.75m sodium dihydrogenphosphate. ka 7.5 x
54g of a certain metal at 98 degree Celsius was placed into 80ml of water at 297K. Assuming no heat is lost to the surrounding, what is the temperature of the water and the metal
a 0.21l sample of hydrogen gas is collected over water. the reaction that allowed the gas to be liberated was between
The compound 2-methyl-1,4-pentadiene would be classified as what type of diene? Select the least stable diene listed below
In basic solution CrO42- oxidizes HSnO2- to HSnO3- and is reduced to CrO2-. Write the balanced net ionic equation for this reaction. How many OH- are there in the balanced equation
A nonmetal oxide dissolves in water to give an acid. Show this for gaseous carbon dioxide by writing a balanced chemical equation. (b) A metal oxide dissolves in water to give a base. Show this for solid potassium oxide by writing a balanced chemi..
what is the grams of 9.31 x 10^24 molecules of methanol (CH3OH)? combining 0.357 mol of Fe2O3 with excess carbon produced 19.2g of Fe ; Fe2O3 + 3C ---> 2Fe + 3CO what is the actual yield of iron?
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